Vector library - write vector feature (PostGIS format) More...

#include <string.h>
#include <grass/vector.h>
#include <grass/glocale.h>
#include "local_proto.h"
#include "pg_local_proto.h"

Include dependency graph for write_pg.c:

Go to the source code of this file.

Macros
#define	WKBSRIDFLAG 0x20000000

#define	TOPOGEOM_COLUMN "topo"

#define	USE_TOPO_STMT 0

Functions
off_t	V1_write_line_pg (struct Map_info Map, int type, const struct line_pnts points, const struct line_cats *cats)
	Writes feature on level 1 (PostGIS interface) More...

off_t	V2_write_line_pg (struct Map_info Map, int type, const struct line_pnts points, const struct line_cats *cats)
	Writes feature on topological level (PostGIS interface) More...

off_t	V1_rewrite_line_pg (struct Map_info Map, off_t offset, int type, const struct line_pnts points, const struct line_cats *cats)
	Rewrites feature at the given offset (level 1) (PostGIS interface, internal use only) More...

off_t	V2_rewrite_line_pg (struct Map_info Map, off_t line, int type, const struct line_pnts points, const struct line_cats *cats)
	Rewrites feature at topological level (PostGIS interface, internal use only) More...

int	V1_delete_line_pg (struct Map_info *Map, off_t offset)
	Deletes feature at the given offset (level 1) More...

int	V2_delete_line_pg (struct Map_info *Map, off_t line)
	Deletes feature on topological level (PostGIS interface) More...

off_t	V2__write_node_pg (struct Map_info Map, const struct line_pnts points)
	Writes node on topological level (PostGIS Topology interface, internal use only) More...

off_t	V2__write_area_pg (struct Map_info Map, const struct line_pnts points, int nparts, const struct line_cats cats)
	Writes area on topological level (PostGIS Simple Features interface, internal use only) More...

int	V2__update_area_pg (struct Map_info Map, const struct line_pnts *points, int nparts, int cat)
	Updates simple features geometry from GRASS-like topo. More...

int	Vect__define_topo_relation (const struct Format_info_pg *pg_info, int topo_id, int element_id)

int	Vect__insert_face_pg (struct Map_info *Map, int area)
	Insert new face to the 'face' table (topo only) More...

Detailed Description

Vector library - write vector feature (PostGIS format)

Higher level functions for reading/writing/manipulating vectors.

Write subroutine inspired by OGR PostgreSQL driver.

Todo:

PostGIS version of V2__delete_area_cats_from_cidx_nat()

function to delete corresponding entry in fidx

PostGIS version of V2__add_area_cats_to_cidx_nat

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 write_pg.c.

Macro Definition Documentation

◆ TOPOGEOM_COLUMN

#define TOPOGEOM_COLUMN "topo"

Definition at line 34 of file write_pg.c.

◆ USE_TOPO_STMT

#define USE_TOPO_STMT 0

Use SQL statements from PostGIS Topology extension (this options is quite slow. By default are used simple SQL statements (INSERT, UPDATE)

Definition at line 39 of file write_pg.c.

◆ WKBSRIDFLAG

#define WKBSRIDFLAG 0x20000000

Definition at line 32 of file write_pg.c.

Function Documentation

◆ V1_delete_line_pg()

int V1_delete_line_pg	(	struct Map_info *	Map,
		off_t	offset
	)

Deletes feature at the given offset (level 1)

Only for simple feature access. PostGIS Topology requires level 2.

Parameters

Map	pointer Map_info structure
offset	feature offset

Returns: 0 on success; -1 on error

Definition at line 311 of file write_pg.c.

References _, Format_info_offset::array, Format_info_offset::array_num, Format_info_pg::conn, DB_SQL_MAX, Format_info_pg::fid_column, Map_info::fInfo, G_debug(), G_fatal_error(), G_warning(), Format_info_pg::inTransaction, Format_info_pg::offset, Format_info::pg, PRI_OFF_T, Format_info_pg::table_name, TRUE, and Vect__execute_pg().

◆ V1_rewrite_line_pg()

off_t V1_rewrite_line_pg	(	struct Map_info *	Map,
		off_t	offset,
		int	type,
		const struct line_pnts *	points,
		const struct line_cats *	cats
	)

Rewrites feature at the given offset (level 1) (PostGIS interface, internal use only)

Only for simple feature access. PostGIS Topology requires level 2.

Todo:: Use UPDATE statement ?

Parameters

Map	pointer to Map_info structure
offset	feature offset
type	feature type (GV_POINT, GV_LINE, ...)
points	feature geometry
cats	feature categories

Returns: feature offset (rewritten feature); -1 on error

Definition at line 179 of file write_pg.c.

◆ V1_write_line_pg()

off_t V1_write_line_pg	(	struct Map_info *	Map,
		int	type,
		const struct line_pnts *	points,
		const struct line_cats *	cats
	)

Writes feature on level 1 (PostGIS interface)

Notes for simple feature access:

centroids are not supported in PostGIS, pseudotopo holds virtual centroids
boundaries are not supported in PostGIS, pseudotopo treats polygons as boundaries

Notes for PostGIS Topology access:

centroids are stored as isolated nodes
boundaries are stored as edges

Parameters

Map	pointer to Map_info structure
type	feature type (GV_POINT, GV_LINE, ...)
points	pointer to line_pnts structure (feature geometry)
cats	pointer to line_cats structure (feature categories)

Returns: feature offset into file; -1 on error

Definition at line 99 of file write_pg.c.

