/*--------------------------------------------------------------------*/
int main(int argc, char *argv[])
{
/* Variable declarations */
int nsply, nsplx, nrows, ncols, nsplx_adj, nsply_adj;
int nsubregion_col, nsubregion_row, subregion_row, subregion_col;
int subregion = 0, nsubregions = 0;
int last_row, last_column, grid, bilin, ext, flag_auxiliar, cross; /* booleans */
double stepN, stepE, lambda, mean;
double N_extension, E_extension, edgeE, edgeN;
const char *mapset, *drv, *db, *vector, *map;
char table_name[GNAME_MAX], title[64];
char xname[GNAME_MAX], xmapset[GMAPSET_MAX];
int dim_vect, nparameters, BW;
int *lineVect; /* Vector restoring primitive's ID */
double *TN, *Q, *parVect; /* Interpolating and least-square vectors */
double **N, **obsVect; /* Interpolation and least-square matrix */
SEGMENT out_seg, mask_seg;
const char *out_file, *mask_file;
int out_fd, mask_fd;
double seg_size;
int seg_mb, segments_in_memory;
int have_mask;
/* Structs declarations */
int raster;
struct Map_info In, In_ext, Out;
struct History history;
struct GModule *module;
struct Option *in_opt, *in_ext_opt, *out_opt, *out_map_opt, *stepE_opt,
*stepN_opt, *lambda_f_opt, *type_opt, *dfield_opt, *col_opt, *mask_opt,
*memory_opt, *solver, *error, *iter;
struct Flag *cross_corr_flag, *spline_step_flag;
struct Reg_dimens dims;
struct Cell_head elaboration_reg, original_reg;
struct bound_box general_box, overlap_box, original_box;
struct Point *observ;
struct line_cats *Cats;
dbCatValArray cvarr;
int with_z;
int nrec, ctype = 0;
struct field_info *Fi;
dbDriver *driver, *driver_cats;
/*----------------------------------------------------------------*/
/* Options declarations */
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("surface"));
G_add_keyword(_("interpolation"));
G_add_keyword(_("LIDAR"));
module->description =
_("Performs bicubic or bilinear spline interpolation with Tykhonov regularization.");
cross_corr_flag = G_define_flag();
cross_corr_flag->key = 'c';
cross_corr_flag->description =
_("Find the best Tykhonov regularizing parameter using a \"leave-one-out\" cross validation method");
spline_step_flag = G_define_flag();
spline_step_flag->key = 'e';
spline_step_flag->label = _("Estimate point density and distance");
spline_step_flag->description =
_("Estimate point density and distance for the input vector points within the current region extends and quit");
in_opt = G_define_standard_option(G_OPT_V_INPUT);
in_opt->label = _("Name of input vector point map");
dfield_opt = G_define_standard_option(G_OPT_V_FIELD);
dfield_opt->guisection = _("Settings");
col_opt = G_define_standard_option(G_OPT_DB_COLUMN);
col_opt->required = NO;
col_opt->label =
_("Name of the attribute column with values to be used for approximation");
col_opt->description = _("If not given and input is 3D vector map then z-coordinates are used.");
col_opt->guisection = _("Settings");
in_ext_opt = G_define_standard_option(G_OPT_V_INPUT);
in_ext_opt->key = "sparse_input";
in_ext_opt->required = NO;
in_ext_opt->label =
_("Name of input vector map with sparse points");
out_opt = G_define_standard_option(G_OPT_V_OUTPUT);
out_opt->required = NO;
out_opt->guisection = _("Outputs");
out_map_opt = G_define_standard_option(G_OPT_R_OUTPUT);
out_map_opt->key = "raster_output";
out_map_opt->required = NO;
out_map_opt->guisection = _("Outputs");
mask_opt = G_define_standard_option(G_OPT_R_INPUT);
mask_opt->key = "mask";
mask_opt->label = _("Raster map to use for masking (applies to raster output only)");
mask_opt->description = _("Only cells that are not NULL and not zero are interpolated");
mask_opt->required = NO;
stepE_opt = G_define_option();
