static int get_cell(DCELL *result, int fd, double x, double y)
{
static DCELL *row1, *row2;
static int cur_row = -1;
static int row, col;
DCELL *tmp;
if (!row1) {
row1 = Rast_allocate_d_buf();
row2 = Rast_allocate_d_buf();
}
col = (int)floor(x - 0.5);
row = (int)floor(y - 0.5);
x -= col + 0.5;
y -= row + 0.5;
if (row < 0 || row + 1 >= Rast_window_rows() ||
col < 0 || col + 1 >= Rast_window_cols()) {
Rast_set_d_null_value(result, 1);
return 0;
}
if (cur_row != row) {
if (cur_row == row + 1) {
tmp = row1; row1 = row2; row2 = tmp;
Rast_get_d_row(fd, row1, row);
}
else if (cur_row == row - 1) {
tmp = row1; row1 = row2; row2 = tmp;
Rast_get_d_row(fd, row2, row + 1);
}
else {
Rast_get_d_row(fd, row1, row);
Rast_get_d_row(fd, row2, row + 1);
}
cur_row = row;
}
if (Rast_is_d_null_value(&row1[col]) || Rast_is_d_null_value(&row1[col+1]) ||
Rast_is_d_null_value(&row2[col]) || Rast_is_d_null_value(&row2[col+1])) {
Rast_set_d_null_value(result, 1);
return 0;
}
*result = Rast_interp_bilinear(x, y,
row1[col], row1[col+1],
row2[col], row2[col+1]);
return 1;
}
int randsurf(char *out, /* Name of raster maps to be opened. */
int min, int max, /* Minimum and maximum cell values. */
int int_map)
{ /* if map is to be written as a CELL map */
int nrows, ncols; /* Number of cell rows and columns */
DCELL *row_out_D; /* Buffer just large enough to hold one */
CELL *row_out_C; /* row of the raster map layer. */
int fd_out; /* File descriptor - used to identify */
/* open raster maps. */
int row_count, col_count;
/****** INITIALISE RANDOM NUMBER GENERATOR ******/
G_math_rand(-1 * getpid());
/****** OPEN CELL FILES AND GET CELL DETAILS ******/
fd_out = Rast_open_new(out, int_map ? CELL_TYPE : DCELL_TYPE);
nrows = Rast_window_rows();
ncols = Rast_window_cols();
if (int_map)
row_out_C = Rast_allocate_c_buf();
else
row_out_D = Rast_allocate_d_buf();
/****** PASS THROUGH EACH CELL ASSIGNING RANDOM VALUE ******/
for (row_count = 0; row_count < nrows; row_count++) {
G_percent(row_count, nrows, 2);
for (col_count = 0; col_count < ncols; col_count++) {
if (int_map)
*(row_out_C + col_count) =
(CELL) (G_math_rand(2742) * (max + 1 - min) + min);
/* under represents first and last bin */
/* *(row_out_C + col_count) = (CELL) floor(rand1(2742)*(max-min)+min +0.5); */
else
*(row_out_D + col_count) =
(DCELL) (G_math_rand(2742) * (max - min) + min);
}
/* Write contents row by row */
if (int_map)
Rast_put_c_row(fd_out, (CELL *) row_out_C);
else
Rast_put_d_row(fd_out, (DCELL *) row_out_D);
}
G_percent(1, 1, 1);
Rast_close(fd_out);
return 0;
}
static void do_output(int base_fd, char **outputs, const char *covermap)
{
int *out_fd = G_malloc(num_quants * sizeof(int));
CELL *base_buf = Rast_allocate_c_buf();
DCELL *out_buf = Rast_allocate_d_buf();
const char *mapset = G_mapset();
struct Colors colors;
int have_colors;
int quant;
int row, col;
G_message(_("Writing output maps"));
for (quant = 0; quant < num_quants; quant++) {
const char *output = outputs[quant];
out_fd[quant] = Rast_open_fp_new(output);
}
have_colors = Rast_read_colors(covermap, "", &colors) > 0;
for (row = 0; row < rows; row++) {
Rast_get_c_row(base_fd, base_buf, row);
for (quant = 0; quant < num_quants; quant++) {
for (col = 0; col < cols; col++)
if (Rast_is_c_null_value(&base_buf[col]))
Rast_set_d_null_value(&out_buf[col], 1);
else
out_buf[col] = basecats[base_buf[col] - min].quants[quant];
Rast_put_d_row(out_fd[quant], out_buf);
}
G_percent(row, rows, 2);
}
G_percent(row, rows, 2);
for (quant = 0; quant < num_quants; quant++) {
Rast_close(out_fd[quant]);
if (have_colors)
Rast_write_colors(outputs[quant], mapset, &colors);
}
}
static void fill_bins(int basefile, int coverfile)
{
CELL *basebuf = Rast_allocate_c_buf();
DCELL *coverbuf = Rast_allocate_d_buf();
int row, col;
G_message(_("Binning data"));
for (row = 0; row < rows; row++) {
Rast_get_c_row(basefile, basebuf, row);
Rast_get_d_row(coverfile, coverbuf, row);
for (col = 0; col < cols; col++) {
struct basecat *bc;
int i, bin;
struct bin *b;
if (Rast_is_c_null_value(&basebuf[col]))
continue;
if (Rast_is_d_null_value(&coverbuf[col]))
continue;
i = get_slot(coverbuf[col]);
bc = &basecats[basebuf[col] - min];
if (!bc->slot_bins[i])
continue;
bin = bc->slot_bins[i] - 1;
b = &bc->bins[bin];
bc->values[b->base + b->count++] = coverbuf[col];
}
G_percent(row, rows, 2);
}
G_percent(rows, rows, 2);
G_free(basebuf);
G_free(coverbuf);
}
static void get_region_range(int fd)
{
DCELL *buf = Rast_allocate_d_buf();
int nrows = Rast_window_rows();
int ncols = Rast_window_cols();
int row, col;
min = 1e300;
max = -1e300;
for (row = 0; row < nrows; row++) {
Rast_get_d_row(fd, buf, row);
for (col = 0; col < ncols; col++) {
if (min > buf[col])
min = buf[col];
if (max < buf[col])
max = buf[col];
}
}
}
/*!
* \brief Extract a cell value from raster map (neighbor interpolation)
*
* Extract a cell value from raster map at given northing and easting
* with a sampled 3x3 window using a neighbor interpolation.
*
* \param fd file descriptor
* \param window region settings
* \param cats categories
* \param north northing position
* \param east easting position
* \param usedesc flag to scan category label
*
* \return cell value at given position
*/
DCELL Rast_get_sample_nearest(int fd,
const struct Cell_head * window,
struct Categories * cats,
double north, double east, int usedesc)
{
int row, col;
DCELL result;
DCELL *maprow = Rast_allocate_d_buf();
/* convert northing and easting to row and col, resp */
row = (int)floor(Rast_northing_to_row(north, window));
col = (int)floor(Rast_easting_to_col(east, window));
if (row < 0 || row >= Rast_window_rows() ||
col < 0 || col >= Rast_window_cols()) {
Rast_set_d_null_value(&result, 1);
goto done;
}
Rast_get_d_row(fd, maprow, row);
if (Rast_is_d_null_value(&maprow[col])) {
Rast_set_d_null_value(&result, 1);
goto done;
}
if (usedesc) {
char *buf = Rast_get_c_cat((CELL *) & (maprow[col]), cats);
G_squeeze(buf);
result = scancatlabel(buf);
}
else
result = maprow[col];
done:
G_free(maprow);
return result;
}
int openfiles(struct parms *parms, struct files *files)
{
struct Ref Ref; /* subgroup reference list */
int n;
if (!I_get_subgroup_ref(parms->group, parms->subgroup, &Ref))
G_fatal_error(_("Unable to read REF file for subgroup <%s> in group <%s>"),
parms->subgroup, parms->group);
if (Ref.nfiles <= 0)
G_fatal_error(_("Subgroup <%s> in group <%s> contains no raster maps"),
parms->subgroup, parms->group);
/* allocate file descriptors, and io buffer */
files->cellbuf = Rast_allocate_d_buf();
files->outbuf = Rast_allocate_c_buf();
files->isdata = G_malloc(Rast_window_cols());
files->nbands = Ref.nfiles;
files->band_fd = (int *)G_calloc(Ref.nfiles, sizeof(int));
/* open all group maps for reading */
for (n = 0; n < Ref.nfiles; n++)
files->band_fd[n] =
open_cell_old(Ref.file[n].name, Ref.file[n].mapset);
/* open output map */
files->output_fd = open_cell_new(parms->output_map);
if (parms->goodness_map)
files->goodness_fd = Rast_open_new(parms->goodness_map, FCELL_TYPE);
else
files->goodness_fd = -1;
return 0;
}
static void get_slot_counts(int basefile, int coverfile)
{
CELL *basebuf = Rast_allocate_c_buf();
DCELL *coverbuf = Rast_allocate_d_buf();
int row, col;
G_message(_("Computing histograms"));
for (row = 0; row < rows; row++) {
Rast_get_c_row(basefile, basebuf, row);
Rast_get_d_row(coverfile, coverbuf, row);
for (col = 0; col < cols; col++) {
struct basecat *bc;
int i;
if (Rast_is_c_null_value(&basebuf[col]))
continue;
if (Rast_is_d_null_value(&coverbuf[col]))
continue;
i = get_slot(coverbuf[col]);
bc = &basecats[basebuf[col] - min];
bc->slots[i]++;
bc->total++;
}
G_percent(row, rows, 2);
}
G_percent(rows, rows, 2);
G_free(basebuf);
G_free(coverbuf);
}
/* ************************************************************************* */
void rast3d_cross_section(void *map,RASTER3D_Region region, int elevfd, int outfd)
{
int col, row;
int rows, cols, depths, typeIntern;
FCELL *fcell = NULL;
DCELL *dcell = NULL;
void *elevrast;
void *ptr;
int intvalue;
float fvalue;
double dvalue;
double elevation = 0;
double north, east;
struct Cell_head window;
Rast_get_window(&window);
rows = region.rows;
cols = region.cols;
depths = region.depths;
/*Typ of the RASTER3D Tile */
typeIntern = Rast3d_tile_type_map(map);
/*Allocate mem for the output maps row */
if (typeIntern == FCELL_TYPE)
fcell = Rast_allocate_f_buf();
else if (typeIntern == DCELL_TYPE)
dcell = Rast_allocate_d_buf();
/*Mem for the input map row */
elevrast = Rast_allocate_buf(globalElevMapType);
for (row = 0; row < rows; row++) {
G_percent(row, rows - 1, 10);
/*Read the input map row */
Rast_get_row(elevfd, elevrast, row, globalElevMapType);
for (col = 0, ptr = elevrast; col < cols; col++, ptr =
G_incr_void_ptr(ptr, Rast_cell_size(globalElevMapType))) {
if (Rast_is_null_value(ptr, globalElevMapType)) {
if (typeIntern == FCELL_TYPE)
Rast_set_null_value(&fcell[col], 1, FCELL_TYPE);
else if (typeIntern == DCELL_TYPE)
Rast_set_null_value(&dcell[col], 1, DCELL_TYPE);
continue;
}
/*Read the elevation value */
if (globalElevMapType == CELL_TYPE) {
intvalue = *(CELL *) ptr;
elevation = intvalue;
} else if (globalElevMapType == FCELL_TYPE) {
fvalue = *(FCELL *) ptr;
elevation = fvalue;
} else if (globalElevMapType == DCELL_TYPE) {
dvalue = *(DCELL *) ptr;
elevation = dvalue;
}
/* Compute the coordinates */
north = Rast_row_to_northing((double)row + 0.5, &window);
east = Rast_col_to_easting((double)col + 0.5, &window);
/* Get the voxel value */
if (typeIntern == FCELL_TYPE)
Rast3d_get_region_value(map, north, east, elevation, &fcell[col], FCELL_TYPE);
if (typeIntern == DCELL_TYPE)
Rast3d_get_region_value(map, north, east, elevation, &dcell[col], DCELL_TYPE);
}
/*Write the data to the output map */
if (typeIntern == FCELL_TYPE)
Rast_put_f_row(outfd, fcell);
if (typeIntern == DCELL_TYPE)
Rast_put_d_row(outfd, dcell);
}
G_debug(3, "\nDone\n");
/*Free the mem */
if (elevrast)
G_free(elevrast);
if (dcell)
G_free(dcell);
if (fcell)
G_free(fcell);
}
int MyApp::load_files(void)
{
DCELL *dcell;
unsigned char *tr, *tg, *tb, *tset;
int tsiz, coff;
int rowoff, row, col, vxoff, vyoff;
int cnt, ret, fd;
int vnum;
const char *name;
struct Colors colors;
dcell = Rast_allocate_d_buf();
tsiz = Rast_window_cols();
/* allocate memory */
tr = (unsigned char *) G_malloc(tsiz * sizeof(char));
tg = (unsigned char *) G_malloc(tsiz * sizeof(char));
tb = (unsigned char *) G_malloc(tsiz * sizeof(char));
tset = (unsigned char *) G_malloc(tsiz * sizeof(char));
wxImage img(ncols, nrows);
for (cnt = 0; cnt < frames; cnt++) {
if (cnt > MAXIMAGES) {
cnt--;
break;
}
for (vnum = 0; vnum < numviews; vnum++) {
if (icols == vcols) {
vxoff = BORDER_W;
vyoff = (irows == vrows) ? BORDER_W :
BORDER_W + vnum * (BORDER_W + vrows);
}
else if (irows == vrows) {
vxoff = (icols == vcols) ? BORDER_W :
BORDER_W + vnum * (BORDER_W + vcols);
vyoff = BORDER_W;
}
else { /* 4 views */
/* assumes we want :
view1 view2
view3 view4
*/
vxoff = vnum % 2 ? BORDER_W : vcols + 2 * BORDER_W;
vyoff = vnum > 1 ? vrows + 2 * BORDER_W : BORDER_W;
}
if (!cnt) {
LabelPos[vnum][0] = vxoff;
LabelPos[vnum][1] = vyoff + vrows - 1;
}
name = vfiles[vnum][cnt];
G_message(_("Reading file [%s]..."), name);
fd = Rast_open_old(name, "");
if (fd < 0)
G_fatal_error(_("Unable to open raster map <%s>"), name);
/*
strcpy(title[cnt],G_get_cell_title(name, mapset));
*/
ret = Rast_read_colors(name, "", &colors);
if (ret < 0)
G_fatal_error(_("Unable to read color file"));
for (row = 0; row < vrows; row++) {
Rast_get_d_row(fd, dcell, (int)(row / vscale));
rowoff = (vyoff + row) * ncols;
Rast_lookup_d_colors(dcell, tr, tg, tb, tset, tsiz, &colors);
for (col = 0; col < vcols; col++) {
coff = (int)(col / vscale);
if (!tset[coff])
img.SetRGB(vxoff + col, vyoff + row, 255, 255, 255);
else
img.SetRGB(vxoff + col, vyoff + row, tr[coff], tg[coff], tb[coff]);
}
}
Rast_close(fd);
}
wxBitmap *bmp = new wxBitmap(img);
pic_array[cnt] = bmp;
mainwin->canvas->draw_image(bmp);
mainwin->change_label(frame[cnt]);
}
G_free(dcell);
G_free(tr);
G_free(tg);
G_free(tb);
G_free(tset);
return cnt;
}
int main(int argc, char *argv[])
{
int fd, maskfd;
CELL *mask;
DCELL *dcell;
struct GModule *module;
struct History history;
int row, col;
int searchrow, searchcolumn, pointsfound;
int *shortlistrows = NULL, *shortlistcolumns = NULL;
long ncells = 0;
double north, east;
double dist;
double sum1, sum2, interp_value;
int n;
double p;
struct
{
struct Option *input, *npoints, *power, *output, *dfield, *col;
} parm;
struct
{
struct Flag *noindex;
} flag;
struct cell_list
{
int row, column;
struct cell_list *next;
};
struct cell_list **search_list = NULL, **search_list_start = NULL;
int max_radius, radius;
int searchallpoints = 0;
char *tmpstr1, *tmpstr2;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("surface"));
G_add_keyword(_("interpolation"));
G_add_keyword(_("IDW"));
module->description =
_("Provides surface interpolation from vector point data by Inverse "
"Distance Squared Weighting.");
parm.input = G_define_standard_option(G_OPT_V_INPUT);
parm.dfield = G_define_standard_option(G_OPT_V_FIELD);
parm.col = G_define_standard_option(G_OPT_DB_COLUMN);
parm.col->required = NO;
parm.col->label = _("Name of attribute column with values to interpolate");
parm.col->description = _("If not given and input is 2D vector map then category values are used. "
"If input is 3D vector map then z-coordinates are used.");
parm.col->guisection = _("Values");
parm.output = G_define_standard_option(G_OPT_R_OUTPUT);
parm.npoints = G_define_option();
parm.npoints->key = "npoints";
parm.npoints->key_desc = "count";
parm.npoints->type = TYPE_INTEGER;
parm.npoints->required = NO;
parm.npoints->description = _("Number of interpolation points");
parm.npoints->answer = "12";
parm.npoints->guisection = _("Settings");
parm.power = G_define_option();
parm.power->key = "power";
parm.power->type = TYPE_DOUBLE;
parm.power->answer = "2.0";
parm.power->label = _("Power parameter");
parm.power->description =
_("Greater values assign greater influence to closer points");
parm.power->guisection = _("Settings");
flag.noindex = G_define_flag();
flag.noindex->key = 'n';
flag.noindex->label = _("Don't index points by raster cell");
flag.noindex->description = _("Slower but uses"
" less memory and includes points from outside region"
" in the interpolation");
flag.noindex->guisection = _("Settings");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
if (sscanf(parm.npoints->answer, "%d", &search_points) != 1 ||
search_points < 1)
G_fatal_error(_("Illegal number (%s) of interpolation points"),
parm.npoints->answer);
list =
(struct list_Point *) G_calloc((size_t) search_points,
sizeof(struct list_Point));
p = atof(parm.power->answer);
/* get the window, dimension arrays */
G_get_window(&window);
if (!flag.noindex->answer) {
