/*!
\brief Get ellipsoid name for the current location
\return pointer to valid name if ok
\return NULL on error
*/
const char *G_database_ellipse_name(void)
{
const char *name;
name = lookup_proj("ellps");
if (!name) {
char buf[256];
double a, es;
G_get_ellipsoid_parameters(&a, &es);
sprintf(buf, "a=%.16g es=%.16g", a, es);
name = G_store(buf);
}
/* strcpy (name, "Unknown ellipsoid"); */
return name;
}
/*!
\brief Query cartographic projection for the current location
Returns a pointer to a string which is a printable name for
projection code <i>proj</i> (as returned by G_projection). Returns
NULL if <i>proj</i> is not a valid projection.
\return projection name
*/
const char *G_database_projection_name(void)
{
int n;
const char *name;
switch (n = G_projection()) {
case PROJECTION_XY:
case PROJECTION_UTM:
case PROJECTION_LL:
return G_projection_name(n);
}
name = lookup_proj("name");
if (!name)
return _("Unknown projection");
return name;
}
/*!
\brief Get datum name for the current location
Returns a pointer to the name of the map datum of the current
database. If there is no map datum explicitely associated with the
actual database, the standard map datum WGS84 is returned, on error
a NULL pointer is returned.
\return datum name
*/
const char *G_database_datum_name(void)
{
const char *name;
char buf[256], params[256];
int datumstatus;
name = lookup_proj("datum");
if (name)
return name;
else if (!proj_info)
return NULL;
else
datumstatus = G_get_datumparams_from_projinfo(proj_info, buf, params);
if (datumstatus == 2)
return G_store(params);
else
return NULL;
}
/*
* Print a grid list to stdout. Just used for debugging.
*/
void print_grid_list( struct grid_db *db )
{
struct grid_info *g;
int i = 1;
printf(" Grid Date Time Variable Nr Nc Nl Proj# Vcs# Filename\n");
for (g=db->FirstGrid; g; g=g->Next) {
int projnum = lookup_proj( db, g->Proj );
int vcsnum = lookup_vcs( db, g->Vcs );
printf("%c %4d %05d %06d %-10s %3d %3d %3d %3d %3d %s\n",
g->SelectBits==ALL_BITS ? '*': ' ',
i, g->DateStamp, g->TimeStamp, g->VarName, g->Nr, g->Nc, g->Nl,
projnum, vcsnum,
g->FileName );
i++;
}
printf("*=include grid in output file\n");
}