stepE_opt->key = "ew_step";
stepE_opt->type = TYPE_DOUBLE;
stepE_opt->required = NO;
stepE_opt->answer = "4";
stepE_opt->description =
_("Length of each spline step in the east-west direction");
stepE_opt->guisection = _("Settings");
stepN_opt = G_define_option();
stepN_opt->key = "ns_step";
stepN_opt->type = TYPE_DOUBLE;
stepN_opt->required = NO;
stepN_opt->answer = "4";
stepN_opt->description =
_("Length of each spline step in the north-south direction");
stepN_opt->guisection = _("Settings");
type_opt = G_define_option();
type_opt->key = "method";
type_opt->description = _("Spline interpolation algorithm");
type_opt->type = TYPE_STRING;
type_opt->options = "bilinear,bicubic";
type_opt->answer = "bilinear";
type_opt->guisection = _("Settings");
G_asprintf((char **) &(type_opt->descriptions),
"bilinear;%s;bicubic;%s",
_("Bilinear interpolation"),
_("Bicubic interpolation"));
lambda_f_opt = G_define_option();
lambda_f_opt->key = "lambda_i";
lambda_f_opt->type = TYPE_DOUBLE;
lambda_f_opt->required = NO;
lambda_f_opt->description = _("Tykhonov regularization parameter (affects smoothing)");
lambda_f_opt->answer = "0.01";
lambda_f_opt->guisection = _("Settings");
solver = N_define_standard_option(N_OPT_SOLVER_SYMM);
solver->options = "cholesky,cg";
solver->answer = "cholesky";
iter = N_define_standard_option(N_OPT_MAX_ITERATIONS);
error = N_define_standard_option(N_OPT_ITERATION_ERROR);
memory_opt = G_define_option();
memory_opt->key = "memory";
memory_opt->type = TYPE_INTEGER;
memory_opt->required = NO;
memory_opt->answer = "300";
memory_opt->label = _("Maximum memory to be used (in MB)");
memory_opt->description = _("Cache size for raster rows");
/*----------------------------------------------------------------*/
/* Parsing */
G_gisinit(argv[0]);
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
vector = out_opt->answer;
map = out_map_opt->answer;
if (vector && map)
G_fatal_error(_("Choose either vector or raster output, not both"));
if (!vector && !map && !cross_corr_flag->answer)
G_fatal_error(_("No raster or vector or cross-validation output"));
if (!strcmp(type_opt->answer, "linear"))
bilin = P_BILINEAR;
else
bilin = P_BICUBIC;
stepN = atof(stepN_opt->answer);
stepE = atof(stepE_opt->answer);
lambda = atof(lambda_f_opt->answer);
flag_auxiliar = FALSE;
drv = db_get_default_driver_name();
if (!drv) {
if (db_set_default_connection() != DB_OK)
G_fatal_error(_("Unable to set default DB connection"));
drv = db_get_default_driver_name();
}
db = db_get_default_database_name();
if (!db)
G_fatal_error(_("No default DB defined"));
/* Set auxiliary table's name */
if (vector) {
if (G_name_is_fully_qualified(out_opt->answer, xname, xmapset)) {
sprintf(table_name, "%s_aux", xname);
}
else
sprintf(table_name, "%s_aux", out_opt->answer);
}
/* Something went wrong in a previous v.surf.bspline execution */
if (db_table_exists(drv, db, table_name)) {
/* Start driver and open db */
driver = db_start_driver_open_database(drv, db);
if (driver == NULL)
G_fatal_error(_("No database connection for driver <%s> is defined. Run db.connect."),
drv);
db_set_error_handler_driver(driver);
if (P_Drop_Aux_Table(driver, table_name) != DB_OK)
G_fatal_error(_("Old auxiliary table could not be dropped"));
db_close_database_shutdown_driver(driver);
}
/* Open input vector */
if ((mapset = G_find_vector2(in_opt->answer, "")) == NULL)
G_fatal_error(_("Vector map <%s> not found"), in_opt->answer);
Vect_set_open_level(1); /* WITHOUT TOPOLOGY */
if (1 > Vect_open_old(&In, in_opt->answer, mapset))
G_fatal_error(_("Unable to open vector map <%s> at the topological level"),
in_opt->answer);
