remove_areas.c File Reference

Vector library - clean geometry (remove small areas) More...

#include <stdlib.h>
#include <grass/vector.h>
#include <grass/glocale.h>

Include dependency graph for remove_areas.c:

Go to the source code of this file.

Functions
int	Vect_remove_small_areas_nat (struct Map_info *, double, struct Map_info *, double *)
int	Vect_remove_small_areas_ext (struct Map_info *, double, struct Map_info *, double *)
int	Vect_remove_small_areas (struct Map_info *Map, double thresh, struct Map_info *Err, double *removed_area)
	Remove small areas from the map map. More...

Detailed Description

Vector library - clean geometry (remove small areas)

Higher level functions for reading/writing/manipulating vectors.

(C) 2001-2009 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

Radim Blazek, Markus Metz

Definition in file remove_areas.c.

Function Documentation

Vect_remove_small_areas()

int Vect_remove_small_areas	(	struct Map_info *	Map,
		double	thresh,
		struct Map_info *	Err,
		double *	removed_area
	)

Remove small areas from the map map.

Centroid of the area and the longest boundary with adjacent area is removed. Map topology must be built GV_BUILD_CENTROIDS.

Parameters

[in,out]	Map	vector map
	thresh	maximum area size for removed areas
[out]	Err	vector map where removed lines and centroids are written
	removed_area	pointer to where total size of removed area is stored or NULL

Returns

number of removed areas

Definition at line 41 of file remove_areas.c.

References Map_info::format, GV_FORMAT_NATIVE, Vect_remove_small_areas_ext(), and Vect_remove_small_areas_nat().

Vect_remove_small_areas_ext()

int Vect_remove_small_areas_ext	(	struct Map_info *	Map,
		double	thresh,
		struct Map_info *	Err,
		double *	removed_area
	)

Definition at line 51 of file remove_areas.c.

Referenced by Vect_remove_small_areas().

Vect_remove_small_areas_nat()

int Vect_remove_small_areas_nat	(	struct Map_info *	Map,
		double	thresh,
		struct Map_info *	Err,
		double *	removed_area
	)

Definition at line 200 of file remove_areas.c.

Referenced by Vect_remove_small_areas().