GRASS GIS 8 Programmer's Manual  8.4.0dev(2024)-c17eaff561
zone.c
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1 /*!
2  * \file lib/gis/zone.c
3  *
4  * \brief GIS Library - Cartographic zone functions.
5  *
6  * This program is free software under the GNU General Public License
7  * (>=v2). Read the file COPYING that comes with GRASS for details.
8  *
9  * \author Original author CERL
10  */
11 
12 #include <grass/gis.h>
13 
14 /*!
15  * \brief Query cartographic zone.
16  *
17  * This routine returns the zone for the active region. The meaning
18  * for the zone depends on the projection. For example, zone 18 for
19  * projection type 1 would be UTM zone 18.
20  *
21  * \return int cartographic zone
22  */
23 
24 int G_zone(void)
25 {
26  struct Cell_head window;
27 
28  G_get_set_window(&window);
29 
30  return window.zone;
31 }
void G_get_set_window(struct Cell_head *)
Get the current working window (region)
2D/3D raster map header (used also for region)
Definition: gis.h:437
int zone
Projection zone (UTM)
Definition: gis.h:471
int G_zone(void)
Query cartographic zone.
Definition: zone.c:24