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| /*****************************************************************************
* ogr2gui is an application used to convert and manipulate geospatial
* data. It is based on the "OGR Simple Feature Library" from the
* "Geospatial Data Abstraction Library" <http://gdal.org>.
*
* Copyright (c) 2009 Inventis <mailto:developpement@inventis.ca>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*****************************************************************************/
/*!
* \file Ogr.h
* \brief OGR C API
* \author Olivier Pilotte [ Inventis ]
* \version 0.5
* \date 13/01/09
*/
#ifndef OGR
#define OGR
/*!
* \class Ogr
* \brief OGR C API
* \author Olivier Pilotte
*/
class Ogr
{
private :
OGRSFDriverH formatDriver;
OGRDataSourceH sourceData;
OGRDataSourceH targetData;
OGRLayerH squeryLayer;
OGRLayerH sourceLayer;
OGRLayerH targetLayer;
OGRSpatialReferenceH sourceSRS;
OGRSpatialReferenceH targetSRS;
OGRFeatureDefnH sourceLayerDefn;
OGRwkbGeometryType sourceLayerGeom;
OGRGeometryH sourceGeom;
string sourceName;
string sourceLayerName;
string targetName;
string error;
/*!
* \fn bool Error( OGRErr e, string &s );
* \brief OGR errors
* \param e : OGR error
* \param &s : error text
* \returns true if error
*/
bool Error( OGRErr e, string &s );
public :
/*!
* \fn Ogr( void );
* \brief Constructor
*/
Ogr( void );
/*!
* \fn ~Ogr( void );
* \brief Destructor
*/
~Ogr( void );
/*!
* \fn bool OpenSource( string filename, string &epsg = 0, string &query = 0, string &error = 0 );
* \brief Opens source data
* \param filename : source filename
* \param &epsg : epsg code
* \param &query : sql query
* \param &error : error text
* \returns true on success
*/
bool OpenSource( string filename, string &epsg, string &query, string &error );
/*!
* \fn bool CloseSource( void );
* \brief Closes source data
* \returns true on success
*/
bool CloseSource( void );
/*!
* \fn bool OpenDriver( string drivername, string error = 0 );
* \brief Opens target driver
* \param drivername : selected driver
* \param error : error text
* \returns true on success
*/
bool OpenDriver( string drivername, string error = 0 );
/*!
* \fn bool OpenTarget( string filename, int projection = 0, bool update = 0 );
* \brief Opens target
* \param filename : target filename
* \param projection : epsg code
* \param update : update mode
* \returns true on success
*/
bool OpenTarget( string filename, int projection = 0, bool update = 0 );
/*!
* \fn bool CloseTarget( void );
* \brief Closes Target
* \returns true on success
*/
bool CloseTarget( void );
/*!
* \fn bool Execute( string query = 0 );
* \brief Execute conversion
* \param query : source sql query
* \returns true on success
*/
bool Execute( string query = 0 );
/*!
* \fn bool Prepare( int &nbFeat, string query );
* \brief Prepare data for conversion
* \param nbFeat : number of features
* \param query : source sql query
* \returns true on success
*/
bool Prepare( int &nbFeat, string query );
/*!
* \fn bool Process( void );
* \brief Process a feature
* \returns true on success
*/
bool Process( void );
};
#endif
[ code!]
classe Ogr.cpp
/*****************************************************************************
* ogr2gui is an application used to convert and manipulate geospatial
* data. It is based on the "OGR Simple Feature Library" from the
* "Geospatial Data Abstraction Library" <http://gdal.org>.
*
* Copyright (c) 2009 Inventis <mailto:developpement@inventis.ca>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*****************************************************************************/
/*!
