ellipse.c File Reference

GProj library - Functions for reading datum parameters from the location database. More...

#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <grass/gis.h>
#include <grass/glocale.h>
#include <grass/gprojects.h>
#include "local_proto.h"

Include dependency graph for ellipse.c:

Go to the source code of this file.

Functions
int	GPJ_get_ellipsoid_params (double *a, double *e2, double *rf)
int	GPJ__get_ellipsoid_params (struct Key_Value *proj_keys, double *a, double *e2, double *rf)
int	GPJ_get_ellipsoid_by_name (const char *name, struct gpj_ellps *estruct)
	looks up ellipsoid in ellipsoid table and returns the a, e2 parameters for the ellipsoid More...
struct ellps_list *	read_ellipsoid_table (int fatal)
void	GPJ_free_ellps (struct gpj_ellps *estruct)
void	free_ellps_list (struct ellps_list *elist)

Detailed Description

GProj library - Functions for reading datum parameters from the location database.

Author

Paul Kelly <paul-grass stjohnspoint.co.uk>

(C) 2003-2008 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 ellipse.c.

Function Documentation

void free_ellps_list

(

struct ellps_list *

elist

)

Definition at line 282 of file ellipse.c.

References G_free(), ellps_list::longname, ellps_list::name, ellps_list::next, NULL, and old.

Referenced by GPJ_get_ellipsoid_by_name(), and GPJ_osr_to_grass().

int GPJ__get_ellipsoid_params	(	struct Key_Value *	proj_keys,
		double *	a,
		double *	e2,
		double *	rf
	)

Definition at line 52 of file ellipse.c.

References G_asprintf(), G_fatal_error(), G_find_key_value(), G_store(), GPJ_free_datum(), GPJ_free_ellps(), GPJ_get_datum_by_name(), GPJ_get_ellipsoid_by_name(), and NULL.

Referenced by GPJ_get_ellipsoid_params(), GPJ_grass_to_osr(), and pj_get_kv().

void GPJ_free_ellps

(

struct gpj_ellps *

estruct

)

Definition at line 275 of file ellipse.c.

References G_free().

Referenced by GPJ__get_ellipsoid_params(), and GPJ_grass_to_osr().

int GPJ_get_ellipsoid_by_name	(	const char *	name,
		struct gpj_ellps *	estruct
	)

looks up ellipsoid in ellipsoid table and returns the a, e2 parameters for the ellipsoid

Returns

1 if ok, -1 if not found in table

Definition at line 131 of file ellipse.c.

References ellps_list::a, ellps_list::es, free_ellps_list(), G_store(), G_strcasecmp(), ellps_list::longname, ellps_list::name, ellps_list::next, NULL, read_ellipsoid_table(), and ellps_list::rf.

Referenced by GPJ__get_ellipsoid_params(), and GPJ_grass_to_osr().

int GPJ_get_ellipsoid_params	(	double *	a,
		double *	e2,
		double *	rf
	)

This routine returns the ellipsoid parameters from the database. If the PROJECTION_FILE exists in the PERMANENT mapset, read info from that file, otherwise return WGS 84 values.

Returns

1 ok, 0 default values used. Dies with diagnostic if there is an error

Definition at line 37 of file ellipse.c.

References G_create_key_value(), G_free_key_value(), G_get_projinfo(), GPJ__get_ellipsoid_params(), and NULL.

struct ellps_list* read_ellipsoid_table

(

int

fatal

)

Definition at line 196 of file ellipse.c.

References ellps_list::a, buf, buf2, count, err, ellps_list::es, fclose(), fd, file, G_fatal_error(), G_getl2(), G_gisbase(), G_store(), G_strcat(), G_strip(), G_warning(), ellps_list::longname, ellps_list::name, render::name, ellps_list::next, NULL, read_ellipsoid_table(), ellps_list::rf, and sprintf().

Referenced by GPJ_get_ellipsoid_by_name(), GPJ_osr_to_grass(), and read_ellipsoid_table().