npoints_currcell = (long **)G_malloc(window.rows * sizeof(long *));
points =
(struct Point ***)G_malloc(window.rows * sizeof(struct Point **));
for (row = 0; row < window.rows; row++) {
npoints_currcell[row] =
(long *)G_malloc(window.cols * sizeof(long));
points[row] =
(struct Point **)G_malloc(window.cols *
sizeof(struct Point *));
for (col = 0; col < window.cols; col++) {
npoints_currcell[row][col] = 0;
points[row][col] = NULL;
}
}
}
/* read the elevation points from the input sites file */
read_sites(parm.input->answer, parm.dfield->answer,
parm.col->answer, flag.noindex->answer);
if (npoints == 0)
G_fatal_error(_("No points found"));
nsearch = npoints < search_points ? npoints : search_points;
if (!flag.noindex->answer) {
/* Arbitrary point to switch between searching algorithms. Could do
* with refinement PK */
if ((window.rows * window.cols) / npoints > 400) {
/* Using old algorithm.... */
searchallpoints = 1;
ncells = 0;
/* Make an array to contain the row and column indices that have
* sites in them; later will just search through all these. */
for (searchrow = 0; searchrow < window.rows; searchrow++)
for (searchcolumn = 0; searchcolumn < window.cols;
searchcolumn++)
if (npoints_currcell[searchrow][searchcolumn] > 0) {
shortlistrows = (int *)G_realloc(shortlistrows,
(1 +
ncells) *
sizeof(int));
shortlistcolumns =
(int *)G_realloc(shortlistcolumns,
(1 + ncells) * sizeof(int));
shortlistrows[ncells] = searchrow;
shortlistcolumns[ncells] = searchcolumn;
ncells++;
}
}
else {
/* Fill look-up table of row and column offsets for
* doing a circular region growing search looking for sites */
/* Use units of column width */
max_radius = (int)(0.5 + sqrt(window.cols * window.cols +
(window.rows * window.ns_res /
window.ew_res) * (window.rows *
window.ns_res /
window.ew_res)));
search_list =
(struct cell_list **)G_malloc(max_radius *
sizeof(struct cell_list *));
search_list_start =
(struct cell_list **)G_malloc(max_radius *
sizeof(struct cell_list *));
for (radius = 0; radius < max_radius; radius++)
search_list[radius] = NULL;
for (row = 0; row < window.rows; row++)
for (col = 0; col < window.cols; col++) {
radius = (int)sqrt(col * col +
(row * window.ns_res / window.ew_res) *
(row * window.ns_res / window.ew_res));
if (search_list[radius] == NULL)
search_list[radius] =
search_list_start[radius] =
G_malloc(sizeof(struct cell_list));
else
search_list[radius] =
search_list[radius]->next =
G_malloc(sizeof(struct cell_list));
search_list[radius]->row = row;
search_list[radius]->column = col;
search_list[radius]->next = NULL;
}
}
}
/* allocate buffers, etc. */
dcell = Rast_allocate_d_buf();
if ((maskfd = Rast_maskfd()) >= 0)
mask = Rast_allocate_c_buf();
else
mask = NULL;
fd = Rast_open_new(parm.output->answer, DCELL_TYPE);
/* GTC Count of window rows */
G_asprintf(&tmpstr1, n_("%d row", "%d rows", window.rows), window.rows);
/* GTC Count of window columns */
G_asprintf(&tmpstr2, n_("%d column", "%d columns", window.cols), window.cols);
/* GTC First argument is map name, second - message about number of rows, third - columns. */
G_important_message(_("Interpolating raster map <%s> (%s, %s)..."),
parm.output->answer, tmpstr1, tmpstr2);
G_free(tmpstr1);
G_free(tmpstr2);
north = window.north + window.ns_res / 2.0;
for (row = 0; row < window.rows; row++) {
G_percent(row, window.rows, 1);
if (mask)
Rast_get_c_row(maskfd, mask, row);
north -= window.ns_res;
east = window.west - window.ew_res / 2.0;
for (col = 0; col < window.cols; col++) {
east += window.ew_res;
/* don't interpolate outside of the mask */
if (mask && mask[col] == 0) {
Rast_set_d_null_value(&dcell[col], 1);
continue;
}
/* If current cell contains more than nsearch points just average
* all the points in this cell and don't look in any others */
if (!(flag.noindex->answer) && npoints_currcell[row][col] >= nsearch) {
sum1 = 0.0;
for (i = 0; i < npoints_currcell[row][col]; i++)
sum1 += points[row][col][i].z;
interp_value = sum1 / npoints_currcell[row][col];
}
else {
if (flag.noindex->answer)
calculate_distances_noindex(north, east);
else {
pointsfound = 0;
i = 0;
if (searchallpoints == 1) {
/* If there aren't many sites just check them all to find
* the nearest */
for (n = 0; n < ncells; n++)
calculate_distances(shortlistrows[n],
shortlistcolumns[n], north,
east, &pointsfound);
}
else {
radius = 0;
while (pointsfound < nsearch) {
/* Keep widening the search window until we find
* enough points */
search_list[radius] = search_list_start[radius];
while (search_list[radius] != NULL) {
/* Always */
if (row <
(window.rows - search_list[radius]->row)
&& col <
(window.cols -
search_list[radius]->column)) {
searchrow =
row + search_list[radius]->row;
searchcolumn =
col + search_list[radius]->column;
calculate_distances(searchrow,
searchcolumn, north,
east, &pointsfound);
}
/* Only if at least one offset is not 0 */
if ((search_list[radius]->row > 0 ||
search_list[radius]->column > 0) &&
row >= search_list[radius]->row &&
col >= search_list[radius]->column) {
searchrow =
row - search_list[radius]->row;
searchcolumn =
col - search_list[radius]->column;
calculate_distances(searchrow,
searchcolumn, north,
east, &pointsfound);
}
/* Only if both offsets are not 0 */
if (search_list[radius]->row > 0 &&
search_list[radius]->column > 0) {
if (row <
(window.rows -
search_list[radius]->row) &&
col >= search_list[radius]->column) {
searchrow =
row + search_list[radius]->row;
searchcolumn =
col - search_list[radius]->column;
calculate_distances(searchrow,
searchcolumn,
north, east,
&pointsfound);
}
if (row >= search_list[radius]->row &&
col <
(window.cols -
search_list[radius]->column)) {
searchrow =
row - search_list[radius]->row;
searchcolumn =
col + search_list[radius]->column;
calculate_distances(searchrow,
searchcolumn,
north, east,
&pointsfound);
}
}
search_list[radius] =
search_list[radius]->next;
}
radius++;
}
}
}
/* interpolate */
sum1 = 0.0;
sum2 = 0.0;
for (n = 0; n < nsearch; n++) {
if ((dist = sqrt(list[n].dist))) {
sum1 += list[n].z / pow(dist, p);
sum2 += 1.0 / pow(dist, p);
}
else {
/* If one site is dead on the centre of the cell, ignore
* all the other sites and just use this value.
* (Unlikely when using floating point numbers?) */
sum1 = list[n].z;
sum2 = 1.0;
break;
}
}
interp_value = sum1 / sum2;
}
dcell[col] = (DCELL) interp_value;
}
Rast_put_d_row(fd, dcell);
}
G_percent(1, 1, 1);
Rast_close(fd);
/* writing history file */
Rast_short_history(parm.output->answer, "raster", &history);
Rast_command_history(&history);
Rast_write_history(parm.output->answer, &history);
G_done_msg(" ");
exit(EXIT_SUCCESS);
}
int open_files(void)
{
char *name, *mapset;
FILE *fd;
int n;
I_init_group_ref(&Ref);
if (!I_find_group(group))
G_fatal_error(_("Group <%s> not found"), group);
if (!I_find_subgroup(group, subgroup))
G_fatal_error(_("Subgroup <%s> in group <%s> not found"),
subgroup, group);
I_get_subgroup_ref(group, subgroup, &Ref);
if (Ref.nfiles <= 1) {
if (Ref.nfiles <= 0)
G_fatal_error(_("Subgroup <%s> of group <%s> doesn't have any raster maps. "
"The subgroup must have at least 2 raster maps."));
else
G_fatal_error(_("Subgroup <%s> of group <%s> only has 1 raster map. "
"The subgroup must have at least 2 raster maps."));
}
cell = (DCELL **) G_malloc(Ref.nfiles * sizeof(DCELL *));
cellfd = (int *)G_malloc(Ref.nfiles * sizeof(int));
P = (double *)G_malloc(Ref.nfiles * sizeof(double));
for (n = 0; n < Ref.nfiles; n++) {
cell[n] = Rast_allocate_d_buf();
name = Ref.file[n].name;
mapset = Ref.file[n].mapset;
cellfd[n] = Rast_open_old(name, mapset);
}
I_init_signatures(&S, Ref.nfiles);
fd = I_fopen_signature_file_old(group, subgroup, sigfile);
if (fd == NULL)
G_fatal_error(_("Unable to open signature file <%s>"),
sigfile);
n = I_read_signatures(fd, &S);
fclose(fd);
if (n < 0)
G_fatal_error(_("Unable to read signature file <%s>"),
sigfile);
if (S.nsigs > 255)
G_fatal_error(_("<%s> has too many signatures (limit is 255)"),
sigfile);
B = (double *)G_malloc(S.nsigs * sizeof(double));
invert_signatures();
class_fd = Rast_open_c_new(class_name);
class_cell = Rast_allocate_c_buf();
reject_cell = NULL;
if (reject_name) {
reject_fd = Rast_open_c_new(reject_name);
reject_cell = Rast_allocate_c_buf();
}
return 0;
}
int main(int argc, char *argv[])
{
char *p;
int method;
int in_fd;
int selection_fd;
int out_fd;
DCELL *result;
char *selection;
RASTER_MAP_TYPE map_type;
int row, col;
int readrow;
int nrows, ncols;
int n;
int copycolr;
int half;
stat_func *newvalue;
stat_func_w *newvalue_w;
ifunc cat_names;
double quantile;
const void *closure;
struct Colors colr;
struct Cell_head cellhd;
struct Cell_head window;
struct History history;
struct GModule *module;
struct
{
struct Option *input, *output, *selection;
struct Option *method, *size;
struct Option *title;
struct Option *weight;
struct Option *gauss;
struct Option *quantile;
} parm;
struct
{
struct Flag *align, *circle;
} flag;
DCELL *values; /* list of neighborhood values */
DCELL(*values_w)[2]; /* list of neighborhood values and weights */
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("raster"));
G_add_keyword(_("algebra"));
G_add_keyword(_("statistics"));
module->description =
_("Makes each cell category value a "
"function of the category values assigned to the cells "
"around it, and stores new cell values in an output raster "
"map layer.");
parm.input = G_define_standard_option(G_OPT_R_INPUT);
parm.selection = G_define_standard_option(G_OPT_R_INPUT);
parm.selection->key = "selection";
parm.selection->required = NO;
parm.selection->description = _("Name of an input raster map to select the cells which should be processed");
parm.output = G_define_standard_option(G_OPT_R_OUTPUT);
parm.method = G_define_option();
parm.method->key = "method";
parm.method->type = TYPE_STRING;
parm.method->required = NO;
parm.method->answer = "average";
p = G_malloc(1024);
for (n = 0; menu[n].name; n++) {
if (n)
strcat(p, ",");
else
*p = 0;
strcat(p, menu[n].name);
}
parm.method->options = p;
parm.method->description = _("Neighborhood operation");
parm.method->guisection = _("Neighborhood");
parm.size = G_define_option();
parm.size->key = "size";
parm.size->type = TYPE_INTEGER;
parm.size->required = NO;
parm.size->description = _("Neighborhood size");
parm.size->answer = "3";
parm.size->guisection = _("Neighborhood");
parm.title = G_define_option();
parm.title->key = "title";
parm.title->key_desc = "phrase";
parm.title->type = TYPE_STRING;
parm.title->required = NO;
parm.title->description = _("Title of the output raster map");
parm.weight = G_define_standard_option(G_OPT_F_INPUT);
parm.weight->key = "weight";
parm.weight->required = NO;
parm.weight->description = _("Text file containing weights");
parm.gauss = G_define_option();
parm.gauss->key = "gauss";
parm.gauss->type = TYPE_DOUBLE;
parm.gauss->required = NO;
parm.gauss->description = _("Sigma (in cells) for Gaussian filter");
parm.quantile = G_define_option();
parm.quantile->key = "quantile";
parm.quantile->type = TYPE_DOUBLE;
parm.quantile->required = NO;
parm.quantile->description = _("Quantile to calculate for method=quantile");
parm.quantile->options = "0.0-1.0";
parm.quantile->answer = "0.5";
flag.align = G_define_flag();
flag.align->key = 'a';
flag.align->description = _("Do not align output with the input");
flag.circle = G_define_flag();
flag.circle->key = 'c';
flag.circle->description = _("Use circular neighborhood");
flag.circle->guisection = _("Neighborhood");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
sscanf(parm.size->answer, "%d", &ncb.nsize);
if (ncb.nsize <= 0)
G_fatal_error(_("Neighborhood size must be positive"));
if (ncb.nsize % 2 == 0)
G_fatal_error(_("Neighborhood size must be odd"));
ncb.dist = ncb.nsize / 2;
if (parm.weight->answer && flag.circle->answer)
G_fatal_error(_("weight= and -c are mutually exclusive"));
if (parm.weight->answer && parm.gauss->answer)
G_fatal_error(_("weight= and gauss= are mutually exclusive"));
ncb.oldcell = parm.input->answer;
ncb.newcell = parm.output->answer;
if (!flag.align->answer) {
Rast_get_cellhd(ncb.oldcell, "", &cellhd);
G_get_window(&window);
Rast_align_window(&window, &cellhd);
Rast_set_window(&window);
}
nrows = Rast_window_rows();
ncols = Rast_window_cols();
/* open raster maps */
in_fd = Rast_open_old(ncb.oldcell, "");
map_type = Rast_get_map_type(in_fd);
/* get the method */
for (method = 0; (p = menu[method].name); method++)
if ((strcmp(p, parm.method->answer) == 0))
break;
if (!p) {
G_warning(_("<%s=%s> unknown %s"),
parm.method->key, parm.method->answer, parm.method->key);
G_usage();
exit(EXIT_FAILURE);
}
if (menu[method].method == c_quant) {
quantile = atoi(parm.quantile->answer);
closure = &quantile;
}
half = (map_type == CELL_TYPE) ? menu[method].half : 0;
/* establish the newvalue routine */
newvalue = menu[method].method;
newvalue_w = menu[method].method_w;
/* copy color table? */
copycolr = menu[method].copycolr;
if (copycolr) {
G_suppress_warnings(1);
copycolr =
(Rast_read_colors(ncb.oldcell, "", &colr) > 0);
G_suppress_warnings(0);
}
/* read the weights */
if (parm.weight->answer) {
read_weights(parm.weight->answer);
if (!newvalue_w)
weights_mask();
}
else if (parm.gauss->answer) {
if (!newvalue_w)
G_fatal_error(_("Method %s not compatible with Gaussian filter"), parm.method->answer);
gaussian_weights(atof(parm.gauss->answer));
}
else
newvalue_w = NULL;
/* allocate the cell buffers */
allocate_bufs();
result = Rast_allocate_d_buf();
/* get title, initialize the category and stat info */
if (parm.title->answer)
strcpy(ncb.title, parm.title->answer);
else
sprintf(ncb.title, "%dx%d neighborhood: %s of %s",
ncb.nsize, ncb.nsize, menu[method].name, ncb.oldcell);
/* initialize the cell bufs with 'dist' rows of the old cellfile */
readrow = 0;
for (row = 0; row < ncb.dist; row++)
readcell(in_fd, readrow++, nrows, ncols);
/* open the selection raster map */
if (parm.selection->answer) {
G_message(_("Opening selection map <%s>"), parm.selection->answer);
selection_fd = Rast_open_old(parm.selection->answer, "");
selection = Rast_allocate_null_buf();
} else {
selection_fd = -1;
selection = NULL;
}
/*open the new raster map */
out_fd = Rast_open_new(ncb.newcell, map_type);
if (flag.circle->answer)
circle_mask();
if (newvalue_w)
values_w =
(DCELL(*)[2]) G_malloc(ncb.nsize * ncb.nsize * 2 * sizeof(DCELL));
else
values = (DCELL *) G_malloc(ncb.nsize * ncb.nsize * sizeof(DCELL));
for (row = 0; row < nrows; row++) {
G_percent(row, nrows, 2);
readcell(in_fd, readrow++, nrows, ncols);
if (selection)
Rast_get_null_value_row(selection_fd, selection, row);
for (col = 0; col < ncols; col++) {
DCELL *rp = &result[col];
if (selection && selection[col]) {
*rp = ncb.buf[ncb.dist][col];
continue;
}
if (newvalue_w)
n = gather_w(values_w, col);
else
n = gather(values, col);
if (n < 0)
Rast_set_d_null_value(rp, 1);
else {