bspline_field = 0; /* assume 3D input */
bspline_column = col_opt->answer;
with_z = !bspline_column && Vect_is_3d(&In);
if (Vect_is_3d(&In)) {
if (!with_z)
G_verbose_message(_("Input is 3D: using attribute values instead of z-coordinates for approximation"));
else
G_verbose_message(_("Input is 3D: using z-coordinates for approximation"));
}
else { /* 2D */
if (!bspline_column)
G_fatal_error(_("Input vector map is 2D. Parameter <%s> required."), col_opt->key);
}
if (!with_z) {
bspline_field = Vect_get_field_number(&In, dfield_opt->answer);
}
/* Estimate point density and mean distance for current region */
if (spline_step_flag->answer) {
double dens, dist;
if (P_estimate_splinestep(&In, &dens, &dist) == 0) {
fprintf(stdout, _("Estimated point density: %.4g"), dens);
fprintf(stdout, _("Estimated mean distance between points: %.4g"), dist);
}
else {
fprintf(stdout, _("No points in current region"));
}
Vect_close(&In);
exit(EXIT_SUCCESS);
}
/*----------------------------------------------------------------*/
/* Cross-correlation begins */
if (cross_corr_flag->answer) {
G_debug(1, "CrossCorrelation()");
cross = cross_correlation(&In, stepE, stepN);
if (cross != TRUE)
G_fatal_error(_("Cross validation didn't finish correctly"));
else {
G_debug(1, "Cross validation finished correctly");
Vect_close(&In);
G_done_msg(_("Cross validation finished for ew_step = %f and ns_step = %f"), stepE, stepN);
exit(EXIT_SUCCESS);
}
}
/* Open input ext vector */
ext = FALSE;
if (in_ext_opt->answer) {
ext = TRUE;
G_message(_("Vector map <%s> of sparse points will be interpolated"),
in_ext_opt->answer);
if ((mapset = G_find_vector2(in_ext_opt->answer, "")) == NULL)
G_fatal_error(_("Vector map <%s> not found"), in_ext_opt->answer);
Vect_set_open_level(1); /* WITHOUT TOPOLOGY */
if (1 > Vect_open_old(&In_ext, in_ext_opt->answer, mapset))
G_fatal_error(_("Unable to open vector map <%s> at the topological level"),
in_opt->answer);
}
/* Open output map */
/* vector output */
if (vector && !map) {
if (strcmp(drv, "dbf") == 0)
G_fatal_error(_("Sorry, the <%s> driver is not compatible with "
"the vector output of this module. "
"Try with raster output or another driver."), drv);
Vect_check_input_output_name(in_opt->answer, out_opt->answer,
G_FATAL_EXIT);
grid = FALSE;
if (0 > Vect_open_new(&Out, out_opt->answer, WITH_Z))
G_fatal_error(_("Unable to create vector map <%s>"),
out_opt->answer);
/* Copy vector Head File */
if (ext == FALSE) {
Vect_copy_head_data(&In, &Out);
Vect_hist_copy(&In, &Out);
}
else {
Vect_copy_head_data(&In_ext, &Out);
Vect_hist_copy(&In_ext, &Out);
}
Vect_hist_command(&Out);
G_verbose_message(_("Points in input vector map <%s> will be interpolated"),
vector);
}
/* read z values from attribute table */
if (bspline_field > 0) {
G_message(_("Reading values from attribute table..."));
db_CatValArray_init(&cvarr);
Fi = Vect_get_field(&In, bspline_field);
if (Fi == NULL)
G_fatal_error(_("Cannot read layer info"));
driver_cats = db_start_driver_open_database(Fi->driver, Fi->database);
/*G_debug (0, _("driver=%s db=%s"), Fi->driver, Fi->database); */
if (driver_cats == NULL)
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
db_set_error_handler_driver(driver_cats);
nrec =
db_select_CatValArray(driver_cats, Fi->table, Fi->key,
col_opt->answer, NULL, &cvarr);
G_debug(3, "nrec = %d", nrec);
ctype = cvarr.ctype;
if (ctype != DB_C_TYPE_INT && ctype != DB_C_TYPE_DOUBLE)
G_fatal_error(_("Column type not supported"));
if (nrec < 0)
G_fatal_error(_("Unable to select data from table"));
G_verbose_message(_("%d records selected from table"), nrec);
db_close_database_shutdown_driver(driver_cats);
}
