proj2.c

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/*!
   \file lib/gis/proj2.c
 
   \brief GIS Library - Projection support (internal subroutines)
 
   (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>
#include <grass/glocale.h>
 
/*!
   \brief Get projection units code (for internal use only)
 
   \param n projection code
 
   Supported units (see gis.h):
   - U_UNKNOWN (XY)
   - U_METERS  (UTM)
   - U_FEET    (SP)
   - U_USFEET (a few SP)
   - U_DEGREES (LL)
 
   \return units code (see gis.h)
   \return U_UNDEFINED if not defined
 */
int G_projection_units(int n)
{
    switch (n) {
    case PROJECTION_XY:
        return U_UNKNOWN;
    case PROJECTION_UTM:
        return U_METERS;
    case PROJECTION_LL:
        return U_DEGREES;
    default:
        return U_UNDEFINED;
    }
    return U_UNDEFINED;
}
 
/*!
   \brief Get projection name
 
   \param n projection code
 
   \return projection name
   \return NULL on error
 */
const char *G_projection_name(int n)
{
    switch (n) {
    case PROJECTION_XY:
        return "x,y";
    case PROJECTION_UTM:
        return "UTM";
    case PROJECTION_LL:
        return _("Latitude-Longitude");
    case PROJECTION_OTHER:
        return _("Other Projection");
    default:
        return NULL;
    }
}