if (newvalue_w)
newvalue_w(rp, values_w, n, closure);
else
newvalue(rp, values, n, closure);
if (half && !Rast_is_d_null_value(rp))
*rp += 0.5;
}
}
Rast_put_d_row(out_fd, result);
}
G_percent(row, nrows, 2);
Rast_close(out_fd);
Rast_close(in_fd);
if (selection)
Rast_close(selection_fd);
/* put out category info */
null_cats();
if ((cat_names = menu[method].cat_names))
cat_names();
Rast_write_cats(ncb.newcell, &ncb.cats);
if (copycolr)
Rast_write_colors(ncb.newcell, G_mapset(), &colr);
Rast_short_history(ncb.newcell, "raster", &history);
Rast_command_history(&history);
Rast_write_history(ncb.newcell, &history);
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
struct Cell_head cellhd; /*region+header info */
char *mapset; /*mapset name */
int nrows, ncols;
int row, col;
struct GModule *module;
struct Option *input1, *input2, *input3, *input4, *input5;
struct Option *input6, *input7, *input8, *input9, *output1;
struct Flag *flag1;
struct History history; /*metadata */
struct Colors colors; /*Color rules */
char *name; /*input raster name */
char *result; /*output raster name */
int infd_albedo, infd_ndvi, infd_tempk, infd_time, infd_dtair;
int infd_emissivity, infd_tsw, infd_doy, infd_sunzangle;
int outfd;
char *albedo, *ndvi, *tempk, *time, *dtair, *emissivity;
char *tsw, *doy, *sunzangle;
int i = 0, j = 0;
void *inrast_albedo, *inrast_ndvi, *inrast_tempk, *inrast_rnet;
void *inrast_time, *inrast_dtair, *inrast_emissivity, *inrast_tsw;
void *inrast_doy, *inrast_sunzangle;
DCELL * outrast;
CELL val1,val2; /*For color range*/
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("imagery"));
G_add_keyword(_("energy balance"));
G_add_keyword(_("net radiation"));
G_add_keyword(_("SEBAL"));
module->description =
_("Net radiation approximation (Bastiaanssen, 1995).");
/* Define the different options */
input1 = G_define_standard_option(G_OPT_R_INPUT);
input1->key = "albedo";
input1->description = _("Name of albedo raster map [0.0;1.0]");
input2 = G_define_standard_option(G_OPT_R_INPUT);
input2->key = "ndvi";
input2->description = _("Name of NDVI raster map [-1.0;+1.0]");
input3 = G_define_standard_option(G_OPT_R_INPUT);
input3->key = "temperature";
input3->description =
_("Name of surface temperature raster map [K]");
input4 = G_define_standard_option(G_OPT_R_INPUT);
input4->key = "localutctime";
input4->description =
_("Name of time of satellite overpass raster map [local time in UTC]");
input5 = G_define_standard_option(G_OPT_R_INPUT);
input5->key = "temperaturedifference2m";
input5->description =
_("Name of the difference map of temperature from surface skin to about 2 m height [K]");
input6 = G_define_standard_option(G_OPT_R_INPUT);
input6->key = "emissivity";
input6->description = _("Name of the emissivity map [-]");
input7 = G_define_standard_option(G_OPT_R_INPUT);
input7->key = "transmissivity_singleway";
input7->description =
_("Name of the single-way atmospheric transmissivitymap [-]");
input8 = G_define_standard_option(G_OPT_R_INPUT);
input8->key = "dayofyear";
input8->description = _("Name of the Day Of Year (DOY) map [-]");
input9 = G_define_standard_option(G_OPT_R_INPUT);
input9->key = "sunzenithangle";
input9->description = _("Name of the sun zenith angle map [degrees]");
output1 = G_define_standard_option(G_OPT_R_OUTPUT);
output1->description = _("Name of the output net radiation layer");
/********************/
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
albedo = input1->answer;
ndvi = input2->answer;
tempk = input3->answer;
time = input4->answer;
dtair = input5->answer;
emissivity = input6->answer;
tsw = input7->answer;
doy = input8->answer;
sunzangle = input9->answer;
result = output1->answer;
/* Open access to image files and allocate row access memory */
infd_albedo = Rast_open_old(albedo, "");
inrast_albedo = Rast_allocate_d_buf();
infd_ndvi = Rast_open_old(ndvi, "");
inrast_ndvi = Rast_allocate_d_buf();
infd_tempk = Rast_open_old(tempk, "");
inrast_tempk = Rast_allocate_d_buf();
infd_dtair = Rast_open_old(dtair, "");
inrast_dtair = Rast_allocate_d_buf();
infd_time = Rast_open_old(time, "");
inrast_time = Rast_allocate_d_buf();
infd_emissivity = Rast_open_old(emissivity, "");
inrast_emissivity = Rast_allocate_d_buf();
infd_tsw = Rast_open_old(tsw, "");
inrast_tsw = Rast_allocate_d_buf();
infd_doy = Rast_open_old(doy, "");
inrast_doy = Rast_allocate_d_buf();
infd_sunzangle = Rast_open_old(sunzangle, "");
inrast_sunzangle = Rast_allocate_d_buf();
nrows = Rast_window_rows();
ncols = Rast_window_cols();
outfd = Rast_open_new(result, DCELL_TYPE);
outrast = Rast_allocate_d_buf();
/* Process pixels */
for (row = 0; row < nrows; row++)
{
DCELL d;
DCELL d_albedo;
DCELL d_ndvi;
DCELL d_tempk;
DCELL d_dtair;
DCELL d_time;
DCELL d_emissivity;
DCELL d_tsw;
DCELL d_doy;
DCELL d_sunzangle;
/* Display row process percentage */
G_percent(row, nrows, 2);
/* Load rows for each input image */
Rast_get_d_row(infd_albedo, inrast_albedo, row);
Rast_get_d_row(infd_ndvi, inrast_ndvi, row);
Rast_get_d_row(infd_tempk, inrast_tempk, row);
Rast_get_d_row(infd_dtair, inrast_dtair, row);
Rast_get_d_row(infd_time, inrast_time, row);
Rast_get_d_row(infd_emissivity, inrast_emissivity, row);
Rast_get_d_row(infd_tsw, inrast_tsw, row);
Rast_get_d_row(infd_doy, inrast_doy, row);
Rast_get_d_row(infd_sunzangle, inrast_sunzangle, row);
/*process the data */
for (col = 0; col < ncols; col++)
{
d_albedo = (double)((DCELL *) inrast_albedo)[col];
d_ndvi = (double)((DCELL *) inrast_ndvi)[col];
d_tempk = (double)((DCELL *) inrast_tempk)[col];
d_dtair = (double)((DCELL *) inrast_dtair)[col];
d_time = (double)((DCELL *) inrast_time)[col];
d_emissivity = (double)((DCELL *) inrast_emissivity)[col];
d_tsw = (double)((DCELL *) inrast_tsw)[col];
d_doy = (double)((DCELL *) inrast_doy)[col];
d_sunzangle = (double)((DCELL *) inrast_sunzangle)[col];
/* process NULL Values */
if (Rast_is_d_null_value(&d_albedo) ||
Rast_is_d_null_value(&d_ndvi) ||
Rast_is_d_null_value(&d_tempk) ||
Rast_is_d_null_value(&d_dtair) ||
Rast_is_d_null_value(&d_time) ||
Rast_is_d_null_value(&d_emissivity) ||
Rast_is_d_null_value(&d_tsw) ||
Rast_is_d_null_value(&d_doy) ||
Rast_is_d_null_value(&d_sunzangle)) {
Rast_set_d_null_value(&outrast[col], 1);
}
else {
/************************************/
/* calculate the net radiation */
d = r_net(d_albedo, d_ndvi, d_tempk, d_dtair, d_emissivity, d_tsw, d_doy, d_time, d_sunzangle);
outrast[col] = d;
}
}
Rast_put_d_row(outfd, outrast);
}
G_free(inrast_albedo);
G_free(inrast_ndvi);
G_free(inrast_tempk);
G_free(inrast_dtair);
G_free(inrast_time);
G_free(inrast_emissivity);
G_free(inrast_tsw);
G_free(inrast_doy);
G_free(inrast_sunzangle);
Rast_close(infd_albedo);
Rast_close(infd_ndvi);
Rast_close(infd_tempk);
Rast_close(infd_dtair);
Rast_close(infd_time);
Rast_close(infd_emissivity);
Rast_close(infd_tsw);
Rast_close(infd_doy);
Rast_close(infd_sunzangle);
G_free(outrast);
Rast_close(outfd);
/* Colors in grey shade */
Rast_init_colors(&colors);
val1=0;
val2=900;
Rast_add_c_color_rule(&val1, 0, 0, 0, &val2, 255, 255, 255, &colors);
/* Metadata */
Rast_short_history(result, "raster", &history);
Rast_command_history(&history);
Rast_write_history(result, &history);
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
static DCELL *count, *sum, *mean, *sumu, *sum2, *sum3, *sum4, *min, *max;
DCELL *result;
struct GModule *module;
struct {
struct Option *method, *basemap, *covermap, *output;
} opt;
struct {
struct Flag *c, *r;
} flag;
char methods[2048];
const char *basemap, *covermap, *output;
int usecats;
int reclass;
int base_fd, cover_fd;
struct Categories cats;
CELL *base_buf;
DCELL *cover_buf;
struct Range range;
CELL mincat, ncats;
int method;
int rows, cols;
int row, col, i;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("raster"));
G_add_keyword(_("statistics"));
module->description =
_("Calculates category or object oriented statistics (accumulator-based statistics).");
opt.basemap = G_define_standard_option(G_OPT_R_BASE);
opt.covermap = G_define_standard_option(G_OPT_R_COVER);
opt.method = G_define_option();
opt.method->key = "method";
opt.method->type = TYPE_STRING;
opt.method->required = YES;
opt.method->description = _("Method of object-based statistic");
for (i = 0; menu[i].name; i++) {
if (i)
strcat(methods, ",");
else
*(methods) = 0;
strcat(methods, menu[i].name);
}
opt.method->options = G_store(methods);
for (i = 0; menu[i].name; i++) {
if (i)
strcat(methods, ";");
else
*(methods) = 0;
strcat(methods, menu[i].name);
strcat(methods, ";");
strcat(methods, menu[i].text);
}
opt.method->descriptions = G_store(methods);
opt.output = G_define_standard_option(G_OPT_R_OUTPUT);
opt.output->description = _("Resultant raster map");
opt.output->required = YES;
flag.c = G_define_flag();
flag.c->key = 'c';
flag.c->description =
_("Cover values extracted from the category labels of the cover map");
flag.r = G_define_flag();
flag.r->key = 'r';
flag.r->description =
_("Create reclass map with statistics as category labels");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
basemap = opt.basemap->answer;
covermap = opt.covermap->answer;
output = opt.output->answer;
usecats = flag.c->answer;
reclass = flag.r->answer;
for (i = 0; menu[i].name; i++)
if (strcmp(menu[i].name, opt.method->answer) == 0)
break;
if (!menu[i].name) {
G_warning(_("<%s=%s> unknown %s"), opt.method->key, opt.method->answer,
opt.method->key);
G_usage();
exit(EXIT_FAILURE);
}
method = menu[i].val;
base_fd = Rast_open_old(basemap, "");
cover_fd = Rast_open_old(covermap, "");
if (usecats && Rast_read_cats(covermap, "", &cats) < 0)
G_fatal_error(_("Unable to read category file of cover map <%s>"), covermap);
if (Rast_map_is_fp(basemap, "") != 0)
G_fatal_error(_("The base map must be an integer (CELL) map"));
if (Rast_read_range(basemap, "", &range) < 0)
G_fatal_error(_("Unable to read range of base map <%s>"), basemap);
mincat = range.min;
ncats = range.max - range.min + 1;
rows = Rast_window_rows();
cols = Rast_window_cols();
switch (method) {
case COUNT:
count = G_calloc(ncats, sizeof(DCELL));
break;
case SUM:
sum = G_calloc(ncats, sizeof(DCELL));
break;
case MIN:
min = G_malloc(ncats * sizeof(DCELL));
break;
case MAX:
max = G_malloc(ncats * sizeof(DCELL));
break;
case RANGE:
min = G_malloc(ncats * sizeof(DCELL));
max = G_malloc(ncats * sizeof(DCELL));
break;
case AVERAGE:
case ADEV:
case VARIANCE2:
case STDDEV2:
case SKEWNESS2:
case KURTOSIS2:
count = G_calloc(ncats, sizeof(DCELL));
sum = G_calloc(ncats, sizeof(DCELL));
break;
case VARIANCE1:
case STDDEV1:
count = G_calloc(ncats, sizeof(DCELL));
sum = G_calloc(ncats, sizeof(DCELL));
sum2 = G_calloc(ncats, sizeof(DCELL));
break;
case SKEWNESS1:
count = G_calloc(ncats, sizeof(DCELL));
sum = G_calloc(ncats, sizeof(DCELL));
sum2 = G_calloc(ncats, sizeof(DCELL));
sum3 = G_calloc(ncats, sizeof(DCELL));
break;
case KURTOSIS1:
count = G_calloc(ncats, sizeof(DCELL));
sum = G_calloc(ncats, sizeof(DCELL));
sum2 = G_calloc(ncats, sizeof(DCELL));
sum4 = G_calloc(ncats, sizeof(DCELL));
break;
}
if (min)
for (i = 0; i < ncats; i++)
min[i] = 1e300;
if (max)
for (i = 0; i < ncats; i++)
max[i] = -1e300;
base_buf = Rast_allocate_c_buf();
cover_buf = Rast_allocate_d_buf();
G_message(_("First pass"));
for (row = 0; row < rows; row++) {
Rast_get_c_row(base_fd, base_buf, row);
Rast_get_d_row(cover_fd, cover_buf, row);
for (col = 0; col < cols; col++) {
int n;
DCELL v;
if (Rast_is_c_null_value(&base_buf[col]))
continue;
if (Rast_is_d_null_value(&cover_buf[col]))
continue;
n = base_buf[col] - mincat;
if (n < 0 || n >= ncats)
continue;
v = cover_buf[col];
if (usecats)
sscanf(Rast_get_c_cat((CELL *) &v, &cats), "%lf", &v);
if (count)
count[n]++;
if (sum)
sum[n] += v;
if (sum2)
sum2[n] += v * v;
if (sum3)
sum3[n] += v * v * v;
if (sum4)
sum4[n] += v * v * v * v;
if (min && min[n] > v)
min[n] = v;
if (max && max[n] < v)
max[n] = v;
}
G_percent(row, rows, 2);
}
G_percent(row, rows, 2);
result = G_calloc(ncats, sizeof(DCELL));
switch (method) {
case ADEV:
case VARIANCE2:
case STDDEV2:
case SKEWNESS2:
case KURTOSIS2:
mean = G_calloc(ncats, sizeof(DCELL));
for (i = 0; i < ncats; i++)
mean[i] = sum[i] / count[i];
G_free(sum);
break;
}
switch (method) {
case ADEV:
sumu = G_calloc(ncats, sizeof(DCELL));
break;
case VARIANCE2:
case STDDEV2:
sum2 = G_calloc(ncats, sizeof(DCELL));
break;
case SKEWNESS2:
sum2 = G_calloc(ncats, sizeof(DCELL));
sum3 = G_calloc(ncats, sizeof(DCELL));
break;
case KURTOSIS2:
sum2 = G_calloc(ncats, sizeof(DCELL));
sum4 = G_calloc(ncats, sizeof(DCELL));
break;
}
if (mean) {
G_message(_("Second pass"));
for (row = 0; row < rows; row++) {
Rast_get_c_row(base_fd, base_buf, row);
Rast_get_d_row(cover_fd, cover_buf, row);
for (col = 0; col < cols; col++) {
int n;
DCELL v, d;
if (Rast_is_c_null_value(&base_buf[col]))
continue;
if (Rast_is_d_null_value(&cover_buf[col]))
continue;
n = base_buf[col] - mincat;
if (n < 0 || n >= ncats)
continue;
v = cover_buf[col];
if (usecats)
sscanf(Rast_get_c_cat((CELL *) &v, &cats), "%lf", &v);
d = v - mean[n];
if (sumu)
sumu[n] += fabs(d);
if (sum2)
sum2[n] += d * d;
if (sum3)
sum3[n] += d * d * d;
if (sum4)
sum4[n] += d * d * d * d;
}
G_percent(row, rows, 2);
}
G_percent(row, rows, 2);
G_free(mean);
G_free(cover_buf);
}
switch (method) {
case COUNT:
for (i = 0; i < ncats; i++)
result[i] = count[i];
break;
case SUM:
for (i = 0; i < ncats; i++)
result[i] = sum[i];
break;
case AVERAGE:
for (i = 0; i < ncats; i++)
result[i] = sum[i] / count[i];
break;
case MIN:
for (i = 0; i < ncats; i++)
result[i] = min[i];
break;
case MAX:
for (i = 0; i < ncats; i++)
result[i] = max[i];
break;
case RANGE:
for (i = 0; i < ncats; i++)
result[i] = max[i] - min[i];
break;
case VARIANCE1:
for (i = 0; i < ncats; i++) {
double n = count[i];
double var = (sum2[i] - sum[i] * sum[i] / n) / (n - 1);
result[i] = var;
}
break;
case STDDEV1:
for (i = 0; i < ncats; i++) {
double n = count[i];
double var = (sum2[i] - sum[i] * sum[i] / n) / (n - 1);
result[i] = sqrt(var);
}
break;
case SKEWNESS1:
for (i = 0; i < ncats; i++) {
double n = count[i];
double var = (sum2[i] - sum[i] * sum[i] / n) / (n - 1);
double skew = (sum3[i] / n
- 3 * sum[i] * sum2[i] / (n * n)
+ 2 * sum[i] * sum[i] * sum[i] / (n * n * n))
/ (pow(var, 1.5));
result[i] = skew;
}
break;
case KURTOSIS1:
for (i = 0; i < ncats; i++) {
double n = count[i];
double var = (sum2[i] - sum[i] * sum[i] / n) / (n - 1);
double kurt = (sum4[i] / n
- 4 * sum[i] * sum3[i] / (n * n)
+ 6 * sum[i] * sum[i] * sum2[i] / (n * n * n)
- 3 * sum[i] * sum[i] * sum[i] * sum[i] / (n * n * n * n))
/ (var * var) - 3;
result[i] = kurt;
}
break;
case ADEV:
for (i = 0; i < ncats; i++)
result[i] = sumu[i] / count[i];
break;
case VARIANCE2:
for (i = 0; i < ncats; i++)
result[i] = sum2[i] / (count[i] - 1);
break;
case STDDEV2:
for (i = 0; i < ncats; i++)