/*----------------------------------------------------------------*/
/* Interpolation begins */
G_debug(1, "Interpolation()");
/* Open driver and database */
driver = db_start_driver_open_database(drv, db);
if (driver == NULL)
G_fatal_error(_("No database connection for driver <%s> is defined. "
"Run db.connect."), drv);
db_set_error_handler_driver(driver);
/* Create auxiliary table */
if (vector) {
if ((flag_auxiliar = P_Create_Aux4_Table(driver, table_name)) == FALSE) {
P_Drop_Aux_Table(driver, table_name);
G_fatal_error(_("Interpolation: Creating table: "
"It was impossible to create table <%s>."),
table_name);
}
/* db_create_index2(driver, table_name, "ID"); */
/* sqlite likes that ??? */
db_close_database_shutdown_driver(driver);
driver = db_start_driver_open_database(drv, db);
}
/* raster output */
raster = -1;
Rast_set_fp_type(DCELL_TYPE);
if (!vector && map) {
grid = TRUE;
raster = Rast_open_fp_new(out_map_opt->answer);
G_verbose_message(_("Cells for raster map <%s> will be interpolated"),
map);
}
/* Setting regions and boxes */
G_debug(1, "Interpolation: Setting regions and boxes");
G_get_window(&original_reg);
G_get_window(&elaboration_reg);
Vect_region_box(&original_reg, &original_box);
Vect_region_box(&elaboration_reg, &overlap_box);
Vect_region_box(&elaboration_reg, &general_box);
nrows = Rast_window_rows();
ncols = Rast_window_cols();
/* Alloc raster matrix */
have_mask = 0;
out_file = mask_file = NULL;
out_fd = mask_fd = -1;
if (grid == TRUE) {
int row;
DCELL *drastbuf;
seg_mb = atoi(memory_opt->answer);
if (seg_mb < 3)
G_fatal_error(_("Memory in MB must be >= 3"));
if (mask_opt->answer)
seg_size = sizeof(double) + sizeof(char);
else
seg_size = sizeof(double);
seg_size = (seg_size * SEGSIZE * SEGSIZE) / (1 << 20);
segments_in_memory = seg_mb / seg_size + 0.5;
G_debug(1, "%d %dx%d segments held in memory", segments_in_memory, SEGSIZE, SEGSIZE);
out_file = G_tempfile();
out_fd = creat(out_file, 0666);
if (Segment_format(out_fd, nrows, ncols, SEGSIZE, SEGSIZE, sizeof(double)) != 1)
G_fatal_error(_("Can not create temporary file"));
close(out_fd);
out_fd = open(out_file, 2);
if (Segment_init(&out_seg, out_fd, segments_in_memory) != 1)
G_fatal_error(_("Can not initialize temporary file"));
/* initialize output */
G_message(_("Initializing output..."));
drastbuf = Rast_allocate_buf(DCELL_TYPE);
Rast_set_d_null_value(drastbuf, ncols);
for (row = 0; row < nrows; row++) {
G_percent(row, nrows, 2);
Segment_put_row(&out_seg, drastbuf, row);
}
G_percent(row, nrows, 2);
if (mask_opt->answer) {
int row, col, maskfd;
DCELL dval, *drastbuf;
char mask_val;
G_message(_("Load masking map"));
mask_file = G_tempfile();
mask_fd = creat(mask_file, 0666);
if (Segment_format(mask_fd, nrows, ncols, SEGSIZE, SEGSIZE, sizeof(char)) != 1)
G_fatal_error(_("Can not create temporary file"));
close(mask_fd);
mask_fd = open(mask_file, 2);
if (Segment_init(&mask_seg, mask_fd, segments_in_memory) != 1)
G_fatal_error(_("Can not initialize temporary file"));
maskfd = Rast_open_old(mask_opt->answer, "");
drastbuf = Rast_allocate_buf(DCELL_TYPE);
for (row = 0; row < nrows; row++) {
G_percent(row, nrows, 2);
Rast_get_d_row(maskfd, drastbuf, row);
for (col = 0; col < ncols; col++) {
dval = drastbuf[col];
if (Rast_is_d_null_value(&dval) || dval == 0)
mask_val = 0;
else
mask_val = 1;
Segment_put(&mask_seg, &mask_val, row, col);
}
}
G_percent(row, nrows, 2);
G_free(drastbuf);
Rast_close(maskfd);
have_mask = 1;
}
}
/*------------------------------------------------------------------
| Subdividing and working with tiles:
| Each original region will be divided into several subregions.
| Each one will be overlaped by its neighbouring subregions.
