GRASS GIS 7 Programmer's Manual
7.9.dev(2021)-e5379bbd7
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GProj Library - Functions for manipulating co-ordinate system representations. More...
#include <grass/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <grass/gis.h>
#include <grass/gprojects.h>
#include <grass/glocale.h>
#include <cpl_csv.h>
#include "local_proto.h"
Go to the source code of this file.
Macros | |
#define | CSVDIR "/etc/proj/ogr_csv" |
Functions | |
char * | GPJ_grass_to_wkt (const struct Key_Value *proj_info, const struct Key_Value *proj_units, int esri_style, int prettify) |
Converts a GRASS co-ordinate system representation to WKT style. More... | |
char * | GPJ_grass_to_wkt2 (const struct Key_Value *proj_info, const struct Key_Value *proj_units, const struct Key_Value *proj_epsg, int esri_style, int prettify) |
Converts a GRASS co-ordinate system representation to WKT style. EPSG code is preferred if available. More... | |
OGRSpatialReferenceH | GPJ_grass_to_osr (const struct Key_Value *proj_info, const struct Key_Value *proj_units) |
Converts a GRASS co-ordinate system to an OGRSpatialReferenceH object. More... | |
OGRSpatialReferenceH | GPJ_grass_to_osr2 (const struct Key_Value *proj_info, const struct Key_Value *proj_units, const struct Key_Value *proj_epsg) |
Converts a GRASS co-ordinate system to an OGRSpatialReferenceH object. EPSG code is preferred if available. More... | |
int | GPJ_osr_to_grass (struct Cell_head *cellhd, struct Key_Value **projinfo, struct Key_Value **projunits, OGRSpatialReferenceH hSRS1, int datumtrans) |
Converts an OGRSpatialReferenceH object to a GRASS co-ordinate system. More... | |
int | GPJ_wkt_to_grass (struct Cell_head *cellhd, struct Key_Value **projinfo, struct Key_Value **projunits, const char *wkt, int datumtrans) |
Converts a WKT projection description to a GRASS co-ordinate system. More... | |
const char * | GPJ_set_csv_loc (const char *name) |
Variables | |
struct gpj_units | gpj_units [] |
GProj Library - Functions for manipulating co-ordinate system representations.
(C) 2003-2018 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.
Definition in file convert.c.
#define CSVDIR "/etc/proj/ogr_csv" |
Definition at line 31 of file convert.c.
Referenced by GPJ_set_csv_loc().
OGRSpatialReferenceH GPJ_grass_to_osr | ( | const struct Key_Value * | proj_info, |
const struct Key_Value * | proj_units | ||
) |
Converts a GRASS co-ordinate system to an OGRSpatialReferenceH object.
proj_info | Set of GRASS PROJ_INFO key/value pairs |
proj_units | Set of GRASS PROJ_UNIT key/value pairs |
Definition at line 170 of file convert.c.
References pj_info::wkt.
Referenced by GPJ_grass_to_osr2().
OGRSpatialReferenceH GPJ_grass_to_osr2 | ( | const struct Key_Value * | proj_info, |
const struct Key_Value * | proj_units, | ||
const struct Key_Value * | proj_epsg | ||
) |
Converts a GRASS co-ordinate system to an OGRSpatialReferenceH object. EPSG code is preferred if available.
The co-ordinate system definition is imported from EPSG (by GDAL) definition if available. TOWGS84 parameter is scanned from PROJ_INFO file and appended to co-ordinate system definition. If EPSG code is not available, PROJ_INFO file is used as GPJ_grass_to_osr() does.
proj_info | Set of GRASS PROJ_INFO key/value pairs |
proj_units | Set of GRASS PROJ_UNIT key/value pairs |
proj_epsg | Set of GRASS PROJ_EPSG key/value pairs |
Definition at line 361 of file convert.c.
References G_find_key_value(), G_free_tokens(), G_number_of_tokens(), G_tokenize(), GPJ_grass_to_osr(), and NULL.
char* GPJ_grass_to_wkt | ( | const struct Key_Value * | proj_info, |
const struct Key_Value * | proj_units, | ||
int | esri_style, | ||
int | prettify | ||
) |
Converts a GRASS co-ordinate system representation to WKT style.