◆ V2__update_area_pg()

int V2__update_area_pg	(	struct Map_info *	Map,
		const struct line_pnts **	points,
		int	nparts,
		int	cat
	)

Updates simple features geometry from GRASS-like topo.

Parameters

Map	pointer to Map_info structure
points	feature geometry (exterior + interior rings)
nparts	number of parts including exterior ring
cat	area category

Returns: 0 on success; -1 on error

Definition at line 539 of file write_pg.c.

References _, Map_info::fInfo, G_warning(), line_pnts::n_points, Format_info::pg, and x.

◆ V2__write_area_pg()

off_t V2__write_area_pg	(	struct Map_info *	Map,
		const struct line_pnts **	points,
		int	nparts,
		const struct line_cats *	cats
	)

Writes area on topological level (PostGIS Simple Features interface, internal use only)

Parameters

Map	pointer to Map_info structure
points	feature geometry (exterior + interior rings)
nparts	number of parts including exterior ring
cats	feature categories

Returns: feature offset; -1 on error

Definition at line 521 of file write_pg.c.

Referenced by V2__write_area_sfa().

◆ V2__write_node_pg()

off_t V2__write_node_pg	(	struct Map_info *	Map,
		const struct line_pnts *	points
	)

Writes node on topological level (PostGIS Topology interface, internal use only)

The vector map must be open on level 2 at least with GV_BUILD_BASE. PostGIS Topology schema must be defined.

Parameters

Map	pointer to Map_info structure
node	node id (starts at 1)
points	pointer to line_pnts structure

Returns: 0 on success; -1 on error

Definition at line 497 of file write_pg.c.

References Map_info::fInfo, Format_info::pg, and Format_info_pg::toposchema_name.

◆ V2_delete_line_pg()

int V2_delete_line_pg	(	struct Map_info *	Map,
		off_t	line
	)

Deletes feature on topological level (PostGIS interface)

Note: Topology must be built at level >= GV_BUILD_BASE

Calls V2_delete_line_sfa() for simple feature access.

Parameters

Map	pointer to Map_info structure
line	feature id to be deleted

Returns: 0 on success; -1 on error

Definition at line 373 of file write_pg.c.

◆ V2_rewrite_line_pg()

off_t V2_rewrite_line_pg	(	struct Map_info *	Map,
		off_t	line,
		int	type,
		const struct line_pnts *	points,
		const struct line_cats *	cats
	)

Rewrites feature at topological level (PostGIS interface, internal use only)

Note: Topology must be built at level >= GV_BUILD_BASE

Todo:

Handle also categories

Store original geometry in tmp table for restore

Parameters

Map	pointer to Map_info structure
line	feature id
type	feature type (GV_POINT, GV_LINE, ...)
points	feature geometry
cats	feature categories

Returns: offset where feature was rewritten; -1 on error

Definition at line 219 of file write_pg.c.

◆ V2_write_line_pg()

off_t V2_write_line_pg	(	struct Map_info *	Map,
		int	type,
		const struct line_pnts *	points,
		const struct line_cats *	cats
	)

Writes feature on topological level (PostGIS interface)

Calls V2_write_line_sfa() for simple features access.

Parameters

Map	pointer to Map_info structure
type	feature type (GV_POINT, GV_LINE, ...)
points	pointer to line_pnts structure (feature geometry)
cats	pointer to line_cats structure (feature categories)

Returns: feature offset into file; -1 on error

Definition at line 142 of file write_pg.c.

◆ Vect__define_topo_relation()

int Vect__define_topo_relation	(	const struct Format_info_pg *	pg_info,
		int	topo_id,
		int	element_id
	)

Definition at line 2367 of file write_pg.c.

References DB_SQL_MAX.

◆ Vect__insert_face_pg()

int Vect__insert_face_pg	(	struct Map_info *	Map,
		int	area
	)

Insert new face to the 'face' table (topo only)

Parameters

Map	pointer to Map_info struct
area	area id (negative id for isles)

Returns: 0 on error; area id on success (>0)

Definition at line 2497 of file write_pg.c.

References Format_info_pg::conn, bound_box::E, Map_info::fInfo, G_asprintf(), G_debug(), G_free(), bound_box::N, NULL, Format_info::pg, bound_box::S, Format_info_pg::srid, Format_info_pg::toposchema_name, Vect__execute_pg(), Vect_get_area_box(), Vect_get_isle_box(), and bound_box::W.

Macros

Functions

Detailed Description

Macro Definition Documentation

◆ TOPOGEOM_COLUMN

◆ USE_TOPO_STMT

◆ WKBSRIDFLAG

Function Documentation

◆ V1_delete_line_pg()

◆ V1_rewrite_line_pg()

◆ V1_write_line_pg()

◆ V2__update_area_pg()

◆ V2__write_area_pg()

◆ V2__write_node_pg()

◆ V2_delete_line_pg()

◆ V2_rewrite_line_pg()

◆ V2_write_line_pg()

◆ Vect__define_topo_relation()

◆ Vect__insert_face_pg()