| The overlapping is calculated as a fixed OVERLAP_SIZE times
| the largest spline step plus 2 * edge
----------------------------------------------------------------*/
/* Fixing parameters of the elaboration region */
P_zero_dim(&dims); /* Set dim struct to zero */
nsplx_adj = NSPLX_MAX;
nsply_adj = NSPLY_MAX;
if (stepN > stepE)
dims.overlap = OVERLAP_SIZE * stepN;
else
dims.overlap = OVERLAP_SIZE * stepE;
P_get_edge(bilin, &dims, stepE, stepN);
P_set_dim(&dims, stepE, stepN, &nsplx_adj, &nsply_adj);
G_verbose_message(_("Adjusted EW splines %d"), nsplx_adj);
G_verbose_message(_("Adjusted NS splines %d"), nsply_adj);
/* calculate number of subregions */
edgeE = dims.ew_size - dims.overlap - 2 * dims.edge_v;
edgeN = dims.sn_size - dims.overlap - 2 * dims.edge_h;
N_extension = original_reg.north - original_reg.south;
E_extension = original_reg.east - original_reg.west;
nsubregion_col = ceil(E_extension / edgeE) + 0.5;
nsubregion_row = ceil(N_extension / edgeN) + 0.5;
if (nsubregion_col < 0)
nsubregion_col = 0;
if (nsubregion_row < 0)
nsubregion_row = 0;
nsubregions = nsubregion_row * nsubregion_col;
/* Creating line and categories structs */
Cats = Vect_new_cats_struct();
Vect_cat_set(Cats, 1, 0);
subregion_row = 0;
elaboration_reg.south = original_reg.north;
last_row = FALSE;
while (last_row == FALSE) { /* For each subregion row */
subregion_row++;
P_set_regions(&elaboration_reg, &general_box, &overlap_box, dims,
GENERAL_ROW);
if (elaboration_reg.north > original_reg.north) { /* First row */
P_set_regions(&elaboration_reg, &general_box, &overlap_box, dims,
FIRST_ROW);
}
if (elaboration_reg.south <= original_reg.south) { /* Last row */
P_set_regions(&elaboration_reg, &general_box, &overlap_box, dims,
LAST_ROW);
last_row = TRUE;
}
nsply =
ceil((elaboration_reg.north -
elaboration_reg.south) / stepN) + 0.5;
G_debug(1, "Interpolation: nsply = %d", nsply);
/*
if (nsply > NSPLY_MAX)
nsply = NSPLY_MAX;
*/
elaboration_reg.east = original_reg.west;
last_column = FALSE;
subregion_col = 0;
/* TODO: process each subregion using its own thread (via OpenMP or pthreads) */
/* I'm not sure about pthreads, but you can tell OpenMP to start all at the
same time and it will keep num_workers supplied with the next job as free
cpus become available */
while (last_column == FALSE) { /* For each subregion column */
int npoints = 0;
/* needed for sparse points interpolation */
int npoints_ext, *lineVect_ext = NULL;
double **obsVect_ext; /*, mean_ext = .0; */
struct Point *observ_ext;
subregion_col++;
subregion++;
if (nsubregions > 1)
G_message(_("Processing subregion %d of %d..."), subregion, nsubregions);
P_set_regions(&elaboration_reg, &general_box, &overlap_box, dims,
GENERAL_COLUMN);
if (elaboration_reg.west < original_reg.west) { /* First column */
P_set_regions(&elaboration_reg, &general_box, &overlap_box,
dims, FIRST_COLUMN);
}
if (elaboration_reg.east >= original_reg.east) { /* Last column */
P_set_regions(&elaboration_reg, &general_box, &overlap_box,
dims, LAST_COLUMN);
last_column = TRUE;
}
nsplx =
ceil((elaboration_reg.east -
elaboration_reg.west) / stepE) + 0.5;
G_debug(1, "Interpolation: nsplx = %d", nsplx);
/*
if (nsplx > NSPLX_MAX)
nsplx = NSPLX_MAX;
*/
G_debug(1, "Interpolation: (%d,%d): subregion bounds",
subregion_row, subregion_col);
G_debug(1, "Interpolation: \t\tNORTH:%.2f\t",
elaboration_reg.north);
G_debug(1, "Interpolation: WEST:%.2f\t\tEAST:%.2f",
elaboration_reg.west, elaboration_reg.east);
G_debug(1, "Interpolation: \t\tSOUTH:%.2f",
elaboration_reg.south);
#ifdef DEBUG_SUBREGIONS
fprintf(stdout, "B 5\n");
fprintf(stdout, " %.11g %.11g\n", elaboration_reg.east, elaboration_reg.north);
