proj1.c

Go to the documentation of this file.

/*!
   \file lib/gis/proj1.c
 
   \brief GIS Library - Projection support (window related)
 
   (C) 2001-2011 by the GRASS Development Team
 
   This program is free software under the GNU General Public License
   (>=v2). Read the file COPYING that comes with GRASS for details.
 
   \author Original author CERL
 */
 
#include <grass/gis.h>
 
/*!
   \brief Query cartographic projection
 
   This routine returns a code indicating the projection for the active
   region. The current values are (see gis.h)
 
   - PROJECTION_XY      0 - x,y (Raw imagery)
   - PROJECTION_UTM     1 - UTM   Universal Transverse Mercator
   - PROJECTION_SP      2 - State Plane (in feet) - not used, removed
   - PROJECTION_LL      3 - Latitude-Longitude
   - PROJECTION_OTHER  99 - others
 
   Others may be added in the future.
 
   \return projection code (see above)
 */
int G_projection(void)
{
    struct Cell_head window;
 
    G_get_set_window(&window);
    return window.proj;
}