result[i] = sqrt(sum2[i] / (count[i] - 1));
break;
case SKEWNESS2:
for (i = 0; i < ncats; i++) {
double n = count[i];
double var = sum2[i] / (n - 1);
double sdev = sqrt(var);
result[i] = sum3[i] / (sdev * sdev * sdev) / n;
}
G_free(count);
G_free(sum2);
G_free(sum3);
break;
case KURTOSIS2:
for (i = 0; i < ncats; i++) {
double n = count[i];
double var = sum2[i] / (n - 1);
result[i] = sum4[i] / (var * var) / n - 3;
}
G_free(count);
G_free(sum2);
G_free(sum4);
break;
}
if (reclass) {
const char *tempfile = G_tempfile();
char *input_arg = G_malloc(strlen(basemap) + 7);
char *output_arg = G_malloc(strlen(output) + 8);
char *rules_arg = G_malloc(strlen(tempfile) + 7);
FILE *fp;
G_message(_("Generating reclass map"));
sprintf(input_arg, "input=%s", basemap);
sprintf(output_arg, "output=%s", output);
sprintf(rules_arg, "rules=%s", tempfile);
fp = fopen(tempfile, "w");
if (!fp)
G_fatal_error(_("Unable to open temporary file"));
for (i = 0; i < ncats; i++)
fprintf(fp, "%d = %d %f\n", mincat + i, mincat + i, result[i]);
fclose(fp);
G_spawn("r.reclass", "r.reclass", input_arg, output_arg, rules_arg, NULL);
}
else {
int out_fd;
DCELL *out_buf;
struct Colors colors;
G_message(_("Writing output map"));
out_fd = Rast_open_fp_new(output);
out_buf = Rast_allocate_d_buf();
for (row = 0; row < rows; row++) {
Rast_get_c_row(base_fd, base_buf, row);
for (col = 0; col < cols; col++)
if (Rast_is_c_null_value(&base_buf[col]))
Rast_set_d_null_value(&out_buf[col], 1);
else
out_buf[col] = result[base_buf[col] - mincat];
Rast_put_d_row(out_fd, out_buf);
G_percent(row, rows, 2);
}
G_percent(row, rows, 2);
Rast_close(out_fd);
if (Rast_read_colors(covermap, "", &colors) > 0)
Rast_write_colors(output, G_mapset(), &colors);
}
return 0;
}
int main(int argc, char *argv[])
{
/* buffer for input-output rasters */
void *inrast_TEMPKA, *inrast_PATM, *inrast_RNET, *inrast_G0;
DCELL *outrast;
/* pointers to input-output raster files */
int infd_TEMPKA, infd_PATM, infd_RNET, infd_G0;
int outfd;
/* names of input-output raster files */
char *RNET, *TEMPKA, *PATM, *G0;
char *ETa;
/* input-output cell values */
DCELL d_tempka, d_pt_patm, d_rnet, d_g0;
DCELL d_pt_alpha, d_pt_delta, d_pt_ghamma, d_daily_et;
/* region information and handler */
struct Cell_head cellhd;
int nrows, ncols;
int row, col;
/* parser stuctures definition */
struct GModule *module;
struct Option *input_RNET, *input_TEMPKA, *input_PATM, *input_G0,
*input_PT;
struct Option *output;
struct Flag *zero;
struct Colors color;
struct History history;
/* Initialize the GIS calls */
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("imagery"));
G_add_keyword(_("evapotranspiration"));
module->description =
_("Computes evapotranspiration calculation "
"Priestley and Taylor formulation, 1972.");
/* Define different options */
input_RNET = G_define_standard_option(G_OPT_R_INPUT);
input_RNET->key = "net_radiation";
input_RNET->description = _("Name of input net radiation raster map [W/m2]");
input_G0 = G_define_standard_option(G_OPT_R_INPUT);
input_G0->key = "soil_heatflux";
input_G0->description = _("Name of input soil heat flux raster map [W/m2]");
input_TEMPKA = G_define_standard_option(G_OPT_R_INPUT);
input_TEMPKA->key = "air_temperature";
input_TEMPKA->description = _("Name of input air temperature raster map [K]");
input_PATM = G_define_standard_option(G_OPT_R_INPUT);
input_PATM->key = "atmospheric_pressure";
input_PATM->description = _("Name of input atmospheric pressure raster map [millibars]");
input_PT = G_define_option();
input_PT->key = "priestley_taylor_coeff";
input_PT->type = TYPE_DOUBLE;
input_PT->required = YES;
input_PT->description = _("Priestley-Taylor coefficient");
input_PT->answer = "1.26";
output = G_define_standard_option(G_OPT_R_OUTPUT);
output->description = _("Name of output evapotranspiration raster map [mm/d]");
/* Define the different flags */
zero = G_define_flag();
zero->key = 'z';
zero->description = _("Set negative ETa to zero");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
/* get entered parameters */
RNET = input_RNET->answer;
TEMPKA = input_TEMPKA->answer;
PATM = input_PATM->answer;
G0 = input_G0->answer;
d_pt_alpha = atof(input_PT->answer);
ETa = output->answer;
/* open pointers to input raster files */
infd_RNET = Rast_open_old(RNET, "");
infd_TEMPKA = Rast_open_old(TEMPKA, "");
infd_PATM = Rast_open_old(PATM, "");
infd_G0 = Rast_open_old(G0, "");
/* read headers of raster files */
Rast_get_cellhd(RNET, "", &cellhd);
Rast_get_cellhd(TEMPKA, "", &cellhd);
Rast_get_cellhd(PATM, "", &cellhd);
Rast_get_cellhd(G0, "", &cellhd);
/* Allocate input buffer */
inrast_RNET = Rast_allocate_d_buf();
inrast_TEMPKA = Rast_allocate_d_buf();
inrast_PATM = Rast_allocate_d_buf();
inrast_G0 = Rast_allocate_d_buf();
/* get rows and columns number of the current region */
nrows = Rast_window_rows();
ncols = Rast_window_cols();
/* allocate output buffer */
outrast = Rast_allocate_d_buf();
/* open pointers to output raster files */
outfd = Rast_open_new(ETa, DCELL_TYPE);
/* start the loop through cells */
for (row = 0; row < nrows; row++) {
G_percent(row, nrows, 2);
/* read input raster row into line buffer */
Rast_get_d_row(infd_RNET, inrast_RNET, row);
Rast_get_d_row(infd_TEMPKA, inrast_TEMPKA, row);
Rast_get_d_row(infd_PATM, inrast_PATM, row);
Rast_get_d_row(infd_G0, inrast_G0, row);
for (col = 0; col < ncols; col++) {
/* read current cell from line buffer */
d_rnet = ((DCELL *) inrast_RNET)[col];
d_tempka = ((DCELL *) inrast_TEMPKA)[col];
d_pt_patm = ((DCELL *) inrast_PATM)[col];
d_g0 = ((DCELL *) inrast_G0)[col];
/*Delta_pt and Ghamma_pt */
d_pt_delta = pt_delta(d_tempka);
d_pt_ghamma = pt_ghamma(d_tempka, d_pt_patm);
/*Calculate ET */
d_daily_et =
pt_daily_et(d_pt_alpha, d_pt_delta, d_pt_ghamma, d_rnet, d_g0,
d_tempka);
if (zero->answer && d_daily_et < 0)
d_daily_et = 0.0;
/* write calculated ETP to output line buffer */
outrast[col] = d_daily_et;
}
/* write output line buffer to output raster file */
Rast_put_d_row(outfd, outrast);
}
/* free buffers and close input maps */
G_free(inrast_RNET);
G_free(inrast_TEMPKA);
G_free(inrast_PATM);
G_free(inrast_G0);
Rast_close(infd_RNET);
Rast_close(infd_TEMPKA);
Rast_close(infd_PATM);
Rast_close(infd_G0);
/* generate color table between -20 and 20 */
Rast_make_rainbow_colors(&color, -20, 20);
Rast_write_colors(ETa, G_mapset(), &color);
Rast_short_history(ETa, "raster", &history);
Rast_command_history(&history);
Rast_write_history(ETa, &history);
/* free buffers and close output map */
G_free(outrast);
Rast_close(outfd);
return (EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
unsigned int r, c, rows, cols; /* totals */
int map1_fd, map2_fd;
double sumX, sumY, sumsqX, sumsqY, sumXY;
double meanX, meanY, varX, varY, sdX, sdY;
double A, B, R, F;
long count = 0;
DCELL *map1_buf, *map2_buf, map1_val, map2_val;
char *name;
struct Option *input_map1, *input_map2, *output_opt;
struct Flag *shell_style;
struct Cell_head region;
struct GModule *module;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("raster"));
G_add_keyword(_("statistics"));
module->description =
_("Calculates linear regression from two raster maps: y = a + b*x.");
/* Define the different options */
input_map1 = G_define_standard_option(G_OPT_R_MAP);
input_map1->key = "map1";
input_map1->description = (_("Map for x coefficient"));
input_map2 = G_define_standard_option(G_OPT_R_MAP);
input_map2->key = "map2";
input_map2->description = (_("Map for y coefficient"));
output_opt = G_define_standard_option(G_OPT_F_OUTPUT);
output_opt->key = "output";
output_opt->required = NO;
output_opt->description =
(_("ASCII file for storing regression coefficients (output to screen if file not specified)."));
shell_style = G_define_flag();
shell_style->key = 'g';
shell_style->description = _("Print in shell script style");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
name = output_opt->answer;
if (name != NULL && strcmp(name, "-") != 0) {
if (NULL == freopen(name, "w", stdout)) {
G_fatal_error(_("Unable to open file <%s> for writing"), name);
}
}
G_get_window(®ion);
rows = region.rows;
cols = region.cols;
/* open maps */
map1_fd = Rast_open_old(input_map1->answer, "");
map2_fd = Rast_open_old(input_map2->answer, "");
map1_buf = Rast_allocate_d_buf();
map2_buf = Rast_allocate_d_buf();
sumX = sumY = sumsqX = sumsqY = sumXY = 0.0;
meanX = meanY = varX = varY = sdX = sdY = 0.0;
for (r = 0; r < rows; r++) {
G_percent(r, rows, 2);
Rast_get_d_row(map1_fd, map1_buf, r);
Rast_get_d_row(map2_fd, map2_buf, r);
for (c = 0; c < cols; c++) {
map1_val = map1_buf[c];
map2_val = map2_buf[c];
if (Rast_is_d_null_value(&map1_val) ||
Rast_is_d_null_value(&map2_val))
continue;
sumX += map1_val;
sumY += map2_val;
sumsqX += map1_val * map1_val;
sumsqY += map2_val * map2_val;
sumXY += map1_val * map2_val;
count++;
}
}
Rast_close(map1_fd);
Rast_close(map2_fd);
G_free(map1_buf);
G_free(map2_buf);
B = (sumXY - sumX * sumY / count) / (sumsqX - sumX * sumX / count);
R = (sumXY - sumX * sumY / count) /
sqrt((sumsqX - sumX * sumX / count) * (sumsqY - sumY * sumY / count));
meanX = sumX / count;
sumsqX = sumsqX / count;
varX = sumsqX - (meanX * meanX);
sdX = sqrt(varX);
meanY = sumY / count;
sumsqY = sumsqY / count;
varY = sumsqY - (meanY * meanY);
sdY = sqrt(varY);
A = meanY - B * meanX;
F = R * R / (1 - R * R / count - 2);
if (shell_style->answer) {
fprintf(stdout, "a=%f\n", A);
fprintf(stdout, "b=%f\n", B);
fprintf(stdout, "R=%f\n", R);
fprintf(stdout, "N=%ld\n", count);
fprintf(stdout, "F=%f\n", F);
fprintf(stdout, "meanX=%f\n", meanX);
fprintf(stdout, "sdX=%f\n", sdX);
fprintf(stdout, "meanY=%f\n", meanY);
fprintf(stdout, "sdY=%f\n", sdY);
}
else {
fprintf(stdout, "y = a + b*x\n");
fprintf(stdout, " a (Offset): %f\n", A);
fprintf(stdout, " b (Gain): %f\n", B);
fprintf(stdout, " R (sumXY - sumX*sumY/N): %f\n", R);
fprintf(stdout, " N (Number of elements): %ld\n", count);
fprintf(stdout, " F (F-test significance): %f\n", F);
fprintf(stdout, " meanX (Mean of map1): %f\n", meanX);
fprintf(stdout, " sdX (Standard deviation of map1): %f\n", sdX);
fprintf(stdout, " meanY (Mean of map2): %f\n", meanY);
fprintf(stdout, " sdY (Standard deviation of map2): %f\n", sdY);
}
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
int nrows, ncols;
int row, col;
char *nameflag; /*Switch for particular method */
struct GModule *module;
struct Option *input1, *input2, *output;
struct History history; /*metadata */
/************************************/
char *result; /*output raster name */
int infd_annual_pmm;
int outfd;
char *annual_pmm;
void *inrast_annual_pmm;
DCELL * outrast;
/************************************/
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("raster"));
G_add_keyword(_("hydrology"));
G_add_keyword(_("rainfall"));
G_add_keyword(_("erosion"));
module->description = _("Computes USLE R factor, Rainfall erosivity index.");
input2 = G_define_standard_option(G_OPT_R_INPUT);
input2->description = _("Name of annual precipitation raster map [mm/year]");
output = G_define_standard_option(G_OPT_R_OUTPUT);
output->description = _("Name for output USLE R raster map [MJ.mm/ha.hr.year]");
/* Define the different options */
input1 = G_define_option();
input1->key = "method";
input1->type = TYPE_STRING;
input1->required = YES;
input1->description = _("Name of USLE R equation");
input1->options = "roose, morgan, foster, elswaify";
input1->descriptions = _("roose;Roosle (1975);"
"morgan;Morgan (1974);"
"foster;Foster (1981);"
"elswaify;El-Swaify (1985)");
input1->answer = "morgan";
/********************/
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
nameflag = input1->answer;
annual_pmm = input2->answer;
result = output->answer;
/***************************************************/
infd_annual_pmm = Rast_open_old(annual_pmm, "");
inrast_annual_pmm = Rast_allocate_d_buf();
/***************************************************/
nrows = Rast_window_rows();
ncols = Rast_window_cols();
outrast = Rast_allocate_d_buf();
/* Create New raster files */
outfd = Rast_open_new(result, DCELL_TYPE);
/* Process pixels */
for (row = 0; row < nrows; row++)
{
DCELL d;
DCELL d_annual_pmm;
G_percent(row, nrows, 2);
/* read input map */
Rast_get_d_row(infd_annual_pmm, inrast_annual_pmm, row);
/*process the data */
for (col = 0; col < ncols; col++)
{
d_annual_pmm = ((DCELL *) inrast_annual_pmm)[col];
if (Rast_is_d_null_value(&d_annual_pmm))
Rast_set_d_null_value(&outrast[col], 1);
else
{
/*calculate morgan */
if (!strcmp(nameflag, "morgan"))
d = morgan_1974(d_annual_pmm);
/*calculate roose */
if (!strcmp(nameflag, "roose"))
d = roose_1975(d_annual_pmm);
/*calculate foster */
if (!strcmp(nameflag, "foster"))
d = foster_1981(d_annual_pmm);
/*calculate elswaify */
if (!strcmp(nameflag, "elswaify"))
d = elswaify_1985(d_annual_pmm);
outrast[col] = d ;
}
}
Rast_put_d_row(outfd, outrast);
}
G_free(inrast_annual_pmm);
Rast_close(infd_annual_pmm);
G_free(outrast);
Rast_close(outfd);
Rast_short_history(result, "raster", &history);
Rast_command_history(&history);
Rast_write_history(result, &history);
exit(EXIT_SUCCESS);
}
int open_files(struct globals *globals)
{
struct Ref Ref; /* group reference list */
int *in_fd, bounds_fd, is_null;
int n, row, col, srows, scols, inlen, outlen, nseg;
DCELL **inbuf; /* buffers to store lines from each of the imagery group rasters */
CELL *boundsbuf, bounds_val;
int have_bounds = 0;
CELL s, id;
struct Range range; /* min/max values of bounds map */
struct FPRange *fp_range; /* min/max values of each input raster */
DCELL *min, *max;
struct ngbr_stats Ri, Rk;
/*allocate memory for flags */
globals->null_flag = flag_create(globals->nrows, globals->ncols);
globals->candidate_flag = flag_create(globals->nrows, globals->ncols);
flag_clear_all(globals->null_flag);
flag_clear_all(globals->candidate_flag);
G_debug(1, "Checking image group...");
/* ****** open the input rasters ******* */
if (!I_get_group_ref(globals->image_group, &Ref))
G_fatal_error(_("Group <%s> not found in the current mapset"),
globals->image_group);
if (Ref.nfiles <= 0)
G_fatal_error(_("Group <%s> contains no raster maps"),
globals->image_group);
/* Read Imagery Group */
in_fd = G_malloc(Ref.nfiles * sizeof(int));
inbuf = (DCELL **) G_malloc(Ref.nfiles * sizeof(DCELL *));
fp_range = G_malloc(Ref.nfiles * sizeof(struct FPRange));
min = G_malloc(Ref.nfiles * sizeof(DCELL));
max = G_malloc(Ref.nfiles * sizeof(DCELL));
G_debug(1, "Opening input rasters...");
for (n = 0; n < Ref.nfiles; n++) {
inbuf[n] = Rast_allocate_d_buf();
in_fd[n] = Rast_open_old(Ref.file[n].name, Ref.file[n].mapset);
}
/* Get min/max values of each input raster for scaling */
globals->max_diff = 0.;
globals->nbands = Ref.nfiles;
for (n = 0; n < Ref.nfiles; n++) {
/* returns -1 on error, 2 on empty range, quitting either way. */