fprintf(stdout, " %.11g %.11g\n", elaboration_reg.west, elaboration_reg.north);
fprintf(stdout, " %.11g %.11g\n", elaboration_reg.west, elaboration_reg.south);
fprintf(stdout, " %.11g %.11g\n", elaboration_reg.east, elaboration_reg.south);
fprintf(stdout, " %.11g %.11g\n", elaboration_reg.east, elaboration_reg.north);
fprintf(stdout, "C 1 1\n");
fprintf(stdout, " %.11g %.11g\n", (elaboration_reg.west + elaboration_reg.east) / 2,
(elaboration_reg.south + elaboration_reg.north) / 2);
fprintf(stdout, " 1 %d\n", subregion);
#endif
/* reading points in interpolation region */
dim_vect = nsplx * nsply;
observ_ext = NULL;
if (grid == FALSE && ext == TRUE) {
observ_ext =
P_Read_Vector_Region_Map(&In_ext,
&elaboration_reg,
&npoints_ext, dim_vect,
1);
}
else
npoints_ext = 1;
if (grid == TRUE && have_mask) {
/* any unmasked cells in general region ? */
mean = 0;
observ_ext =
P_Read_Raster_Region_masked(&mask_seg, &original_reg,
original_box, general_box,
&npoints_ext, dim_vect, mean);
}
observ = NULL;
if (npoints_ext > 0) {
observ =
P_Read_Vector_Region_Map(&In, &elaboration_reg, &npoints,
dim_vect, bspline_field);
}
else
npoints = 1;
G_debug(1,
"Interpolation: (%d,%d): Number of points in <elaboration_box> is %d",
subregion_row, subregion_col, npoints);
if (npoints > 0)
G_verbose_message(_("%d points found in this subregion"), npoints);
/* only interpolate if there are any points in current subregion */
if (npoints > 0 && npoints_ext > 0) {
int i;
nparameters = nsplx * nsply;
BW = P_get_BandWidth(bilin, nsply);
/* Least Squares system */
N = G_alloc_matrix(nparameters, BW); /* Normal matrix */
TN = G_alloc_vector(nparameters); /* vector */
parVect = G_alloc_vector(nparameters); /* Parameters vector */
obsVect = G_alloc_matrix(npoints, 3); /* Observation vector */
Q = G_alloc_vector(npoints); /* "a priori" var-cov matrix */
lineVect = G_alloc_ivector(npoints); /* */
for (i = 0; i < npoints; i++) { /* Setting obsVect vector & Q matrix */
double dval;
Q[i] = 1; /* Q=I */
lineVect[i] = observ[i].lineID;
obsVect[i][0] = observ[i].coordX;
obsVect[i][1] = observ[i].coordY;
/* read z coordinates from attribute table */
if (bspline_field > 0) {
int cat, ival, ret;
cat = observ[i].cat;
if (cat < 0)
continue;
if (ctype == DB_C_TYPE_INT) {
ret =
db_CatValArray_get_value_int(&cvarr, cat,
&ival);
obsVect[i][2] = ival;
observ[i].coordZ = ival;
}
else { /* DB_C_TYPE_DOUBLE */
ret =
db_CatValArray_get_value_double(&cvarr, cat,
&dval);
obsVect[i][2] = dval;
observ[i].coordZ = dval;
}
if (ret != DB_OK) {
G_warning(_("Interpolation: (%d,%d): No record for point (cat = %d)"),
subregion_row, subregion_col, cat);
continue;
}
}
/* use z coordinates of 3D vector */
else {
obsVect[i][2] = observ[i].coordZ;
}
}
/* Mean calculation for every point */
mean = P_Mean_Calc(&elaboration_reg, observ, npoints);
G_debug(1, "Interpolation: (%d,%d): mean=%lf",
subregion_row, subregion_col, mean);
G_free(observ);
for (i = 0; i < npoints; i++)
obsVect[i][2] -= mean;
/* Bilinear interpolation */
if (bilin) {
G_debug(1,
"Interpolation: (%d,%d): Bilinear interpolation...",
subregion_row, subregion_col);
normalDefBilin(N, TN, Q, obsVect, stepE, stepN, nsplx,
nsply, elaboration_reg.west,
elaboration_reg.south, npoints,
nparameters, BW);
nCorrectGrad(N, lambda, nsplx, nsply, stepE, stepN);
}
/* Bicubic interpolation */
else {
G_debug(1,
"Interpolation: (%d,%d): Bicubic interpolation...",
subregion_row, subregion_col);
normalDefBicubic(N, TN, Q, obsVect, stepE, stepN, nsplx,
nsply, elaboration_reg.west,
elaboration_reg.south, npoints,
nparameters, BW);
nCorrectGrad(N, lambda, nsplx, nsply, stepE, stepN);
}
if(G_strncasecmp(solver->answer, "cg", 2) == 0)
