read_sfa.c File Reference

Vector library - reading features - simple feature access. More...

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

Include dependency graph for read_sfa.c:

Go to the source code of this file.

Functions
int	V2_read_line_sfa (struct Map_info *Map, struct line_pnts *line_p, struct line_cats *line_c, int line)
	Reads feature from OGR/PostGIS layer on topological level. More...

Detailed Description

Vector library - reading features - simple feature access.

Higher level functions for reading/writing/manipulating vectors.

See read_ogr.c (OGR interface) and read_pg.c (PostGIS interface) for implementation issues.

(C) 2011-2012 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 read_sfa.c.

Function Documentation

V2_read_line_sfa()

int V2_read_line_sfa	(	struct Map_info *	Map,
		struct line_pnts *	line_p,
		struct line_cats *	line_c,
		int	line
	)

Reads feature from OGR/PostGIS layer on topological level.

This function implements random access on level 2.

Note: Topology must be built at level >= GV_BUILD_BASE

Parameters

	Map	pointer to Map_info structure
[out]	line_p	container used to store line points within (pointer to line_pnts struct)
[out]	line_c	container used to store line categories within (pointer to line_cats struct)
	line	feature id (starts at 1)

Returns

feature type

-2 no more features

-1 on failure

Definition at line 40 of file read_sfa.c.