if (Rast_read_fp_range(Ref.file[n].name, Ref.file[n].mapset, &fp_range[n]) != 1)
G_fatal_error(_("No min/max found in raster map <%s>"),
Ref.file[n].name);
Rast_get_fp_range_min_max(&(fp_range[n]), &min[n], &max[n]);
G_debug(1, "Range for layer %d: min = %f, max = %f",
n, min[n], max[n]);
}
if (globals->weighted == FALSE)
globals->max_diff = Ref.nfiles;
else {
/* max difference with selected similarity method */
Ri.mean = max;
Rk.mean = min;
globals->max_diff = 1;
globals->max_diff = (*globals->calculate_similarity) (&Ri, &Rk, globals);
}
/* ********** find out file segmentation size ************ */
G_debug(1, "Calculate temp file sizes...");
/* size of each element to be stored */
inlen = sizeof(DCELL) * Ref.nfiles;
outlen = sizeof(CELL);
G_debug(1, "data element size, in: %d , out: %d ", inlen, outlen);
globals->datasize = sizeof(double) * globals->nbands;
/* count non-null cells */
globals->notnullcells = (long)globals->nrows * globals->ncols;
for (row = 0; row < globals->nrows; row++) {
for (n = 0; n < Ref.nfiles; n++) {
Rast_get_d_row(in_fd[n], inbuf[n], row);
}
for (col = 0; col < globals->ncols; col++) {
is_null = 0; /*Assume there is data */
for (n = 0; n < Ref.nfiles; n++) {
if (Rast_is_d_null_value(&inbuf[n][col])) {
is_null = 1;
}
}
if (is_null) {
globals->notnullcells--;
FLAG_SET(globals->null_flag, row, col);
}
}
}
G_verbose_message(_("Non-NULL cells: %ld"), globals->notnullcells);
if (globals->notnullcells < 2)
G_fatal_error(_("Insufficient number of non-NULL cells in current region"));
/* segment lib segment size */
srows = 64;
scols = 64;
nseg = manage_memory(srows, scols, globals);
/* create segment structures */
if (Segment_open
(&globals->bands_seg, G_tempfile(), globals->nrows, globals->ncols, srows,
scols, inlen, nseg) != 1)
G_fatal_error("Unable to create input temporary files");
if (Segment_open
(&globals->rid_seg, G_tempfile(), globals->nrows, globals->ncols, srows,
scols, outlen, nseg * 2) != 1)
G_fatal_error("Unable to create input temporary files");
/* load input bands to segment structure */
if (Ref.nfiles > 1)
G_message(_("Loading input bands..."));
else
G_message(_("Loading input band..."));
globals->bands_val = (double *)G_malloc(inlen);
globals->second_val = (double *)G_malloc(inlen);
/* initial segment ID */
s = 1;
globals->row_min = globals->nrows;
globals->row_max = 0;
globals->col_min = globals->ncols;
globals->col_max = 0;
for (row = 0; row < globals->nrows; row++) {
G_percent(row, globals->nrows, 4);
for (n = 0; n < Ref.nfiles; n++) {
Rast_get_d_row(in_fd[n], inbuf[n], row);
}
for (col = 0; col < globals->ncols; col++) {
is_null = 0; /*Assume there is data */
for (n = 0; n < Ref.nfiles; n++) {
globals->bands_val[n] = inbuf[n][col];
if (Rast_is_d_null_value(&inbuf[n][col])) {
is_null = 1;
}
else {
if (globals->weighted == FALSE)
/* scaled version */
globals->bands_val[n] = (inbuf[n][col] - min[n]) / (max[n] - min[n]);
}
}
if (Segment_put(&globals->bands_seg,
(void *)globals->bands_val, row, col) != 1)
G_fatal_error(_("Unable to write to temporary file"));
if (!is_null) {
if (!globals->seeds) {
/* sequentially number all cells with a unique segment ID */
id = s;
s++;
}
/* get min/max row/col to narrow the processing window */
if (globals->row_min > row)
globals->row_min = row;
if (globals->row_max < row)
globals->row_max = row;
if (globals->col_min > col)
globals->col_min = col;
if (globals->col_max < col)
globals->col_max = col;
}
else {
/* all input bands NULL */
Rast_set_c_null_value(&id, 1);
FLAG_SET(globals->null_flag, row, col);
}
if (!globals->seeds || is_null) {
if (Segment_put(&globals->rid_seg,
(void *)&id, row, col) != 1)
G_fatal_error(_("Unable to write to temporary file"));
}
}
}
G_percent(1, 1, 1);
G_debug(1, "nrows: %d, min row: %d, max row %d",
globals->nrows, globals->row_min, globals->row_max);
G_debug(1, "ncols: %d, min col: %d, max col %d",
globals->ncols, globals->col_min, globals->col_max);
globals->row_max++;
globals->col_max++;
globals->ncells = (long)(globals->row_max - globals->row_min) *
(globals->col_max - globals->col_min);
/* bounds/constraints */
Rast_set_c_null_value(&globals->upper_bound, 1);
Rast_set_c_null_value(&globals->lower_bound, 1);
if (globals->bounds_map != NULL) {
if (Segment_open
(&globals->bounds_seg, G_tempfile(), globals->nrows, globals->ncols,
srows, scols, sizeof(CELL), nseg) != TRUE)
G_fatal_error("Unable to create bounds temporary files");
if (Rast_read_range(globals->bounds_map, globals->bounds_mapset, &range) != 1)
G_fatal_error(_("No min/max found in raster map <%s>"),
globals->bounds_map);
Rast_get_range_min_max(&range, &globals->upper_bound,
&globals->lower_bound);
if (Rast_is_c_null_value(&globals->upper_bound) ||
Rast_is_c_null_value(&globals->lower_bound)) {
G_fatal_error(_("No min/max found in raster map <%s>"),
globals->bounds_map);
}
bounds_fd = Rast_open_old(globals->bounds_map, globals->bounds_mapset);
boundsbuf = Rast_allocate_c_buf();
for (row = 0; row < globals->nrows; row++) {
Rast_get_c_row(bounds_fd, boundsbuf, row);
for (col = 0; col < globals->ncols; col++) {
bounds_val = boundsbuf[col];
if (FLAG_GET(globals->null_flag, row, col)) {
Rast_set_c_null_value(&bounds_val, 1);
}
else {
if (!Rast_is_c_null_value(&bounds_val)) {
have_bounds = 1;
if (globals->lower_bound > bounds_val)
globals->lower_bound = bounds_val;
if (globals->upper_bound < bounds_val)
globals->upper_bound = bounds_val;
}
}
if (Segment_put(&globals->bounds_seg, &bounds_val, row, col) != 1)
G_fatal_error(_("Unable to write to temporary file"));
}
}
Rast_close(bounds_fd);
G_free(boundsbuf);
if (!have_bounds) {
G_warning(_("There are no boundary constraints in '%s'"), globals->bounds_map);
Rast_set_c_null_value(&globals->upper_bound, 1);
Rast_set_c_null_value(&globals->lower_bound, 1);
Segment_close(&globals->bounds_seg);
globals->bounds_map = NULL;
globals->bounds_mapset = NULL;
}
}
else {
G_debug(1, "no boundary constraint supplied.");
}
/* other info */
globals->candidate_count = 0; /* counter for remaining candidate pixels */
/* Free memory */
for (n = 0; n < Ref.nfiles; n++) {
G_free(inbuf[n]);
Rast_close(in_fd[n]);
}
globals->rs.sum = G_malloc(globals->datasize);
globals->rs.mean = G_malloc(globals->datasize);
globals->reg_tree = rgtree_create(globals->nbands, globals->datasize);
globals->n_regions = s - 1;
if (globals->seeds) {
load_seeds(globals, srows, scols, nseg);
}
G_debug(1, "Number of initial regions: %d", globals->n_regions);
G_free(inbuf);
G_free(in_fd);
G_free(fp_range);
G_free(min);
G_free(max);
return TRUE;
}
int main(int argc, char *argv[])
{
struct Cell_head cellhd;
/* buffer for in, tmp and out raster */
void *inrast_Rn, *inrast_g0;
void *inrast_z0m, *inrast_t0dem;
DCELL *outrast;
int nrows, ncols;
int row, col;
int row_wet, col_wet;
int row_dry, col_dry;
double m_row_wet, m_col_wet;
double m_row_dry, m_col_dry;
int infd_Rn, infd_g0;
int infd_z0m, infd_t0dem;
int outfd;
char *Rn, *g0;
char *z0m, *t0dem;
char *h0;
double ustar, ea;
struct History history;
struct GModule *module;
struct Option *input_Rn, *input_g0;
struct Option *input_z0m, *input_t0dem, *input_ustar;
struct Option *input_ea, *output;
struct Option *input_row_wet, *input_col_wet;
struct Option *input_row_dry, *input_col_dry;
struct Flag *flag2, *flag3;
/********************************/
double xp, yp;
double xmin, ymin;
double xmax, ymax;
double stepx, stepy;
double latitude, longitude;
int rowDry, colDry, rowWet, colWet;
/********************************/
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("imagery"));
G_add_keyword(_("energy balance"));
G_add_keyword(_("soil moisture"));
G_add_keyword(_("evaporative fraction"));
G_add_keyword(_("SEBAL"));
module->description = _("Computes sensible heat flux iteration SEBAL 01.");
/* Define different options */
input_Rn = G_define_standard_option(G_OPT_R_INPUT);
input_Rn->key = "netradiation";
input_Rn->description =
_("Name of instantaneous Net Radiation raster map [W/m2]");
input_g0 = G_define_standard_option(G_OPT_R_INPUT);
input_g0->key = "soilheatflux";
input_g0->description =
_("Name of instantaneous soil heat flux raster map [W/m2]");
input_z0m = G_define_standard_option(G_OPT_R_INPUT);
input_z0m->key = "aerodynresistance";
input_z0m->description =
_("Name of aerodynamic resistance to heat momentum raster map [s/m]");
input_t0dem = G_define_standard_option(G_OPT_R_INPUT);
input_t0dem->key = "temperaturemeansealevel";
input_t0dem->description =
_("Name of altitude corrected surface temperature raster map [K]");
input_ustar = G_define_option();
input_ustar->key = "frictionvelocitystar";
input_ustar->type = TYPE_DOUBLE;
input_ustar->required = YES;
input_ustar->gisprompt = "old,value";
input_ustar->answer = "0.32407";
input_ustar->description = _("Value of the height independent friction velocity (u*) [m/s]");
input_ustar->guisection = _("Parameters");
input_ea = G_define_option();
input_ea->key = "vapourpressureactual";
input_ea->type = TYPE_DOUBLE;
input_ea->required = YES;
input_ea->answer = "1.511";
input_ea->description = _("Value of the actual vapour pressure (e_act) [KPa]");
input_ea->guisection = _("Parameters");
input_row_wet = G_define_option();
input_row_wet->key = "row_wet_pixel";
input_row_wet->type = TYPE_DOUBLE;
input_row_wet->required = NO;
input_row_wet->description = _("Row value of the wet pixel");
input_row_wet->guisection = _("Parameters");
input_col_wet = G_define_option();
input_col_wet->key = "column_wet_pixel";
input_col_wet->type = TYPE_DOUBLE;
input_col_wet->required = NO;
input_col_wet->description = _("Column value of the wet pixel");
input_col_wet->guisection = _("Parameters");
input_row_dry = G_define_option();
input_row_dry->key = "row_dry_pixel";
input_row_dry->type = TYPE_DOUBLE;
input_row_dry->required = NO;
input_row_dry->description = _("Row value of the dry pixel");
input_row_dry->guisection = _("Parameters");
input_col_dry = G_define_option();
input_col_dry->key = "column_dry_pixel";
input_col_dry->type = TYPE_DOUBLE;
input_col_dry->required = NO;
input_col_dry->description = _("Column value of the dry pixel");
input_col_dry->guisection = _("Parameters");
output = G_define_standard_option(G_OPT_R_OUTPUT);
output->description = _("Name for output sensible heat flux raster map [W/m2]");
/* Define the different flags */
flag2 = G_define_flag();
flag2->key = 'a';
flag2->description = _("Automatic wet/dry pixel (careful!)");
flag3 = G_define_flag();
flag3->key = 'c';
flag3->description =
_("Dry/Wet pixels coordinates are in image projection, not row/col");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
/* get entered parameters */
Rn = input_Rn->answer;
g0 = input_g0->answer;
z0m = input_z0m->answer;
t0dem = input_t0dem->answer;
h0 = output->answer;
ustar = atof(input_ustar->answer);
ea = atof(input_ea->answer);
if(input_row_wet->answer&&
input_col_wet->answer&&
input_row_dry->answer&&
input_col_dry->answer){
m_row_wet = atof(input_row_wet->answer);
m_col_wet = atof(input_col_wet->answer);
m_row_dry = atof(input_row_dry->answer);
m_col_dry = atof(input_col_dry->answer);
}
if ((!input_row_wet->answer || !input_col_wet->answer ||
!input_row_dry->answer || !input_col_dry->answer) &&
!flag2->answer) {
G_fatal_error(_("Either auto-mode either wet/dry pixels coordinates should be provided!"));
}
if (flag3->answer) {
G_message(_("Manual wet/dry pixels in image coordinates"));
G_message(_("Wet Pixel=> x:%f y:%f"), m_col_wet, m_row_wet);
G_message(_("Dry Pixel=> x:%f y:%f"), m_col_dry, m_row_dry);
}
else {
if(flag2->answer)
G_message(_("Automatic mode selected"));
else {
G_message(_("Wet Pixel=> row:%.0f col:%.0f"), m_row_wet, m_col_wet);
G_message(_("Dry Pixel=> row:%.0f col:%.0f"), m_row_dry, m_col_dry);
}
}
/* check legal output name */
if (G_legal_filename(h0) < 0)
G_fatal_error(_("<%s> is an illegal name"), h0);
infd_Rn = Rast_open_old(Rn, "");
infd_g0 = Rast_open_old(g0, "");
infd_z0m = Rast_open_old(z0m, "");
infd_t0dem = Rast_open_old(t0dem, "");
Rast_get_cellhd(Rn, "", &cellhd);
Rast_get_cellhd(g0, "", &cellhd);
Rast_get_cellhd(z0m, "", &cellhd);
Rast_get_cellhd(t0dem, "", &cellhd);
/* Allocate input buffer */
inrast_Rn = Rast_allocate_d_buf();
inrast_g0 = Rast_allocate_d_buf();
inrast_z0m = Rast_allocate_d_buf();
inrast_t0dem = Rast_allocate_d_buf();
/***************************************************/
/* Setup pixel location variables */
/***************************************************/
stepx = cellhd.ew_res;
stepy = cellhd.ns_res;
xmin = cellhd.west;
xmax = cellhd.east;
ymin = cellhd.south;
ymax = cellhd.north;
nrows = Rast_window_rows();
ncols = Rast_window_cols();
/***************************************************/
/* Allocate output buffer */
/***************************************************/
outrast = Rast_allocate_d_buf();
outfd = Rast_open_new(h0, DCELL_TYPE);
/***************************************************/
/* Allocate memory for temporary images */
double **d_Roh, **d_Rah;
if ((d_Roh = G_alloc_matrix(nrows, ncols)) == NULL)
G_message("Unable to allocate memory for temporary d_Roh image");
if ((d_Rah = G_alloc_matrix(nrows, ncols)) == NULL)
G_message("Unable to allocate memory for temporary d_Rah image");
/***************************************************/
/* MANUAL T0DEM WET/DRY PIXELS */
DCELL d_Rn_dry,d_g0_dry;
DCELL d_t0dem_dry,d_t0dem_wet;
if (flag2->answer) {
/* Process tempk min / max pixels */
/* Internal use only */
DCELL d_Rn_wet,d_g0_wet;
DCELL d_Rn,d_g0,d_h0;
DCELL t0dem_min,t0dem_max;
/*********************/
for (row = 0; row < nrows; row++) {
DCELL d_t0dem;
G_percent(row, nrows, 2);
Rast_get_d_row(infd_t0dem,inrast_t0dem,row);
Rast_get_d_row(infd_Rn,inrast_Rn,row);
Rast_get_d_row(infd_g0,inrast_g0,row);
/*process the data */
for (col = 0; col < ncols; col++) {
d_t0dem = ((DCELL *) inrast_t0dem)[col];
d_Rn = ((DCELL *) inrast_Rn)[col];
d_g0 = ((DCELL *) inrast_g0)[col];
if (Rast_is_d_null_value(&d_t0dem) ||
Rast_is_d_null_value(&d_Rn) ||
Rast_is_d_null_value(&d_g0)) {
/* do nothing */
}
else {
if (d_t0dem <= 250.0) {
/* do nothing */
}
else {
d_h0 = d_Rn - d_g0;
if (d_t0dem < t0dem_min &&
d_Rn > 0.0 && d_g0 > 0.0 && d_h0 > 0.0 &&
d_h0 < 100.0) {
t0dem_min = d_t0dem;
d_t0dem_wet = d_t0dem;
d_Rn_wet = d_Rn;
d_g0_wet = d_g0;
m_col_wet = col;
m_row_wet = row;
}
if (d_t0dem > t0dem_max &&
d_Rn > 0.0 && d_g0 > 0.0 && d_h0 > 100.0 &&
d_h0 < 500.0) {
t0dem_max = d_t0dem;
d_t0dem_dry = d_t0dem;
d_Rn_dry = d_Rn;
d_g0_dry = d_g0;
m_col_dry = col;
m_row_dry = row;
}
}
}
}
}
G_message("row_wet=%d\tcol_wet=%d", row_wet, col_wet);
G_message("row_dry=%d\tcol_dry=%d", row_dry, col_dry);
G_message("g0_wet=%f", d_g0_wet);
G_message("Rn_wet=%f", d_Rn_wet);
G_message("LE_wet=%f", d_Rn_wet - d_g0_wet);
G_message("t0dem_dry=%f", d_t0dem_dry);
G_message("rnet_dry=%f", d_Rn_dry);
G_message("g0_dry=%f", d_g0_dry);
G_message("h0_dry=%f", d_Rn_dry - d_g0_dry);