Takes a GRASS co-ordinate system as specified by two sets of key/value pairs derived from the PROJ_INFO and PROJ_UNITS files, and converts it to the 'Well Known Text' format.
proj_info | Set of GRASS PROJ_INFO key/value pairs |
proj_units | Set of GRASS PROJ_UNIT key/value pairs |
esri_style | boolean Output ESRI-style WKT (Use OSRMorphToESRI() function provided by OGR library) |
prettify | boolean Use linebreaks and indents to 'prettify' output WKT string (Use OSRExportToPrettyWkt() function in OGR) |
char* GPJ_grass_to_wkt2 | ( | const struct Key_Value * | proj_info, |
const struct Key_Value * | proj_units, | ||
const struct Key_Value * | proj_epsg, | ||
int | esri_style, | ||
int | prettify | ||
) |
Converts a GRASS co-ordinate system representation to WKT style. EPSG code is preferred if available.
Takes a GRASS co-ordinate system as specified key/value pairs derived from the PROJ_EPSG file. TOWGS84 parameter is scanned from PROJ_INFO file and appended to co-ordinate system definition imported from EPSG code by GDAL library. PROJ_UNITS file is ignored. The function converts it to the 'Well Known Text' format.
proj_info | Set of GRASS PROJ_INFO key/value pairs |
proj_units | Set of GRASS PROJ_UNIT key/value pairs |
proj_epsg | Set of GRASS PROJ_EPSG key/value pairs |
esri_style | boolean Output ESRI-style WKT (Use OSRMorphToESRI() function provided by OGR library) |
prettify | boolean Use linebreaks and indents to 'prettify' output WKT string (Use OSRExportToPrettyWkt() function in OGR) |
int GPJ_osr_to_grass | ( | struct Cell_head * | cellhd, |
struct Key_Value ** | projinfo, | ||
struct Key_Value ** | projunits, | ||
OGRSpatialReferenceH | hSRS1, | ||
int | datumtrans | ||
) |
Converts an OGRSpatialReferenceH object to a GRASS co-ordinate system.
cellhd | Pointer to a GRASS Cell_head structure that will have its projection-related members populated with appropriate values |
projinfo | Pointer to a pointer which will have a GRASS Key_Value structure allocated containing a set of GRASS PROJ_INFO values |
projunits | Pointer to a pointer which will have a GRASS Key_Value structure allocated containing a set of GRASS PROJ_UNITS values |
hSRS | OGRSpatialReferenceH object containing the co-ordinate system to be converted |
datumtrans | Index number of datum parameter set to use, 0 to leave unspecified |
Definition at line 422 of file convert.c.
References _, G_create_key_value(), G_debug(), G_find_key_value(), G_free(), G_gisbase(), G_lookup_key_value_from_file(), G_set_key_value(), G_store(), G_strcasecmp(), G_warning(), GPJ__get_datum_params(), list, name, NULL, Cell_head::proj, PROJECTION_LL, PROJECTION_OTHER, PROJECTION_UTM, and Cell_head::zone.
Referenced by GPJ_wkt_to_grass().
const char* GPJ_set_csv_loc | ( | const char * | name | ) |
Definition at line 997 of file convert.c.
References CSVDIR, G_asprintf(), G_free(), G_gisbase(), and NULL.
int GPJ_wkt_to_grass | ( | struct Cell_head * | cellhd, |
struct Key_Value ** | projinfo, | ||
struct Key_Value ** | projunits, | ||
const char * | wkt, | ||
int | datumtrans | ||
) |
Converts a WKT projection description to a GRASS co-ordinate system.
cellhd | Pointer to a GRASS Cell_head structure that will have its projection-related members populated with appropriate values |
projinfo | Pointer to a pointer which will have a GRASS Key_Value structure allocated containing a set of GRASS PROJ_INFO values |
projunits | Pointer to a pointer which will have a GRASS Key_Value structure allocated containing a set of GRASS PROJ_UNITS values |
wkt | Well-known Text (WKT) description of the co-ordinate system to be converted |
datumtrans | Index number of datum parameter set to use, 0 to leave unspecified |
Definition at line 965 of file convert.c.
References GPJ_osr_to_grass(), and NULL.
struct gpj_units gpj_units[] |