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/******************************************************************************
*
* Project: libgrass
* Purpose: Function to create a new location automatically given a
* "Cell_head", PROJ_INFO and PROJ_UNITS information.
* Author: Frank Warmerdam, warmerda@pobox.com
*
******************************************************************************
* Copyright (c) 2000, Frank Warmerdam
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
******************************************************************************
*
*/
#include "gis.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
/*
* Returns 0 on success.
* Returns -1 to indicate a system error (check errno).
*/
int G__make_location(
char *location_name,
struct Cell_head *wind,
struct Key_Value *proj_info,
struct Key_Value *proj_units,
FILE *report_file )
{
char path[2048];
int out_stat;
/* Try to create the location directory, under the gisdbase. */
sprintf( path, "%s/%s", G_gisdbase(), location_name );
if( mkdir( path, 0775 ) != 0 )
return -1;
/* Make the PERMANENT mapset. */
sprintf( path, "%s/%s/%s", G_gisdbase(), location_name, "PERMANENT" );
if( mkdir( path, 0775 ) != 0 )
return -1;
/* make these the new current location and mapset */
G__setenv( "LOCATION_NAME", location_name );
G__setenv( "MAPSET", "PERMANENT" );
/* Create the default, and current window files */
G__put_window( wind, "", "DEFAULT_WIND" );
G__put_window( wind, "", "WIND" );
/* Write out the PROJ_INFO, and PROJ_UNITS if available. */
if( proj_info != NULL )
{
G__file_name( path, "", "PROJ_INFO", "PERMANENT" );
G_write_key_value_file( path, proj_info, &out_stat );
if( out_stat != 0 )
return -2;
}
if( proj_units != NULL )
{
G__file_name( path, "", "PROJ_UNITS", "PERMANENT" );
G_write_key_value_file( path, proj_units, &out_stat );
if( out_stat != 0 )
return -2;
}
return 0;
}
int G_make_location(
char *location_name,
struct Cell_head *wind,
struct Key_Value *proj_info,
struct Key_Value *proj_units,
FILE *report_file )
{
int err;
err = G__make_location( location_name, wind, proj_info, proj_units,
report_file );
if( err == 0 )
return 0;
if( err == -1 )
{
perror( "G_make_location" );
}
G_fatal_error( "G_make_location failed." );
return 1;
}
/************************************************************************/
/* G_compare_projections() */
/************************************************************************/
int
G_compare_projections( struct Key_Value *proj_info1,
struct Key_Value *proj_units1,
struct Key_Value *proj_info2,
struct Key_Value *proj_units2 )
{
char buf1[512], buf2[512];
if( proj_info1 == NULL && proj_info2 == NULL )
return TRUE;
/* -------------------------------------------------------------------- */
/* Are they both in the same projection? */
/* -------------------------------------------------------------------- */
if( G_find_key_value( "proj", proj_info1 ) != NULL
&& G_find_key_value( "meters", proj_units1 ) != NULL
&& atof(G_find_key_value( "meters", proj_units1 ))
!= atof(G_find_key_value( "meters", proj_units2 )) )
return -1;
/* -------------------------------------------------------------------- */
/* Verify that the linear unit translation to meters is OK. */
/* -------------------------------------------------------------------- */
if( proj_units1 != NULL && proj_units2 != NULL
&& G_find_key_value( "meters", proj_units1 ) != NULL
&& G_find_key_value( "meters", proj_units2 ) != NULL
&& atof(G_find_key_value( "meters", proj_units1 ))
!= atof(G_find_key_value( "meters", proj_units2 )) )
return -2;
/* -------------------------------------------------------------------- */
/* Do they both have the same ellipsoid? */
/* Lets just check the semi-major axis for now to keep it simple */
/* -------------------------------------------------------------------- */
{
double a1=0, a2=0;
if(G_find_key_value( "a", proj_info1) != NULL)
a1 = atof(G_find_key_value( "a", proj_info1 ));
if(G_find_key_value( "a", proj_info2) != NULL)
a2 = atof(G_find_key_value( "a", proj_info2 ));
if ( a1 && a2 && ( abs(a2-a1) > 0.000001 ) )
return -4;
}
/* -------------------------------------------------------------------- */
/* Zone check specially for UTM */
/* -------------------------------------------------------------------- */
{
if( G_find_key_value( "proj", proj_info1 ) == "utm"
&& G_find_key_value( "proj", proj_info2 ) == "utm"
&& atof(G_find_key_value( "zone", proj_info1 ))
!= atof(G_find_key_value( "zone", proj_info2 )) )
return -5;
}
/* -------------------------------------------------------------------- */
/* Add more details in later. */
/* -------------------------------------------------------------------- */
return TRUE;
}
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