overlap.c

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00001 /*
00002 ****************************************************************************
00003 *
00004 * MODULE:       Vector library 
00005 *               
00006 * AUTHOR(S):    Original author CERL, probably Dave Gerdes or Mike Higgins.
00007 *               Update to GRASS 5.7 Radim Blazek and David D. Gray.
00008 *
00009 * PURPOSE:      Higher level functions for reading/writing/manipulating vectors.
00010 *
00011 * COPYRIGHT:    (C) 2001 by the GRASS Development Team
00012 *
00013 *               This program is free software under the GNU General Public
00014 *               License (>=v2). Read the file COPYING that comes with GRASS
00015 *               for details.
00016 *
00017 *****************************************************************************/
00018 #include <grass/gis.h>
00019 #include <grass/Vect.h>
00020 
00021 int 
00022 V__map_overlap (
00023                  struct Map_info *Map,
00024                  double n, double s,
00025                  double e, double w)
00026 {
00027   struct Cell_head W;
00028 
00029   /* updated for Lat lon support 21 Jun 91 */
00030   W.north = Map->Constraint_N;
00031   W.south = Map->Constraint_S;
00032   W.east = Map->Constraint_E;
00033   W.west = Map->Constraint_W;
00034   W.proj = Map->proj;
00035 
00036   return G_window_overlap (&W, n, s, e, w);
00037 }
00038 

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