}/* END OF FLAG2 */
G_message("Passed here");
/* MANUAL T0DEM WET/DRY PIXELS */
/*DRY PIXEL */
if (flag3->answer) {
/*Calculate coordinates of row/col from projected ones */
row = (int)((ymax - m_row_dry) / (double)stepy);
col = (int)((m_col_dry - xmin) / (double)stepx);
G_message("Dry Pixel | row:%i col:%i", row, col);
}
else {
row = (int)m_row_dry;
col = (int)m_col_dry;
G_message("Dry Pixel | row:%i col:%i", row, col);
}
rowDry = row;
colDry = col;
Rast_get_d_row(infd_Rn, inrast_Rn, row);
Rast_get_d_row(infd_g0, inrast_g0, row);
Rast_get_d_row(infd_t0dem, inrast_t0dem, row);
d_Rn_dry = ((DCELL *) inrast_Rn)[col];
d_g0_dry = ((DCELL *) inrast_g0)[col];
d_t0dem_dry = ((DCELL *) inrast_t0dem)[col];
/*WET PIXEL */
if (flag3->answer) {
/*Calculate coordinates of row/col from projected ones */
row = (int)((ymax - m_row_wet) / (double)stepy);
col = (int)((m_col_wet - xmin) / (double)stepx);
G_message("Wet Pixel | row:%i col:%i", row, col);
}
else {
row = m_row_wet;
col = m_col_wet;
G_message("Wet Pixel | row:%i col:%i", row, col);
}
rowWet = row;
colWet = col;
Rast_get_d_row(infd_t0dem, inrast_t0dem, row);
d_t0dem_wet = ((DCELL *) inrast_t0dem)[col];
/* END OF MANUAL WET/DRY PIXELS */
double h_dry;
h_dry = d_Rn_dry - d_g0_dry;
G_message("h_dry = %f", h_dry);
G_message("t0dem_dry = %f", d_t0dem_dry);
G_message("t0dem_wet = %f", d_t0dem_wet);
DCELL d_rah_dry;
DCELL d_roh_dry;
/* INITIALIZATION */
for (row = 0; row < nrows; row++) {
DCELL d_t0dem,d_z0m;
DCELL d_rah1,d_roh1;
DCELL d_u5;
G_percent(row, nrows, 2);
/* read a line input maps into buffers */
Rast_get_d_row(infd_z0m, inrast_z0m, row);
Rast_get_d_row(infd_t0dem, inrast_t0dem,row);
/* read every cell in the line buffers */
for (col = 0; col < ncols; col++) {
d_z0m = ((DCELL *) inrast_z0m)[col];
d_t0dem = ((DCELL *) inrast_t0dem)[col];
if (Rast_is_d_null_value(&d_t0dem) || Rast_is_d_null_value(&d_z0m)) {
/* do nothing */
d_Roh[row][col] = -999.9;
d_Rah[row][col] = -999.9;
}
else {
d_u5 = (ustar / 0.41) * log(5 / d_z0m);
d_rah1=(1/(d_u5*pow(0.41,2)))*log(5/d_z0m)*log(5/(d_z0m*0.1));
d_roh1=((998-ea)/(d_t0dem*2.87))+(ea/(d_t0dem*4.61));
if (d_roh1 > 5) d_roh1 = 1.0;
else d_roh1=((1000-4.65)/(d_t0dem*2.87))+(4.65/(d_t0dem*4.61));
if (row == rowDry && col == colDry) { /*collect dry pix info */
d_rah_dry = d_rah1;
d_roh_dry = d_roh1;
G_message("d_rah_dry=%f d_roh_dry=%f",d_rah_dry,d_roh_dry);
}
d_Roh[row][col] = d_roh1;
d_Rah[row][col] = d_rah1;
}
}
}
DCELL d_dT_dry;
/*Calculate dT_dry */
d_dT_dry = (h_dry * d_rah_dry) / (1004 * d_roh_dry);
double a, b;
/*Calculate coefficients for next dT equation */
/*a = 1.0/ ((d_dT_dry-0.0) / (d_t0dem_dry-d_t0dem_wet)); */
/*b = ( a * d_t0dem_wet ) * (-1.0); */
double sumx = d_t0dem_wet + d_t0dem_dry;
double sumy = d_dT_dry + 0.0;
double sumx2 = pow(d_t0dem_wet, 2) + pow(d_t0dem_dry, 2);
double sumxy = (d_t0dem_wet * 0.0) + (d_t0dem_dry * d_dT_dry);
a = (sumxy - ((sumx * sumy) / 2.0)) / (sumx2 - (pow(sumx, 2) / 2.0));
b = (sumy - (a * sumx)) / 2.0;
G_message("d_dT_dry=%f", d_dT_dry);
G_message("dT1=%f * t0dem + (%f)", a, b);
DCELL d_h_dry;
/* ITERATION 1 */
for (row = 0; row < nrows; row++) {
DCELL d_t0dem,d_z0m;
DCELL d_h1,d_rah1,d_rah2,d_roh1;
DCELL d_L,d_x,d_psih,d_psim;
DCELL d_u5;
G_percent(row, nrows, 2);
/* read a line input maps into buffers */
Rast_get_d_row(infd_z0m, inrast_z0m, row);
Rast_get_d_row(infd_t0dem, inrast_t0dem,row);
/* read every cell in the line buffers */
for (col = 0; col < ncols; col++) {
d_z0m = ((DCELL *) inrast_z0m)[col];
d_t0dem = ((DCELL *) inrast_t0dem)[col];
d_rah1 = d_Rah[row][col];
d_roh1 = d_Roh[row][col];
if (Rast_is_d_null_value(&d_t0dem) || Rast_is_d_null_value(&d_z0m)) {
/* do nothing */
}
else {
if (d_rah1 < 1.0)
d_h1 = 0.0;
else
d_h1 = (1004 * d_roh1) * (a * d_t0dem + b) / d_rah1;
d_L =-1004*d_roh1*pow(ustar,3)*d_t0dem/(d_h1*9.81*0.41);
d_x = pow((1-16*(5/d_L)),0.25);
d_psim =2*log((1+d_x)/2)+log((1+pow(d_x,2))/2)-2*atan(d_x)+0.5*M_PI;
d_psih =2*log((1+pow(d_x,2))/2);
d_u5 =(ustar/0.41)*log(5/d_z0m);
d_rah2 = (1/(d_u5*pow(0.41,2)))*log((5/d_z0m)-d_psim)
*log((5/(d_z0m*0.1))-d_psih);
if (row == rowDry && col == colDry) {/*collect dry pix info */
d_rah_dry = d_rah2;
d_h_dry = d_h1;
}
d_Rah[row][col] = d_rah1;
}
}
}
/*Calculate dT_dry */
d_dT_dry = (d_h_dry * d_rah_dry) / (1004 * d_roh_dry);
/*Calculate coefficients for next dT equation */
/* a = (d_dT_dry-0)/(d_t0dem_dry-d_t0dem_wet); */
/* b = (-1.0) * ( a * d_t0dem_wet ); */
/* G_message("d_dT_dry=%f",d_dT_dry); */
/* G_message("dT2=%f * t0dem + (%f)", a, b); */
sumx = d_t0dem_wet + d_t0dem_dry;
sumy = d_dT_dry + 0.0;
sumx2 = pow(d_t0dem_wet, 2) + pow(d_t0dem_dry, 2);
sumxy = (d_t0dem_wet * 0.0) + (d_t0dem_dry * d_dT_dry);
a = (sumxy - ((sumx * sumy) / 2.0)) / (sumx2 - (pow(sumx, 2) / 2.0));
b = (sumy - (a * sumx)) / 2.0;
G_message("d_dT_dry=%f", d_dT_dry);
G_message("dT1=%f * t0dem + (%f)", a, b);
/* ITERATION 2 */
/***************************************************/
/***************************************************/
for (row = 0; row < nrows; row++) {
DCELL d_t0dem;
DCELL d_z0m;
DCELL d_rah2;
DCELL d_rah3;
DCELL d_roh1;
DCELL d_h2;
DCELL d_L;
DCELL d_x;
DCELL d_psih;
DCELL d_psim;
DCELL d_u5;
G_percent(row, nrows, 2);
/* read a line input maps into buffers */
Rast_get_d_row(infd_z0m,inrast_z0m,row);
Rast_get_d_row(infd_t0dem,inrast_t0dem,row);
/* read every cell in the line buffers */
for (col = 0; col < ncols; col++) {
d_z0m = ((DCELL *) inrast_z0m)[col];
d_t0dem = ((DCELL *) inrast_t0dem)[col];
d_rah2 = d_Rah[row][col];
d_roh1 = d_Roh[row][col];
if (Rast_is_d_null_value(&d_t0dem) || Rast_is_d_null_value(&d_z0m)) {
/* do nothing */
}
else {
if (d_rah2 < 1.0) {
d_h2 = 0.0;
}
else {
d_h2 =(1004*d_roh1)*(a*d_t0dem+b)/d_rah2;
}
d_L =-1004*d_roh1*pow(ustar,3)*d_t0dem/(d_h2*9.81*0.41);
d_x = pow((1 - 16 * (5 / d_L)), 0.25);
d_psim =2*log((1+d_x)/2)+log((1+pow(d_x,2))/2)-
2*atan(d_x)+0.5*M_PI;
d_psih =2*log((1+pow(d_x,2))/2);
d_u5 =(ustar/0.41)*log(5/d_z0m);
d_rah3=(1/(d_u5*pow(0.41,2)))*log((5/d_z0m)-d_psim)*
log((5/(d_z0m*0.1))-d_psih);
if (row == rowDry && col == colDry) {/*collect dry pix info */
d_rah_dry = d_rah2;
d_h_dry = d_h2;
}
d_Rah[row][col] = d_rah2;
}
}
}
/*Calculate dT_dry */
d_dT_dry = (d_h_dry * d_rah_dry) / (1004 * d_roh_dry);
/*Calculate coefficients for next dT equation */
/* a = (d_dT_dry-0)/(d_t0dem_dry-d_t0dem_wet); */
/* b = (-1.0) * ( a * d_t0dem_wet ); */
/* G_message("d_dT_dry=%f",d_dT_dry); */
/* G_message("dT3=%f * t0dem + (%f)", a, b); */
sumx = d_t0dem_wet + d_t0dem_dry;
sumy = d_dT_dry + 0.0;
sumx2 = pow(d_t0dem_wet, 2) + pow(d_t0dem_dry, 2);
sumxy = (d_t0dem_wet * 0.0) + (d_t0dem_dry * d_dT_dry);
a = (sumxy - ((sumx * sumy) / 2.0)) / (sumx2 - (pow(sumx, 2) / 2.0));
b = (sumy - (a * sumx)) / 2.0;
G_message("d_dT_dry=%f", d_dT_dry);
G_message("dT1=%f * t0dem + (%f)", a, b);
/* ITERATION 3 */
/***************************************************/
/***************************************************/
for (row = 0; row < nrows; row++) {
DCELL d_t0dem;
DCELL d_z0m;
DCELL d_rah3;
DCELL d_roh1;
DCELL d_h3;
DCELL d_L;
DCELL d_x;
DCELL d_psih;
DCELL d_psim;
DCELL d; /* Output pixel */
G_percent(row, nrows, 2);
/* read a line input maps into buffers */
Rast_get_d_row(infd_z0m, inrast_z0m, row);
Rast_get_d_row(infd_t0dem,inrast_t0dem,row);
/* read every cell in the line buffers */
for (col = 0; col < ncols; col++) {
d_z0m = ((DCELL *) inrast_z0m)[col];
d_t0dem = ((DCELL *) inrast_t0dem)[col];
d_rah3 = d_Rah[row][col];
d_roh1 = d_Roh[row][col];
if (Rast_is_d_null_value(&d_t0dem) || Rast_is_d_null_value(&d_z0m)) {
Rast_set_d_null_value(&outrast[col], 1);
}
else {
if (d_rah3 < 1.0) {
d_h3 = 0.0;
}
else {
d_h3 = (1004 * d_roh1) * (a * d_t0dem + b) / d_rah3;
}
if (d_h3 < 0 && d_h3 > -50) {
d_h3 = 0.0;
}
if (d_h3 < -50 || d_h3 > 1000) {
Rast_set_d_null_value(&outrast[col], 1);
}
outrast[col] = d_h3;
}
}
Rast_put_d_row(outfd, outrast);
}
G_free(inrast_z0m);
Rast_close(infd_z0m);
G_free(inrast_t0dem);
Rast_close(infd_t0dem);
G_free(outrast);
Rast_close(outfd);
/* add command line incantation to history file */
Rast_short_history(h0, "raster", &history);
Rast_command_history(&history);
Rast_write_history(h0, &history);
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
/* Global variable & function declarations */
struct GModule *module;
struct {
struct Option *orig, *real, *imag;
} opt;
const char *Cellmap_real, *Cellmap_imag;
const char *Cellmap_orig;
int realfd, imagfd, outputfd, maskfd; /* the input and output file descriptors */
struct Cell_head realhead, imaghead;
DCELL *cell_real, *cell_imag;
CELL *maskbuf;
int i, j; /* Loop control variables */
int rows, cols; /* number of rows & columns */
long totsize; /* Total number of data points */
double (*data)[2]; /* Data structure containing real & complex values of FFT */
G_gisinit(argv[0]);
/* Set description */
module = G_define_module();
G_add_keyword(_("imagery"));
G_add_keyword(_("transformation"));
G_add_keyword(_("Fast Fourier Transform"));
module->description =
_("Inverse Fast Fourier Transform (IFFT) for image processing.");
/* define options */
opt.real = G_define_standard_option(G_OPT_R_INPUT);
opt.real->key = "real";
opt.real->description = _("Name of input raster map (image fft, real part)");
opt.imag = G_define_standard_option(G_OPT_R_INPUT);
opt.imag->key = "imaginary";
opt.imag->description = _("Name of input raster map (image fft, imaginary part");
opt.orig = G_define_standard_option(G_OPT_R_OUTPUT);
opt.orig->description = _("Name for output raster map");
/*call parser */
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
Cellmap_real = opt.real->answer;
Cellmap_imag = opt.imag->answer;
Cellmap_orig = opt.orig->answer;
/* get and compare the original window data */
Rast_get_cellhd(Cellmap_real, "", &realhead);
Rast_get_cellhd(Cellmap_imag, "", &imaghead);
if (realhead.proj != imaghead.proj ||
realhead.zone != imaghead.zone ||
realhead.north != imaghead.north ||
realhead.south != imaghead.south ||
realhead.east != imaghead.east ||
realhead.west != imaghead.west ||
realhead.ew_res != imaghead.ew_res ||
realhead.ns_res != imaghead.ns_res)
G_fatal_error(_("The real and imaginary original windows did not match"));
Rast_set_window(&realhead); /* set the window to the whole cell map */
/* open input raster map */
realfd = Rast_open_old(Cellmap_real, "");
imagfd = Rast_open_old(Cellmap_imag, "");
/* get the rows and columns in the current window */
rows = Rast_window_rows();
cols = Rast_window_cols();
totsize = rows * cols;
/* Allocate appropriate memory for the structure containing
the real and complex components of the FFT. DATA[0] will
contain the real, and DATA[1] the complex component.
*/
data = G_malloc(rows * cols * 2 * sizeof(double));
/* allocate the space for one row of cell map data */
cell_real = Rast_allocate_d_buf();
cell_imag = Rast_allocate_d_buf();
#define C(i, j) ((i) * cols + (j))
/* Read in cell map values */
G_message(_("Reading raster maps..."));
for (i = 0; i < rows; i++) {
Rast_get_d_row(realfd, cell_real, i);
Rast_get_d_row(imagfd, cell_imag, i);
for (j = 0; j < cols; j++) {
data[C(i, j)][0] = cell_real[j];
data[C(i, j)][1] = cell_imag[j];
}
G_percent(i+1, rows, 2);
}
/* close input cell maps */
Rast_close(realfd);
Rast_close(imagfd);
/* Read in cell map values */
G_message(_("Masking raster maps..."));
maskfd = Rast_maskfd();
if (maskfd >= 0) {
maskbuf = Rast_allocate_c_buf();
for (i = 0; i < rows; i++) {
Rast_get_c_row(maskfd, maskbuf, i);
for (j = 0; j < cols; j++) {
if (maskbuf[j] == 0) {
data[C(i, j)][0] = 0.0;
data[C(i, j)][1] = 0.0;
}
}
G_percent(i+1, rows, 2);
}
Rast_close(maskfd);
G_free(maskbuf);
}
#define SWAP1(a, b) \
do { \
double temp = (a); \
(a) = (b); \
(b) = temp; \
} while (0)
#define SWAP2(a, b) \
do { \
SWAP1(data[(a)][0], data[(b)][0]); \
SWAP1(data[(a)][1], data[(b)][1]); \
} while (0)
/* rotate the data array for standard display */
G_message(_("Rotating data..."));
for (i = 0; i < rows; i++)
for (j = 0; j < cols / 2; j++)
SWAP2(C(i, j), C(i, j + cols / 2));
for (i = 0; i < rows / 2; i++)
for (j = 0; j < cols; j++)
SWAP2(C(i, j), C(i + rows / 2, j));
/* perform inverse FFT */
G_message(_("Starting Inverse FFT..."));
fft2(1, data, totsize, cols, rows);
/* open the output cell map */
outputfd = Rast_open_fp_new(Cellmap_orig);
/* Write out result to a new cell map */
G_message(_("Writing raster map <%s>..."),
Cellmap_orig);
for (i = 0; i < rows; i++) {
for (j = 0; j < cols; j++)
cell_real[j] = data[C(i, j)][0];
Rast_put_d_row(outputfd, cell_real);
G_percent(i+1, rows, 2);
}
Rast_close(outputfd);
G_free(cell_real);
G_free(cell_imag);
fft_colors(Cellmap_orig);
/* Release memory resources */
G_free(data);
G_done_msg(" ");
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
struct Cell_head cellhd;
/* buffer for in out raster */
DCELL *inrast_T, *inrast_RH, *inrast_u2;
DCELL *inrast_Rn, *inrast_DEM, *inrast_hc, *outrast;
char *EPo;
int nrows, ncols;
int row, col;
int infd_T, infd_RH, infd_u2, infd_Rn, infd_DEM, infd_hc;
int outfd;
char *T, *RH, *u2, *Rn, *DEM, *hc;
DCELL d_T, d_RH, d_u2, d_Rn, d_Z, d_hc;
DCELL d_EPo;
int d_night;
struct History history;
struct GModule *module;
struct Option *input_DEM, *input_T, *input_RH;
struct Option *input_u2, *input_Rn, *input_hc, *output;
struct Flag *day, *zero;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("imagery"));
G_add_keyword(_("evapotranspiration"));
module->description =
_("Computes potential evapotranspiration calculation with hourly Penman-Monteith.");
/* Define different options */
input_DEM = G_define_standard_option(G_OPT_R_ELEV);
input_DEM->description = _("Name of input elevation raster map [m a.s.l.]");
input_T = G_define_standard_option(G_OPT_R_INPUT);
input_T->key = "temperature";
input_T->description = _("Name of input temperature raster map [C]");
input_RH = G_define_standard_option(G_OPT_R_INPUT);
input_RH->key = "relativehumidity";
input_RH->description = _("Name of input relative humidity raster map [%]");
input_u2 = G_define_standard_option(G_OPT_R_INPUT);
input_u2->key = "windspeed";
input_u2->description = _("Name of input wind speed raster map [m/s]");
input_Rn = G_define_standard_option(G_OPT_R_INPUT);
input_Rn->key = "netradiation";
input_Rn->description =
_("Name of input net solar radiation raster map [MJ/m2/h]");
input_hc = G_define_standard_option(G_OPT_R_INPUT);
input_hc->key = "cropheight";
input_hc->description = _("Name of input crop height raster map [m]");
output = G_define_standard_option(G_OPT_R_OUTPUT);
_("Name for output raster map [mm/h]");
zero = G_define_flag();
zero->key = 'z';
zero->description = _("Set negative evapotranspiration to zero");
day = G_define_flag();
day->key = 'n';
day->description = _("Use Night-time");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
/* get entered parameters */
