[GRASS-dev] c code: access region/window yllcorner and xllcorner values

GRASS GRASS developer
1

Hello,

I am trying make a module to (among other things) export a flow
direction map in a specific ascii format.

I need to access the region or window xllcorner and yllcorner, right now,
the only code I found was to access cellhd.xxx variables:

xmin=cellhd.west;
xmax=cellhd.east;
ymin=cellhd.south;
ymax=cellhd.north;

which is not exactly my need since the xllcorner and yllcorner are
going to be part of the header of the new ascii file, where pixels
will be extracted from within the region limits.

I looked at G_window_* but no luck...
Any suggestions would be much appreciated,

Yann

--
Yann Chemin
International Rice Research Institute
Office: http://www.irri.org/gis
Perso: http://www.freewebs.com/ychemin

2

Yann Chemin wrote:

I am trying make a module to (among other things) export a flow
direction map in a specific ascii format.

I need to access the region or window xllcorner and yllcorner, right now,
the only code I found was to access cellhd.xxx variables:

xmin=cellhd.west;
xmax=cellhd.east;
ymin=cellhd.south;
ymax=cellhd.north;

which is not exactly my need since the xllcorner and yllcorner are
going to be part of the header of the new ascii file, where pixels
will be extracted from within the region limits.

  struct Cell_head cellhd;
  G_get_window(&cellhd);
  xllcorner=cellhd.west;
  yllcorner=cellhd.south;

--
Glynn Clements <glynn@gclements.plus.com>