G_math_solver_cg_sband(N, parVect, TN, nparameters, BW, atoi(iter->answer), atof(error->answer));
else
G_math_solver_cholesky_sband(N, parVect, TN, nparameters, BW);
G_free_matrix(N);
G_free_vector(TN);
G_free_vector(Q);
if (grid == TRUE) { /* GRID INTERPOLATION ==> INTERPOLATION INTO A RASTER */
G_debug(1, "Interpolation: (%d,%d): Regular_Points...",
subregion_row, subregion_col);
if (!have_mask) {
P_Regular_Points(&elaboration_reg, &original_reg, general_box,
overlap_box, &out_seg, parVect,
stepN, stepE, dims.overlap, mean,
nsplx, nsply, nrows, ncols, bilin);
}
else {
P_Sparse_Raster_Points(&out_seg,
&elaboration_reg, &original_reg,
general_box, overlap_box,
observ_ext, parVect,
stepE, stepN,
dims.overlap, nsplx, nsply,
npoints_ext, bilin, mean);
}
}
else { /* OBSERVATION POINTS INTERPOLATION */
if (ext == FALSE) {
G_debug(1, "Interpolation: (%d,%d): Sparse_Points...",
subregion_row, subregion_col);
P_Sparse_Points(&Out, &elaboration_reg, general_box,
overlap_box, obsVect, parVect,
lineVect, stepE, stepN,
dims.overlap, nsplx, nsply, npoints,
bilin, Cats, driver, mean,
table_name);
}
else { /* FLAG_EXT == TRUE */
/* done that earlier */
/*
int npoints_ext, *lineVect_ext = NULL;
double **obsVect_ext;
struct Point *observ_ext;
observ_ext =
P_Read_Vector_Region_Map(&In_ext,
&elaboration_reg,
&npoints_ext, dim_vect,
1);
*/
obsVect_ext = G_alloc_matrix(npoints_ext, 3); /* Observation vector_ext */
lineVect_ext = G_alloc_ivector(npoints_ext);
for (i = 0; i < npoints_ext; i++) { /* Setting obsVect_ext vector & Q matrix */
obsVect_ext[i][0] = observ_ext[i].coordX;
obsVect_ext[i][1] = observ_ext[i].coordY;
obsVect_ext[i][2] = observ_ext[i].coordZ - mean;
lineVect_ext[i] = observ_ext[i].lineID;
}
G_free(observ_ext);
G_debug(1, "Interpolation: (%d,%d): Sparse_Points...",
subregion_row, subregion_col);
P_Sparse_Points(&Out, &elaboration_reg, general_box,
overlap_box, obsVect_ext, parVect,
lineVect_ext, stepE, stepN,
dims.overlap, nsplx, nsply,
npoints_ext, bilin, Cats, driver,
mean, table_name);
G_free_matrix(obsVect_ext);
G_free_ivector(lineVect_ext);
} /* END FLAG_EXT == TRUE */
} /* END GRID == FALSE */
G_free_vector(parVect);
G_free_matrix(obsVect);
G_free_ivector(lineVect);
}
else {
if (observ)
G_free(observ);
if (observ_ext)
G_free(observ_ext);
if (npoints == 0)
G_warning(_("No data within this subregion. "
"Consider increasing spline step values."));
}
} /*! END WHILE; last_column = TRUE */
} /*! END WHILE; last_row = TRUE */
G_verbose_message(_("Writing output..."));
/* Writing the output raster map */
if (grid == TRUE) {
int row, col;
DCELL *drastbuf, dval;
if (have_mask) {
Segment_release(&mask_seg); /* release memory */
close(mask_fd);
unlink(mask_file);
}
drastbuf = Rast_allocate_buf(DCELL_TYPE);
for (row = 0; row < nrows; row++) {
G_percent(row, nrows, 2);
for (col = 0; col < ncols; col++) {
Segment_get(&out_seg, &dval, row, col);
drastbuf[col] = dval;
}
Rast_put_d_row(raster, drastbuf);
}
Rast_close(raster);
Segment_release(&out_seg); /* release memory */
close(out_fd);
unlink(out_file);
/* set map title */
sprintf(title, "%s interpolation with Tykhonov regularization",
type_opt->answer);
Rast_put_cell_title(out_map_opt->answer, title);
/* write map history */
Rast_short_history(out_map_opt->answer, "raster", &history);
Rast_command_history(&history);
Rast_write_history(out_map_opt->answer, &history);
}
/* Writing to the output vector map the points from the overlapping zones */
else if (flag_auxiliar == TRUE) {
if (ext == FALSE)
P_Aux_to_Vector(&In, &Out, driver, table_name);
else
P_Aux_to_Vector(&In_ext, &Out, driver, table_name);
/* Drop auxiliary table */
G_debug(1, "%s: Dropping <%s>", argv[0], table_name);
if (P_Drop_Aux_Table(driver, table_name) != DB_OK)