T = input_T->answer;
RH = input_RH->answer;
u2 = input_u2->answer;
Rn = input_Rn->answer;
EPo = output->answer;
DEM = input_DEM->answer;
hc = input_hc->answer;
if (day->answer) {
d_night = TRUE;
}
else {
d_night = FALSE;
}
infd_T = Rast_open_old(T, "");
infd_RH = Rast_open_old(RH, "");
infd_u2 = Rast_open_old(u2, "");
infd_Rn = Rast_open_old(Rn, "");
infd_DEM = Rast_open_old(DEM, "");
infd_hc = Rast_open_old(hc, "");
Rast_get_cellhd(T, "", &cellhd);
Rast_get_cellhd(RH, "", &cellhd);
Rast_get_cellhd(u2, "", &cellhd);
Rast_get_cellhd(Rn, "", &cellhd);
Rast_get_cellhd(DEM, "", &cellhd);
Rast_get_cellhd(hc, "", &cellhd);
/* Allocate input buffer */
inrast_T = Rast_allocate_d_buf();
inrast_RH = Rast_allocate_d_buf();
inrast_u2 = Rast_allocate_d_buf();
inrast_Rn = Rast_allocate_d_buf();
inrast_DEM = Rast_allocate_d_buf();
inrast_hc = Rast_allocate_d_buf();
/* Allocate output buffer */
nrows = Rast_window_rows();
ncols = Rast_window_cols();
outrast = Rast_allocate_d_buf();
outfd = Rast_open_new(EPo, DCELL_TYPE);
for (row = 0; row < nrows; row++) {
/* read a line input maps into buffers */
Rast_get_d_row(infd_T, inrast_T, row);
Rast_get_d_row(infd_RH, inrast_RH, row);
Rast_get_d_row(infd_u2, inrast_u2, row);
Rast_get_d_row(infd_Rn, inrast_Rn, row);
Rast_get_d_row(infd_DEM, inrast_DEM, row);
Rast_get_d_row(infd_hc, inrast_hc, row);
/* read every cell in the line buffers */
for (col = 0; col < ncols; col++) {
d_T = ((DCELL *) inrast_T)[col];
d_RH = ((DCELL *) inrast_RH)[col];
d_u2 = ((DCELL *) inrast_u2)[col];
d_Rn = ((DCELL *) inrast_Rn)[col];
d_Z = ((DCELL *) inrast_DEM)[col];
d_hc = ((DCELL *) inrast_hc)[col];
/* calculate evapotranspiration */
if (d_hc < 0) {
/* calculate evaporation */
d_EPo =
calc_openwaterETp(d_T, d_Z, d_u2, d_Rn, d_night, d_RH,
d_hc);
}
else {
/* calculate evapotranspiration */
d_EPo = calc_ETp(d_T, d_Z, d_u2, d_Rn, d_night, d_RH, d_hc);
}
if (zero->answer && d_EPo < 0)
d_EPo = 0;
((DCELL *) outrast)[col] = d_EPo;
}
Rast_put_d_row(outfd, outrast);
}
G_free(inrast_T);
G_free(inrast_RH);
G_free(inrast_u2);
G_free(inrast_Rn);
G_free(inrast_DEM);
G_free(inrast_hc);
G_free(outrast);
Rast_close(infd_T);
Rast_close(infd_RH);
Rast_close(infd_u2);
Rast_close(infd_Rn);
Rast_close(infd_DEM);
Rast_close(infd_hc);
Rast_close(outfd);
/* add command line incantation to history file */
Rast_short_history(EPo, "raster", &history);
Rast_command_history(&history);
Rast_write_history(EPo, &history);
exit(EXIT_SUCCESS);
}
int calculateD(int fd, struct area_entry *ad, double *result)
{
DCELL *buf, *buf_sup, *buf_null;
DCELL corrCell, precCell, supCell;
long npatch, area;
long pid, old_pid, new_pid, *pid_corr, *pid_sup, *ltmp;
struct pst *pst;
long nalloc, incr;
int i, j, k;
int connected;
int mask_fd, *mask_buf, *mask_sup, *mask_tmp, masked;
struct Cell_head hd;
Rast_get_window(&hd);
buf_null = Rast_allocate_d_buf();
Rast_set_d_null_value(buf_null, Rast_window_cols());
buf_sup = buf_null;
/* initialize patch ids */
pid_corr = G_malloc(Rast_window_cols() * sizeof(long));
pid_sup = G_malloc(Rast_window_cols() * sizeof(long));
for (j = 0; j < Rast_window_cols(); j++) {
pid_corr[j] = 0;
pid_sup[j] = 0;
}
/* open mask if needed */
mask_fd = -1;
mask_buf = mask_sup = NULL;
masked = FALSE;
if (ad->mask == 1) {
if ((mask_fd = open(ad->mask_name, O_RDONLY, 0755)) < 0)
return RLI_ERRORE;
mask_buf = G_malloc(ad->cl * sizeof(int));
if (mask_buf == NULL) {
G_fatal_error("malloc mask_buf failed");
return RLI_ERRORE;
}
mask_sup = G_malloc(ad->cl * sizeof(int));
if (mask_sup == NULL) {
G_fatal_error("malloc mask_buf failed");
return RLI_ERRORE;
}
for (j = 0; j < ad->cl; j++)
mask_buf[j] = 0;
masked = TRUE;
}
/* calculate number of patches */
npatch = 0;
area = 0;
pid = 0;
/* patch size and type */
incr = 1024;
if (incr > ad->rl)
incr = ad->rl;
if (incr > ad->cl)
incr = ad->cl;
if (incr < 2)
incr = 2;
nalloc = incr;
pst = G_malloc(nalloc * sizeof(struct pst));
for (k = 0; k < nalloc; k++) {
pst[k].count = 0;
}
for (i = 0; i < ad->rl; i++) {
buf = RLI_get_dcell_raster_row(fd, i + ad->y, ad);
if (i > 0) {
buf_sup = RLI_get_dcell_raster_row(fd, i - 1 + ad->y, ad);
}
if (masked) {
mask_tmp = mask_sup;
mask_sup = mask_buf;
mask_buf = mask_tmp;
if (read(mask_fd, mask_buf, (ad->cl * sizeof(int))) < 0)
return 0;
}
ltmp = pid_sup;
pid_sup = pid_corr;
pid_corr = ltmp;
Rast_set_d_null_value(&precCell, 1);
connected = 0;
for (j = 0; j < ad->cl; j++) {
pid_corr[j + ad->x] = 0;
corrCell = buf[j + ad->x];
if (masked && (mask_buf[j] == 0)) {
Rast_set_d_null_value(&corrCell, 1);
}
if (Rast_is_d_null_value(&corrCell)) {
connected = 0;
precCell = corrCell;
continue;
}
area++;
supCell = buf_sup[j + ad->x];
if (masked && (mask_sup[j] == 0)) {
Rast_set_d_null_value(&supCell, 1);
}
if (!Rast_is_d_null_value(&precCell) && corrCell == precCell) {
pid_corr[j + ad->x] = pid_corr[j - 1 + ad->x];
connected = 1;
pst[pid_corr[j + ad->x]].count++;
}
else {
connected = 0;
}
if (!Rast_is_d_null_value(&supCell) && corrCell == supCell) {
if (pid_corr[j + ad->x] != pid_sup[j + ad->x]) {
/* connect or merge */
/* after r.clump */
if (connected) {
npatch--;
if (npatch == 0) {
G_fatal_error("npatch == 0 at row %d, col %d", i, j);
}
}
old_pid = pid_corr[j + ad->x];
new_pid = pid_sup[j + ad->x];
pid_corr[j + ad->x] = new_pid;
if (old_pid > 0) {
/* merge */
/* update left side of the current row */
for (k = 0; k < j; k++) {
if (pid_corr[k + ad->x] == old_pid)
pid_corr[k + ad->x] = new_pid;
}
/* update right side of the previous row */
for (k = j + 1; k < ad->cl; k++) {
if (pid_sup[k + ad->x] == old_pid)
pid_sup[k + ad->x] = new_pid;
}
pst[new_pid].count += pst[old_pid].count;
pst[old_pid].count = 0;
if (old_pid == pid)
pid--;
}
else {
pst[new_pid].count++;
}
}
connected = 1;
}
if (!connected) {
/* start new patch */
npatch++;
pid++;
pid_corr[j + ad->x] = pid;
if (pid >= nalloc) {
pst = (struct pst *)G_realloc(pst, (pid + incr) * sizeof(struct pst));
for (k = nalloc; k < pid + incr; k++)
pst[k].count = 0;
nalloc = pid + incr;
}
pst[pid].count = 1;
pst[pid].type.t = CELL_TYPE;
pst[pid].type.val.c = corrCell;
}
precCell = corrCell;
}
}
if (npatch > 0) {
double EW_DIST1, EW_DIST2, NS_DIST1, NS_DIST2;
double area_p;
double cell_size_m;
double min, max;
/* calculate distance */
G_begin_distance_calculations();
/* EW Dist at North edge */
EW_DIST1 = G_distance(hd.east, hd.north, hd.west, hd.north);
/* EW Dist at South Edge */
EW_DIST2 = G_distance(hd.east, hd.south, hd.west, hd.south);
/* NS Dist at East edge */
NS_DIST1 = G_distance(hd.east, hd.north, hd.east, hd.south);
/* NS Dist at West edge */
NS_DIST2 = G_distance(hd.west, hd.north, hd.west, hd.south);
cell_size_m = (((EW_DIST1 + EW_DIST2) / 2) / hd.cols) *
(((NS_DIST1 + NS_DIST2) / 2) / hd.rows);
/* get min and max patch size */
min = 1.0 / 0.0; /* inf */
max = -1.0 / 0.0; /* -inf */
for (old_pid = 1; old_pid <= pid; old_pid++) {
if (pst[old_pid].count > 0) {
area_p = cell_size_m * pst[old_pid].count / 10000;
if (min > area_p)
min = area_p;
if (max < area_p)
max = area_p;
}
}
*result = max - min;
}
else
Rast_set_d_null_value(result, 1);
if (masked) {
close(mask_fd);
G_free(mask_buf);
G_free(mask_sup);
}
G_free(buf_null);
G_free(pid_corr);
G_free(pid_sup);
G_free(pst);
return RLI_OK;
}
/*!
* \brief Extract a cell value from raster map (cubic interpolation).
*
* Extract a cell value from raster map at given northing and easting
* with a sampled 3x3 window using a cubic interpolation.
*
* \param fd file descriptor
* \param window region settings
* \param cats categories
* \param north northing position
* \param east easting position
* \param usedesc flag to scan category label
*
* \return cell value at given position
*/
DCELL Rast_get_sample_cubic(int fd,
const struct Cell_head * window,
struct Categories * cats,
double north, double east, int usedesc)
{
int i, j, row, col;
double grid[4][4];
DCELL *rows[4];
double frow, fcol, trow, tcol;
DCELL result;
for (i = 0; i < 4; i++)
rows[i] = Rast_allocate_d_buf();
frow = Rast_northing_to_row(north, window);
fcol = Rast_easting_to_col(east, window);
/* convert northing and easting to row and col, resp */
row = (int)floor(frow - 1.5);
col = (int)floor(fcol - 1.5);
trow = frow - row - 1.5;
tcol = fcol - col - 1.5;
if (row < 0 || row + 3 >= Rast_window_rows() ||
col < 0 || col + 3 >= Rast_window_cols()) {
Rast_set_d_null_value(&result, 1);
goto done;
}
for (i = 0; i < 4; i++)
Rast_get_d_row(fd, rows[i], row + i);
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
if (Rast_is_d_null_value(&rows[i][col + j])) {
Rast_set_d_null_value(&result, 1);
goto done;
}
/*
* now were ready to do cubic interpolation over
* arow[col], arow[col+1], arow[col+2], arow[col+3],
* brow[col], brow[col+1], brow[col+2], brow[col+3],
* crow[col], crow[col+1], crow[col+2], crow[col+3],
* drow[col], drow[col+1], drow[col+2], drow[col+3],
*/
if (usedesc) {
char *buf;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
G_squeeze(buf =
Rast_get_c_cat((CELL *) & (rows[i][col + j]),
cats));
grid[i][j] = scancatlabel(buf);
}
}
}
else {
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
grid[i][j] = rows[i][col + j];
}
result = Rast_interp_bicubic(tcol, trow,
grid[0][0], grid[0][1], grid[0][2],
grid[0][3], grid[1][0], grid[1][1],
grid[1][2], grid[1][3], grid[2][0],
grid[2][1], grid[2][2], grid[2][3],
grid[3][0], grid[3][1], grid[3][2],
grid[3][3]);
done:
for (i = 0; i < 4; i++)
G_free(rows[i]);
return result;
}
/* ************************************************************************* */
void g3d_to_raster(void *map, RASTER3D_Region region, int *fd)
{
DCELL d1 = 0;
FCELL f1 = 0;
int x, y, z;
int rows, cols, depths, typeIntern, pos = 0;
FCELL *fcell = NULL;
DCELL *dcell = NULL;
rows = region.rows;
cols = region.cols;
depths = region.depths;
G_debug(2, "g3d_to_raster: Writing %i raster maps with %i rows %i cols.",
depths, rows, cols);
typeIntern = Rast3d_tile_type_map(map);
if (typeIntern == FCELL_TYPE)
fcell = Rast_allocate_f_buf();
else if (typeIntern == DCELL_TYPE)
dcell = Rast_allocate_d_buf();
pos = 0;
/*Every Rastermap */
for (z = 0; z < depths; z++) { /*From the bottom to the top */
G_debug(2, "Writing raster map %d of %d", z + 1, depths);
for (y = 0; y < rows; y++) {
G_percent(y, rows - 1, 10);
for (x = 0; x < cols; x++) {
if (typeIntern == FCELL_TYPE) {
Rast3d_get_value(map, x, y, z, &f1, typeIntern);
if (Rast3d_is_null_value_num(&f1, FCELL_TYPE))
Rast_set_null_value(&fcell[x], 1, FCELL_TYPE);
else
fcell[x] = f1;
} else {
Rast3d_get_value(map, x, y, z, &d1, typeIntern);
if (Rast3d_is_null_value_num(&d1, DCELL_TYPE))
Rast_set_null_value(&dcell[x], 1, DCELL_TYPE);
else
dcell[x] = d1;
}
}
if (typeIntern == FCELL_TYPE)
Rast_put_f_row(fd[pos], fcell);
if (typeIntern == DCELL_TYPE)
Rast_put_d_row(fd[pos], dcell);
}
G_debug(2, "Finished writing map %d.", z + 1);
pos++;
}
if (dcell)
G_free(dcell);
if (fcell)
G_free(fcell);
}
/*!
\brief Get categories/labels
Formats label as in d.what.rast -> (catval) catlabel
\param filename raster map name
\param drow
\param dcol
\param catstr category string
\return 1 on success
\return 0 on failure
*/
int Gs_get_cat_label(const char *filename, int drow, int dcol, char *catstr)
{
struct Categories cats;
const char *mapset;
CELL *buf;
DCELL *dbuf;
RASTER_MAP_TYPE map_type;
int fd = -1;
if ((mapset = G_find_raster2(filename, "")) == NULL) {
G_warning(_("Raster map <%s> not found"), filename);
return 0;
}
if (-1 != Rast_read_cats(filename, mapset, &cats)) {
fd = Rast_open_old(filename, mapset);
map_type = Rast_get_map_type(fd);
if (map_type == CELL_TYPE) {
buf = Rast_allocate_c_buf();
Rast_get_c_row(fd, buf, drow);
if (Rast_is_c_null_value(&buf[dcol])) {
sprintf(catstr, "(NULL) %s",
Rast_get_c_cat(&buf[dcol], &cats));
}
else {
sprintf(catstr, "(%d) %s", buf[dcol],
Rast_get_c_cat(&buf[dcol], &cats));
}
G_free(buf);
}
else {
/* fp map */
dbuf = Rast_allocate_d_buf();
Rast_get_d_row(fd, dbuf, drow);
if (Rast_is_d_null_value(&dbuf[dcol])) {
sprintf(catstr, "(NULL) %s",
Rast_get_d_cat(&dbuf[dcol], &cats));
}
else {
sprintf(catstr, "(%g) %s", dbuf[dcol],
Rast_get_d_cat(&dbuf[dcol], &cats));
}
G_free(dbuf);
}
}
else {
strcpy(catstr, "no category label");
return 0;
}
/* TODO: may want to keep these around for multiple queries */
Rast_free_cats(&cats);
if (fd >= 0)
Rast_close(fd);
return (1);
}
int main(int argc, char *argv[])
{
/* variables */
DCELL *data_buf;
CELL *clump_buf;
CELL i, max;
int row, col, rows, cols;
int out_mode, use_MASK, *n, *e;
long int *count;
int fd_data, fd_clump;
const char *datamap, *clumpmap, *centroidsmap;
double avg, vol, total_vol, east, north, *sum;
struct Cell_head window;
struct Map_info *fd_centroids;
struct line_pnts *Points;
struct line_cats *Cats;
struct field_info *Fi;
char buf[DB_SQL_MAX];
dbString sql;
dbDriver *driver;
struct GModule *module;
struct {
struct Option *input, *clump, *centroids, *output;
} opt;
struct {
struct Flag *report;
} flag;
/* define parameters and flags */
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("raster"));
G_add_keyword(_("volume"));
G_add_keyword(_("clumps"));
module->label =
_("Calculates the volume of data \"clumps\".");
module->description = _("Optionally produces a GRASS vector points map "
"containing the calculated centroids of these clumps.");
opt.input = G_define_standard_option(G_OPT_R_INPUT);
opt.input->description =
_("Name of input raster map representing data that will be summed within clumps");
opt.clump = G_define_standard_option(G_OPT_R_INPUT);
opt.clump->key = "clump";
opt.clump->required = NO;
opt.clump->label =
_("Name of input clump raster map");
opt.clump->description = _("Preferably the output of r.clump. "
"If no clump map is given than MASK is used.");
opt.centroids = G_define_standard_option(G_OPT_V_OUTPUT);
opt.centroids->key = "centroids";
opt.centroids->required = NO;
opt.centroids->description = _("Name for output vector points map to contain clump centroids");
opt.output = G_define_standard_option(G_OPT_F_OUTPUT);
opt.output->required = NO;
opt.output->label =
_("Name for output file to hold the report");
opt.output->description =
_("If no output file given report is printed to standard output");
flag.report = G_define_flag();
flag.report->key = 'f';
flag.report->description = _("Generate unformatted report (items separated by colon)");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
/* get arguments */
datamap = opt.input->answer;
clumpmap = NULL;
if (opt.clump->answer)
clumpmap = opt.clump->answer;
centroidsmap = NULL;
fd_centroids = NULL;
Points = NULL;
Cats = NULL;
driver = NULL;
if (opt.centroids->answer) {
centroidsmap = opt.centroids->answer;
fd_centroids = G_malloc(sizeof(struct Map_info));
}
out_mode = (!flag.report->answer);
/*
* see if MASK or a separate "clumpmap" raster map is to be used
* -- it must(!) be one of those two choices.
