area_pg.c File Reference

Vector library - area-related functions (PostGIS Topology) More...

#include <grass/vector.h>
#include "pg_local_proto.h"

Include dependency graph for area_pg.c:

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Functions
int	Vect__get_area_points_pg (const struct Map_info *Map, const plus_t *lines, int n_lines, struct line_pnts *APoints)
	Get area boundary points (PostGIS Topology) More...

Detailed Description

Vector library - area-related functions (PostGIS Topology)

Higher level functions for reading/writing/manipulating vectors.

(C) 2013 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

Martin Landa <landa.martin gmail.com>

Definition in file area_pg.c.

Function Documentation

Vect__get_area_points_pg()

int Vect__get_area_points_pg	(	const struct Map_info *	Map,
		const plus_t *	lines,
		int	n_lines,
		struct line_pnts *	APoints
	)

Get area boundary points (PostGIS Topology)

Used by Vect_build_line_area() and Vect_get_area_points().

Parameters

	Map	pointer to Map_info struct
	lines	array of boundary lines
	n_lines	number of lines in array
[out]	APoints	pointer to output line_pnts struct

Returns

number of points

-1 on error

Definition at line 36 of file area_pg.c.

References Map_info::fInfo, Format_info::pg, Format_info_pg::res, and Vect_reset_line().

Referenced by Vect__get_area_points(), and Vect_get_isle_points().