G_fatal_error(_("Auxiliary table could not be dropped"));
}
db_close_database_shutdown_driver(driver);
Vect_close(&In);
if (ext != FALSE)
Vect_close(&In_ext);
if (vector)
Vect_close(&Out);
G_done_msg(" ");
exit(EXIT_SUCCESS);
} /*END MAIN */
static int
write_pca(double **eigmat, int *inp_fd, char *out_basename,
int bands, int scale, int scale_min, int scale_max)
{
int i, j;
void *outbuf, *outptr;
double min = 0.;
double max = 0.;
double old_range = 0.;
double new_range = 0.;
int rows = Rast_window_rows();
int cols = Rast_window_cols();
int cell_mapsiz = Rast_cell_size(CELL_TYPE);
int dcell_mapsiz = Rast_cell_size(DCELL_TYPE);
DCELL *d_buf;
/* 2 passes for rescale. 1 pass for no rescale */
int PASSES = (scale) ? 2 : 1;
/* temporary row storage */
d_buf = (DCELL *) G_malloc(cols * sizeof(double));
/* allocate memory for output row buffer */
outbuf = (scale) ? Rast_allocate_buf(CELL_TYPE) :
Rast_allocate_buf(DCELL_TYPE);
if (!outbuf)
G_fatal_error(_("Unable to allocate memory for raster row"));
for (i = 0; i < bands; i++) {
char name[100];
int out_fd;
int pass;
sprintf(name, "%s.%d", out_basename, i + 1);
G_message(_("Transforming <%s>..."), name);
/* open a new file for output */
if (scale)
out_fd = Rast_open_c_new(name);
else {
out_fd = Rast_open_fp_new(name);
Rast_set_fp_type(DCELL_TYPE);
}
for (pass = 1; pass <= PASSES; pass++) {
void *rowbuf = NULL;
int row, col;
if (scale && (pass == PASSES)) {
G_message(_("Rescaling <%s> to range %d,%d..."),
name, scale_min, scale_max);
old_range = max - min;
new_range = (double)(scale_max - scale_min);
}
for (row = 0; row < rows; row++) {
void *rowptr;
G_percent(row, rows, 2);
/* reset d_buf */
for (col = 0; col < cols; col++)
d_buf[col] = 0.;
for (j = 0; j < bands; j++) {
RASTER_MAP_TYPE maptype =
Rast_get_map_type(inp_fd[j]);
/* don't assume each image is of the same type */
if (rowbuf)
G_free(rowbuf);
if (!(rowbuf = Rast_allocate_buf(maptype)))
G_fatal_error(_("Unable allocate memory for row buffer"));
Rast_get_row(inp_fd[j], rowbuf, row, maptype);
rowptr = rowbuf;
outptr = outbuf;
/* add into the output cell eigmat[i][j] * corresp cell
* of j-th band for current j */
for (col = 0; col < cols; col++) {
/* handle null cells */
if (Rast_is_null_value(rowptr, maptype)) {
if (scale) {
Rast_set_null_value(outptr, 1, CELL_TYPE);
outptr = G_incr_void_ptr(outptr, cell_mapsiz);
}
else {
Rast_set_null_value(outptr, 1, DCELL_TYPE);
outptr =
G_incr_void_ptr(outptr, dcell_mapsiz);
}
rowptr =
G_incr_void_ptr(rowptr,
Rast_cell_size(maptype));
continue;
}
/* corresp. cell of j-th band */
d_buf[col] +=
eigmat[i][j] * Rast_get_d_value(rowptr,
maptype);
/* the cell entry is complete */
if (j == (bands - 1)) {
if (scale && (pass == 1)) {
if ((row == 0) && (col == 0))
min = max = d_buf[0];
if (d_buf[col] < min)
min = d_buf[col];
if (d_buf[col] > max)
max = d_buf[col];
}
else if (scale) {
if (min == max) {
Rast_set_c_value(outptr, 1,
CELL_TYPE);
}
else {
/* map data to 0, (new_range-1) and then adding new_min */
CELL tmpcell =
round_c((new_range *
(d_buf[col] -
min) / old_range) +
scale_min);
Rast_set_c_value(outptr, tmpcell,
CELL_TYPE);
}
}
else { /* (!scale) */
Rast_set_d_value(outptr, d_buf[col],
DCELL_TYPE);
}
}
outptr = (scale) ?
G_incr_void_ptr(outptr, cell_mapsiz) :
G_incr_void_ptr(outptr, dcell_mapsiz);
rowptr =
G_incr_void_ptr(rowptr, Rast_cell_size(maptype));
}
} /* for j = 0 to bands */
if (pass == PASSES) {
if (scale)
Rast_put_row(out_fd, outbuf, CELL_TYPE);
else
Rast_put_row(out_fd, outbuf, DCELL_TYPE);
}
}
G_percent(row, rows, 2);
/* close output file */
if (pass == PASSES)
Rast_close(out_fd);
}
}
if (d_buf)
G_free(d_buf);
if (outbuf)
G_free(outbuf);
return 0;
}
