Hello list,
some confusion you may clarify.
Looking into some v6 to v7 coding translation, how would you test for
readability of raster cell header in v7
<from grass-addons: i.landsat.toar>
mapset = G_find_cell2(band_in, "");
if (mapset == NULL) {
G_warning(_("Raster map <%s> not found"), band_in);
continue;
}
if ((infd = G_open_cell_old(band_in, mapset)) < 0)
G_fatal_error(_("Unable to open raster map <%s>"), band_in);
if (G_get_cellhd(band_in, mapset, &cellhd) < 0)
G_fatal_error(_("Unable to read header of raster map <%s>"),
band_in);
if (G_set_window(&cellhd) < 0)
G_fatal_error(_("Cannot reset current region"));
The Last 4 lines I am trying to see if Rast_get_cellhd should be used...
if (Rast_get_cellhd(band_in, "", &cellhd) < 0)
G_fatal_error(_("Unable to read header of raster map
<%s>"), band_in);
if (G_set_window(&cellhd) < 0)
G_fatal_error(_("Cannot reset current region"));
These 4 lines above are returning errors because the two functions
Rast_get_cellhd and G_set_window both return void, and they are tested
for a return value.
How would you rewrite that initial code within version 7?
Thank you,
Yann
--
Yann Chemin
Senior Spatial Hydrologist
www.csu.edu.au/research/icwater
M +61-4-3740 7019
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