* \file Ogr.cpp
* \brief OGR C API
* \author Olivier Pilotte [ Inventis ]
* \version 0.5
* \date 13/01/09
*/
#include "ogr_api.h"
#include "ogr_srs_api.h"
#include <string>
#include <sys/stat.h>
using std::string;
#include "../inc/Ogr.h"
Ogr::Ogr( void )
{
OGRRegisterAll();
}
Ogr::~Ogr( void )
{
}
bool Ogr::OpenSource( string filename, string &epsg, string &query, string &error )
{
sourceSRS = NULL;
sourceName = filename;
sourceData = OGROpen( sourceName.c_str(), 0, NULL );
if( sourceData != NULL )
{
sourceLayer = OGR_DS_GetLayer( sourceData, 0 );
if( sourceLayer != NULL )
{
sourceLayerDefn = OGR_L_GetLayerDefn( sourceLayer );
sourceLayerName = OGR_FD_GetName( sourceLayerDefn );
sourceLayerGeom = OGR_FD_GetGeomType( sourceLayerDefn );
sourceGeom = OGR_L_GetSpatialFilter( sourceLayer );
sourceSRS = OGR_L_GetSpatialRef( sourceLayer );
if( sourceSRS != NULL && ! Error( OSRAutoIdentifyEPSG( sourceSRS ), error ) )
{
epsg = OSRGetAttrValue( sourceSRS, "AUTHORITY", 1 );
}
else
{
error = "unable to open source spatial reference";
}
query = "SELECT * FROM " + sourceLayerName;
}
else
{
error = "unable to open source layer";
return false;
}
}
else
{
error = "unable to open source data";
return false;
}
return true;
}
bool Ogr::CloseSource( void )
{
if( sourceData != NULL )
{
OGR_DS_Destroy( sourceData );
}
else
{
return false;
}
return true;
}
bool Ogr::OpenDriver( string drivername, string error )
{
formatDriver = OGRGetDriverByName( drivername.c_str() );
if( formatDriver == NULL )
{
error = "unable to find driver";
return false;
}
return true;
}
bool Ogr::OpenTarget( string filename, int projection, bool update )
{
struct stat fileInfo;
targetSRS = NULL;
targetName = filename;
if( projection > 0 )
{
targetSRS = OSRNewSpatialReference( NULL );
if( Error( OSRImportFromEPSG( targetSRS, projection ), error ) )
{
error.insert( 0, "unable to create spatial reference : " );
}
}
if( update )
{
if( stat( targetName.c_str(), &fileInfo ) == 0 )
{
targetData = OGR_Dr_Open( formatDriver, targetName.c_str(), 1 );
}
else
{
error = "file doesn't exist";
return false;
}
}
else
{
if( stat( targetName.c_str(), &fileInfo ) == 0 )
{
if( remove( targetName.c_str() ) != 0 )
{
error = "unable to delete source data";
}
}
targetData = OGR_Dr_CreateDataSource( formatDriver, targetName.c_str(), 0 );
}
if( targetData != NULL )
{
if( update )
{
targetLayer = OGR_DS_GetLayer( targetData, 0 );
}
else
{
if( targetSRS != NULL )
{
targetLayer = OGR_DS_CreateLayer( targetData, sourceLayerName.c_str(), targetSRS, sourceLayerGeom, NULL );
}
else
{
targetLayer = OGR_DS_CreateLayer( targetData, sourceLayerName.c_str(), sourceSRS, sourceLayerGeom, NULL );
}
}
}
else
{
error = "unable to create target data";
return false;
}
return true;
}
bool Ogr::CloseTarget( void )
{
if( targetData != NULL )
{
OGR_DS_Destroy( targetData );
}
else
{
return false;
}
return true;
}
bool Ogr::Execute( string query )
{
int featuresCount = 0;
if( Prepare( featuresCount, query ) )
{
while( Process() );
CloseTarget();
CloseSource();
}
else
{
return false;
}
return true;
}
bool Ogr::Prepare( int &featuresCount, string query )
{
OGRFeatureDefnH featDefn = OGR_L_GetLayerDefn( sourceLayer );
for( int i = 0; i < OGR_FD_GetFieldCount( sourceLayerDefn ); i ++ )
{
OGRFieldDefnH field = OGR_FD_GetFieldDefn( featDefn, i );
if( Error( OGR_L_CreateField( targetLayer, field, 0 ), error ) )
{
return false;
}
}
if( query.size() > 0 )
{
OGRLayerH squeryLayer = OGR_DS_ExecuteSQL( sourceData, query.c_str(), NULL, "" );
if( squeryLayer != NULL )
{
sourceLayer = squeryLayer;
}
}
OGR_L_ResetReading( sourceLayer );
featuresCount = OGR_L_GetFeatureCount( sourceLayer, 1 );
return true;
}
bool Ogr::Process( void )
{
OGRFeatureH feature;
if( ( ( feature = OGR_L_GetNextFeature( sourceLayer ) ) != NULL ) )
{
if( targetSRS )
{
Error( OGR_G_TransformTo( OGR_F_GetGeometryRef( feature ), targetSRS ), error );
}
Error( OGR_L_CreateFeature( targetLayer, feature ), error );
OGR_F_Destroy( feature );
}
else
{
return false;
}
return true;
}
bool Ogr::Error( OGRErr code, string &type )
{
switch( code )
{
case OGRERR_NONE :
{
return false;
}
break;
case OGRERR_NOT_ENOUGH_DATA :
{
type = "not enough data";
}
break;
case OGRERR_NOT_ENOUGH_MEMORY :
{
type = "not enough memory";
}
break;
case OGRERR_UNSUPPORTED_GEOMETRY_TYPE :
{
type = "unsupported geometry type";
}
break;
case OGRERR_UNSUPPORTED_OPERATION :
{
type = "unsupported operation";
}
break;
case OGRERR_CORRUPT_DATA :
{
type = "corrupt data";
}
break;
case OGRERR_FAILURE :
{
type = "failure";
}
break;
case OGRERR_UNSUPPORTED_SRS :
{
type = "unsupported srs";
}
break;
default :
{
type = "unknown";
}
break;
}
return true;
} |
prbleme constructeur :erreur: «Ogr::Ogr()» previously defined here
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