*/
use_MASK = 0;
if (!clumpmap) {
clumpmap = "MASK";
use_MASK = 1;
if (!G_find_raster2(clumpmap, G_mapset()))
G_fatal_error(_("No MASK found. If no clump map is given than the MASK is required. "
"You need to define a clump raster map or create a MASK by r.mask command."));
G_important_message(_("No clump map given, using MASK"));
}
/* open input and clump raster maps */
fd_data = Rast_open_old(datamap, "");
fd_clump = Rast_open_old(clumpmap, use_MASK ? G_mapset() : "");
/* initialize vector map (for centroids) if needed */
if (centroidsmap) {
if (Vect_open_new(fd_centroids, centroidsmap, WITHOUT_Z) < 0)
G_fatal_error(_("Unable to create vector map <%s>"), centroidsmap);
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
/* initialize data structures */
Vect_append_point(Points, 0., 0., 0.);
Vect_cat_set(Cats, 1, 1);
}
/* initialize output file */
if (opt.output->answer && strcmp(opt.output->answer, "-") != 0) {
if (freopen(opt.output->answer, "w", stdout) == NULL) {
perror(opt.output->answer);
exit(EXIT_FAILURE);
}
}
/* initialize data accumulation arrays */
max = Rast_get_max_c_cat(clumpmap, use_MASK ? G_mapset() : "");
sum = (double *)G_malloc((max + 1) * sizeof(double));
count = (long int *)G_malloc((max + 1) * sizeof(long int));
G_zero(sum, (max + 1) * sizeof(double));
G_zero(count, (max + 1) * sizeof(long int));
data_buf = Rast_allocate_d_buf();
clump_buf = Rast_allocate_c_buf();
/* get window size */
G_get_window(&window);
rows = window.rows;
cols = window.cols;
/* now get the data -- first pass */
for (row = 0; row < rows; row++) {
G_percent(row, rows, 2);
Rast_get_d_row(fd_data, data_buf, row);
Rast_get_c_row(fd_clump, clump_buf, row);
for (col = 0; col < cols; col++) {
i = clump_buf[col];
if (i > max)
G_fatal_error(_("Invalid category value %d (max=%d): row=%d col=%d"),
i, max, row, col);
if (i < 1) {
G_debug(3, "row=%d col=%d: zero or negs ignored", row, col);
continue; /* ignore zeros and negs */
}
if (Rast_is_d_null_value(&data_buf[col])) {
G_debug(3, "row=%d col=%d: NULL ignored", row, col);
continue;
}
sum[i] += data_buf[col];
count[i]++;
}
}
G_percent(1, 1, 1);
/* free some buffer space */
G_free(data_buf);
G_free(clump_buf);
/* data lists for centroids of clumps */
e = (int *)G_malloc((max + 1) * sizeof(int));
n = (int *)G_malloc((max + 1) * sizeof(int));
i = centroids(fd_clump, e, n, 1, max);
/* close raster maps */
Rast_close(fd_data);
Rast_close(fd_clump);
/* got everything, now do output */
if (centroidsmap) {
G_message(_("Creating vector point map <%s>..."), centroidsmap);
/* set comment */
sprintf(buf, _("From '%s' on raster map <%s> using clumps from <%s>"),
argv[0], datamap, clumpmap);
Vect_set_comment(fd_centroids, buf);
/* create attribute table */
Fi = Vect_default_field_info(fd_centroids, 1, NULL, GV_1TABLE);
driver = db_start_driver_open_database(Fi->driver,
Vect_subst_var(Fi->database, fd_centroids));
if (driver == NULL) {
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Vect_subst_var(Fi->database, fd_centroids), Fi->driver);
}
db_set_error_handler_driver(driver);
db_begin_transaction(driver);
db_init_string(&sql);
sprintf(buf, "create table %s (cat integer, volume double precision, "
"average double precision, sum double precision, count integer)",
Fi->table);
db_set_string(&sql, buf);
Vect_map_add_dblink(fd_centroids, 1, NULL, Fi->table, GV_KEY_COLUMN, Fi->database,
Fi->driver);
G_debug(3, "%s", db_get_string(&sql));
if (db_execute_immediate(driver, &sql) != DB_OK) {
G_fatal_error(_("Unable to create table: %s"), db_get_string(&sql));
}
}
/* print header */
if (out_mode) {
fprintf(stdout, _("\nVolume report on data from <%s> using clumps on <%s> raster map"),
datamap, clumpmap);
fprintf(stdout, "\n\n");
fprintf(stdout,
_("Category Average Data # Cells Centroid Total\n"));
fprintf(stdout,
_("Number in clump Total in clump Easting Northing Volume"));
fprintf(stdout, "\n%s\n", SEP);
}
total_vol = 0.0;
/* print output, write centroids */
for (i = 1; i <= max; i++) {
if (count[i]) {
avg = sum[i] / (double)count[i];
vol = sum[i] * window.ew_res * window.ns_res;
total_vol += vol;
east = window.west + (e[i] + 0.5) * window.ew_res;
north = window.north - (n[i] + 0.5) * window.ns_res;
if (fd_centroids) { /* write centroids if requested */
Points->x[0] = east;
Points->y[0] = north;
Cats->cat[0] = i;
Vect_write_line(fd_centroids, GV_POINT, Points, Cats);
sprintf(buf, "insert into %s values (%d, %f, %f, %f, %ld)",
Fi->table, i, vol, avg, sum[i], count[i]);
db_set_string(&sql, buf);
if (db_execute_immediate(driver, &sql) != DB_OK)
G_fatal_error(_("Cannot insert new row: %s"),
db_get_string(&sql));
}
if (out_mode)
fprintf(stdout,
"%8d%10.2f%10.0f %7ld %10.2f %10.2f %16.2f\n", i,
avg, sum[i], count[i], east, north, vol);
else
fprintf(stdout, "%d:%.2f:%.0f:%ld:%.2f:%.2f:%.2f\n",
i, avg, sum[i], count[i], east, north, vol);
}
}
/* write centroid attributes and close the map*/
if (fd_centroids) {
db_commit_transaction(driver);
Vect_close(fd_centroids);
}
/* print total value */
if (total_vol > 0.0 && out_mode) {
fprintf(stdout, "%s\n", SEP);
fprintf(stdout, "%60s = %14.2f", _("Total Volume"), total_vol);
fprintf(stdout, "\n");
}
exit(EXIT_SUCCESS);
}
int extract_points(int z_flag)
{
struct line_pnts *points = Vect_new_line_struct();
CELL *cellbuf;
FCELL *fcellbuf;
DCELL *dcellbuf;
int row, col;
double x, y;
int count;
switch (data_type) {
case CELL_TYPE:
cellbuf = Rast_allocate_c_buf();
break;
case FCELL_TYPE:
fcellbuf = Rast_allocate_f_buf();
break;
case DCELL_TYPE:
dcellbuf = Rast_allocate_d_buf();
break;
}
G_message(_("Extracting points..."));
count = 1;
for (row = 0; row < cell_head.rows; row++) {
G_percent(row, n_rows, 2);
y = Rast_row_to_northing((double)(row + .5), &cell_head);
switch (data_type) {
case CELL_TYPE:
Rast_get_c_row(input_fd, cellbuf, row);
break;
case FCELL_TYPE:
Rast_get_f_row(input_fd, fcellbuf, row);
break;
case DCELL_TYPE:
Rast_get_d_row(input_fd, dcellbuf, row);
break;
}
for (col = 0; col < cell_head.cols; col++) {
int cat, val;
double dval;
x = Rast_col_to_easting((double)(col + .5), &cell_head);
switch (data_type) {
case CELL_TYPE:
if (Rast_is_c_null_value(cellbuf + col))
continue;
val = cellbuf[col];
dval = val;
break;
case FCELL_TYPE:
if (Rast_is_f_null_value(fcellbuf + col))
continue;
dval = fcellbuf[col];
break;
case DCELL_TYPE:
if (Rast_is_d_null_value(dcellbuf + col))
continue;
dval = dcellbuf[col];
break;
}
/* value_flag is used only for CELL type */
cat = (value_flag) ? val : count;
Vect_reset_line(points);
Vect_reset_cats(Cats);
Vect_cat_set(Cats, 1, cat);
Vect_append_point(points, x, y, dval);
Vect_write_line(&Map, GV_POINT, points, Cats);
if ((driver != NULL) && !value_flag) {
insert_value(cat, val, dval);
}
count++;
}
}
G_percent(row, n_rows, 2);
switch (data_type) {
case CELL_TYPE:
G_free(cellbuf);
break;
case FCELL_TYPE:
G_free(fcellbuf);
break;
case DCELL_TYPE:
G_free(dcellbuf);
break;
}
Vect_destroy_line_struct(points);
return (1);
}
int main(int argc, char *argv[])
{
int i, j, nlines, type, field, cat;
int fd;
/* struct Categories RCats; *//* TODO */
struct Cell_head window;
RASTER_MAP_TYPE out_type;
CELL *cell;
DCELL *dcell;
double drow, dcol;
char buf[2000];
struct Option *vect_opt, *rast_opt, *field_opt, *col_opt, *where_opt;
int Cache_size;
struct order *cache;
int cur_row;
struct GModule *module;
struct Map_info Map;
struct line_pnts *Points;
struct line_cats *Cats;
int point;
int point_cnt; /* number of points in cache */
int outside_cnt; /* points outside region */
int nocat_cnt; /* points inside region but without category */
int dupl_cnt; /* duplicate categories */
struct bound_box box;
int *catexst, *cex;
struct field_info *Fi;
dbString stmt;
dbDriver *driver;
int select, norec_cnt, update_cnt, upderr_cnt, col_type;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("raster"));
G_add_keyword(_("position"));
G_add_keyword(_("querying"));
G_add_keyword(_("attribute table"));
module->description =
_("Uploads raster values at positions of vector points to the table.");
vect_opt = G_define_standard_option(G_OPT_V_INPUT);
vect_opt->key = "vector";
vect_opt->description =
_("Name of input vector points map for which to edit attribute table");
rast_opt = G_define_standard_option(G_OPT_R_INPUT);
rast_opt->key = "raster";
rast_opt->description = _("Name of existing raster map to be queried");
field_opt = G_define_standard_option(G_OPT_V_FIELD);
col_opt = G_define_option();
col_opt->key = "column";
col_opt->type = TYPE_STRING;
col_opt->required = YES;
col_opt->description =
_("Column name (will be updated by raster values)");
where_opt = G_define_standard_option(G_OPT_DB_WHERE);
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
field = atoi(field_opt->answer);
db_init_string(&stmt);
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
G_get_window(&window);
Vect_region_box(&window, &box); /* T and B set to +/- PORT_DOUBLE_MAX */
/* Open vector */
Vect_set_open_level(2);
Vect_open_old(&Map, vect_opt->answer, "");
Fi = Vect_get_field(&Map, field);
if (Fi == NULL)
G_fatal_error(_("Database connection not defined for layer %d"),
field);
/* Open driver */
driver = db_start_driver_open_database(Fi->driver, Fi->database);
if (driver == NULL) {
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
}
/* Open raster */
fd = Rast_open_old(rast_opt->answer, "");
out_type = Rast_get_map_type(fd);
/* TODO: Later possibly category labels */
/*
if ( Rast_read_cats (name, "", &RCats) < 0 )
G_fatal_error ( "Cannot read category file");
*/
/* Check column type */
col_type = db_column_Ctype(driver, Fi->table, col_opt->answer);
if (col_type == -1)
G_fatal_error(_("Column <%s> not found"), col_opt->answer);
if (col_type != DB_C_TYPE_INT && col_type != DB_C_TYPE_DOUBLE)
G_fatal_error(_("Column type not supported"));
if (out_type == CELL_TYPE && col_type == DB_C_TYPE_DOUBLE)
G_warning(_("Raster type is integer and column type is float"));
if (out_type != CELL_TYPE && col_type == DB_C_TYPE_INT)
G_warning(_("Raster type is float and column type is integer, some data lost!!"));
/* Read vector points to cache */
Cache_size = Vect_get_num_primitives(&Map, GV_POINT);
/* Note: Some space may be wasted (outside region or no category) */
cache = (struct order *)G_calloc(Cache_size, sizeof(struct order));
point_cnt = outside_cnt = nocat_cnt = 0;
nlines = Vect_get_num_lines(&Map);
G_debug(1, "Reading %d vector features fom map", nlines);
for (i = 1; i <= nlines; i++) {
type = Vect_read_line(&Map, Points, Cats, i);
G_debug(4, "line = %d type = %d", i, type);
/* check type */
if (!(type & GV_POINT))
continue; /* Points only */
/* check region */
if (!Vect_point_in_box(Points->x[0], Points->y[0], 0.0, &box)) {
outside_cnt++;
continue;
}
Vect_cat_get(Cats, field, &cat);
if (cat < 0) { /* no category of given field */
nocat_cnt++;
continue;
}
G_debug(4, " cat = %d", cat);
/* Add point to cache */
drow = Rast_northing_to_row(Points->y[0], &window);
dcol = Rast_easting_to_col(Points->x[0], &window);
/* a special case.
* if north falls at southern edge, or east falls on eastern edge,
* the point will appear outside the window.
* So, for these edges, bring the point inside the window
*/
if (drow == window.rows)
drow--;
if (dcol == window.cols)
dcol--;
cache[point_cnt].row = (int)drow;
cache[point_cnt].col = (int)dcol;
cache[point_cnt].cat = cat;
cache[point_cnt].count = 1;
point_cnt++;
}
Vect_set_db_updated(&Map);
Vect_hist_command(&Map);
Vect_close(&Map);
G_debug(1, "Read %d vector points", point_cnt);
/* Cache may contain duplicate categories, sort by cat, find and remove duplicates
* and recalc count and decrease point_cnt */
qsort(cache, point_cnt, sizeof(struct order), by_cat);
G_debug(1, "Points are sorted, starting duplicate removal loop");
for (i = 0, j = 1; j < point_cnt; j++)
if (cache[i].cat != cache[j].cat)
cache[++i] = cache[j];
else
cache[i].count++;
point_cnt = i + 1;
G_debug(1, "%d vector points left after removal of duplicates",
point_cnt);
/* Report number of points not used */
if (outside_cnt)
G_warning(_("%d points outside current region were skipped"),
outside_cnt);
if (nocat_cnt)
G_warning(_("%d points without category were skipped"), nocat_cnt);
/* Sort cache by current region row */
qsort(cache, point_cnt, sizeof(struct order), by_row);
/* Allocate space for raster row */
if (out_type == CELL_TYPE)
cell = Rast_allocate_c_buf();
else
dcell = Rast_allocate_d_buf();
/* Extract raster values from file and store in cache */
G_debug(1, "Extracting raster values");
cur_row = -1;
for (point = 0; point < point_cnt; point++) {
if (cache[point].count > 1)
continue; /* duplicate cats */
if (cur_row != cache[point].row) {
if (out_type == CELL_TYPE)
Rast_get_c_row(fd, cell, cache[point].row);
else
Rast_get_d_row(fd, dcell, cache[point].row);
}
cur_row = cache[point].row;
if (out_type == CELL_TYPE) {
cache[point].value = cell[cache[point].col];
}
else {
cache[point].dvalue = dcell[cache[point].col];
}
} /* point loop */
/* Update table from cache */
G_debug(1, "Updating db table");
/* select existing categories to array (array is sorted) */
select = db_select_int(driver, Fi->table, Fi->key, NULL, &catexst);
db_begin_transaction(driver);
norec_cnt = update_cnt = upderr_cnt = dupl_cnt = 0;
for (point = 0; point < point_cnt; point++) {
if (cache[point].count > 1) {
G_warning(_("More points (%d) of category %d, value set to 'NULL'"),
cache[point].count, cache[point].cat);
dupl_cnt++;
}
/* category exist in DB ? */
cex =
(int *)bsearch((void *)&(cache[point].cat), catexst, select,
sizeof(int), srch_cat);
if (cex == NULL) { /* cat does not exist in DB */
norec_cnt++;
G_warning(_("No record for category %d in table <%s>"),
cache[point].cat, Fi->table);
continue;
}
sprintf(buf, "update %s set %s = ", Fi->table, col_opt->answer);
db_set_string(&stmt, buf);
if (out_type == CELL_TYPE) {
if (cache[point].count > 1 ||
Rast_is_c_null_value(&cache[point].value)) {
sprintf(buf, "NULL");
}
else {
sprintf(buf, "%d ", cache[point].value);
}
}
else { /* FCELL or DCELL */
if (cache[point].count > 1 ||
Rast_is_d_null_value(&cache[point].dvalue)) {
sprintf(buf, "NULL");
}
else {
sprintf(buf, "%.10f", cache[point].dvalue);
}
}
db_append_string(&stmt, buf);
sprintf(buf, " where %s = %d", Fi->key, cache[point].cat);
db_append_string(&stmt, buf);
/* user provides where condition: */
if (where_opt->answer) {
sprintf(buf, " AND %s", where_opt->answer);
db_append_string(&stmt, buf);
}
G_debug(3, db_get_string(&stmt));
/* Update table */
if (db_execute_immediate(driver, &stmt) == DB_OK) {
update_cnt++;
}
else {
upderr_cnt++;
}
}
G_debug(1, "Committing DB transaction");
db_commit_transaction(driver);
G_free(catexst);
db_close_database_shutdown_driver(driver);
db_free_string(&stmt);
/* Report */
G_message(_("%d categories loaded from table"), select);
G_message(_("%d categories loaded from vector"), point_cnt);
G_message(_("%d categories from vector missing in table"), norec_cnt);
G_message(_("%d duplicate categories in vector"), dupl_cnt);
if (!where_opt->answer)
G_message(_("%d records updated"), update_cnt);
G_message(_("%d update errors"), upderr_cnt);
exit(EXIT_SUCCESS);
}
/*!
* \brief Extract a cell value from raster map (bilinear interpolation).
*
* Extract a cell value from raster map at given northing and easting
* with a sampled 3x3 window using a bilinear interpolation.
*
* \param fd file descriptor
* \param window region settings
* \param cats categories
* \param north northing position
* \param east easting position
* \param usedesc flag to scan category label
*
* \return cell value at given position
*/
DCELL Rast_get_sample_bilinear(int fd,
const struct Cell_head * window,
struct Categories * cats,
double north, double east, int usedesc)
{
int row, col;
double grid[2][2];
DCELL *arow = Rast_allocate_d_buf();
DCELL *brow = Rast_allocate_d_buf();
double frow, fcol, trow, tcol;
DCELL result;
frow = Rast_northing_to_row(north, window);
fcol = Rast_easting_to_col(east, window);
/* convert northing and easting to row and col, resp */
row = (int)floor(frow - 0.5);
col = (int)floor(fcol - 0.5);
trow = frow - row - 0.5;
tcol = fcol - col - 0.5;
if (row < 0 || row + 1 >= Rast_window_rows() ||
col < 0 || col + 1 >= Rast_window_cols()) {
Rast_set_d_null_value(&result, 1);
goto done;
}
Rast_get_d_row(fd, arow, row);
Rast_get_d_row(fd, brow, row + 1);
if (Rast_is_d_null_value(&arow[col]) ||
Rast_is_d_null_value(&arow[col + 1]) ||
Rast_is_d_null_value(&brow[col]) ||
Rast_is_d_null_value(&brow[col + 1])) {
Rast_set_d_null_value(&result, 1);
goto done;
}
/*-
* now were ready to do bilinear interpolation over
* arow[col], arow[col+1],
* brow[col], brow[col+1]
*/
if (usedesc) {
char *buf;
G_squeeze(buf = Rast_get_c_cat((int *)&(arow[col]), cats));
grid[0][0] = scancatlabel(buf);
G_squeeze(buf = Rast_get_c_cat((CELL *) & (arow[col + 1]), cats));
grid[0][1] = scancatlabel(buf);
G_squeeze(buf = Rast_get_c_cat((CELL *) & (brow[col]), cats));
grid[1][0] = scancatlabel(buf);
G_squeeze(buf = Rast_get_c_cat((CELL *) & (brow[col + 1]), cats));
grid[1][1] = scancatlabel(buf);
}
else {
grid[0][0] = arow[col];
grid[0][1] = arow[col + 1];
grid[1][0] = brow[col];
grid[1][1] = brow[col + 1];
}
result = Rast_interp_bilinear(tcol, trow,
grid[0][0], grid[0][1], grid[1][0],
grid[1][1]);
done:
G_free(arow);
G_free(brow);
return result;
}