GRASS GIS 8 Programmer's Manual 8.4.1(2025)-45ca3179ab
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proj1.c File Reference

GIS Library - Projection support (window related) More...

#include <grass/gis.h>
Include dependency graph for proj1.c:

Go to the source code of this file.

Functions

int G_projection (void)
 Query cartographic projection.
 

Detailed Description

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

Definition in file proj1.c.

Function Documentation

◆ G_projection()

int G_projection ( void )

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.

Returns
projection code (see above)

Definition at line 32 of file proj1.c.

References G_get_set_window().

Referenced by G_begin_distance_calculations(), G_begin_polygon_area_calculations(), G_database_projection_name(), G_database_unit(), G_get_3dview(), G_get_projepsg(), G_get_projinfo(), G_get_projsrid(), G_get_projunits(), G_get_projwkt(), and G_shortest_way().