GRASS GIS 7 Programmer's Manual  7.7.svn(2018)-r73373
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proj1.c
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1 /*!
2  \file lib/gis/proj1.c
3 
4  \brief GIS Library - Projection support (window related)
5 
6  (C) 2001-2011 by the GRASS Development Team
7 
8  This program is free software under the GNU General Public License
9  (>=v2). Read the file COPYING that comes with GRASS for details.
10 
11  \author Original author CERL
12 */
13 
14 #include <grass/gis.h>
15 
16 /*!
17  \brief Query cartographic projection
18 
19  This routine returns a code indicating the projection for the active
20  region. The current values are (see gis.h)
21 
22  - PROJECTION_XY 0 - x,y (Raw imagery)
23  - PROJECTION_UTM 1 - UTM Universal Transverse Mercator
24  - PROJECTION_SP 2 - State Plane (in feet) - not used, removed
25  - PROJECTION_LL 3 - Latitude-Longitude
26  - PROJECTION_OTHER 99 - others
27 
28  Others may be added in the future.
29 
30  \return projection code (see above)
31 */
32 int G_projection(void)
33 {
34  struct Cell_head window;
35 
36  G_get_set_window(&window);
37  return window.proj;
38 }
2D/3D raster map header (used also for region)
Definition: gis.h:390
int proj
Projection code.
Definition: gis.h:422
void G_get_set_window(struct Cell_head *window)
Get the current working window (region)
int G_projection(void)
Query cartographic projection.
Definition: proj1.c:32