You need to do a CreateField() on your destination, something like:
poFDefn = poLayer->GetLayerDefn();
for( int iField = 0; iField < poFDefn->GetFieldCount(); iField++ ){
OGRFieldDefn *poFieldDefn = poFDefn->GetFieldDefn( iField );
if( poDstLayer->CreateField( poFieldDefn ) != OGRERR_NONE ){
printf( "Creation of field failed.\n" );
}
}
Best Regards,
Brent Fraser
On 12/4/2012 4:53 AM, SIVA RAMA KRISHNA wrote:
To All,
I am using the following code for creating a shape file from another
with the attributes value;
i am unable to fetch attribute values from source and change the
features from newly created
shape files
Any Sort of help is greatly appriciated
#include "main.h"
#include<QList>
#include<QStringList>
#include<QDebug>
//OGRFeature* TranslateFeature(OGRFeature* poSrcFeature,OGRFeatureDefn
*poFeatureDefn);
OGRLayer *poSrcLayer;
OGRLayer *poDstLayer;
OGRDataSource *poDS;
OGRDataSource *poODS=NULL;
OGRFeature *poDstFeature;
OGRFeature *poSrcFeature;
OGRFeatureDefn *poFeatureDefn;
int main()
{
int iField;
const char *pszDriverName = "ESRI Shapefile";
OGRSFDriver *poDriver;
OGRRegisterAll();
QList<double>fieldid;
QList<QString>fieldname;
const char* str="indiaaa" ;
poDriver = OGRSFDriverRegistrar::GetRegistrar()->GetDriverByName(
pszDriverName );
if( poDriver == NULL )
{
printf( "%s driver not available.\n", pszDriverName );
exit( 1 );
}
poDS = poDriver->Open( "/home/support/Images/IND_adm
(3)/IND_adm1.shp" );
poSrcLayer=poDS->GetLayerByName("IND_adm1");
poDriver->DeleteDataSource("firsts1.shp");
poODS = poDriver->CreateDataSource( "firsts1.shp", NULL );
poDstLayer = poODS->CreateLayer( "firsts1",NULL,wkbPolygon);
poSrcLayer->ResetReading();
int i;
OGRGeometry *poGeometry;
// OGRGeometry *bufferGeometry;
poDstFeature =
OGRFeature::CreateFeature(poDstLayer->GetLayerDefn());
poDstLayer->CreateFeature(poDstFeature);
poSrcFeature=poSrcLayer->GetNextFeature();
do{
i=1;
OGRFeatureDefn *poFDefn = poSrcLayer->GetLayerDefn();
int iField;
for( iField = 0; iField < poFDefn->GetFieldCount();
iField++ )
{
qDebug()<<"fieldcount"<<poFDefn->GetFieldCount();
printf("\n");
OGRFieldDefn *poFieldDefn =
poFDefn->GetFieldDefn( iField );
if( poFieldDefn->GetType() == OFTInteger )
{
printf( "%d,",
poSrcFeature->GetFieldAsInteger( iField ) );
}
else if( poFieldDefn->GetType() == OFTReal )
{
printf( "%.3f,",
poSrcFeature->GetFieldAsDouble(iField) );
fieldid.append(poSrcFeature->GetFieldAsDouble( iField ));
}
else if( poFieldDefn->GetType() == OFTString )
{
printf( "%s, Name",
poSrcFeature->GetFieldAsString(iField) );
fieldname.append(poSrcFeature->GetFieldAsString(iField));
}
else
{
printf( "%s,name1",
poSrcFeature->GetFieldAsString(iField) );
fieldname.append(poSrcFeature->GetFieldAsString(iField));
}
}
poGeometry=poSrcFeature->GetGeometryRef();
poDstFeature->SetGeometryDirectly(poGeometry);
poDstLayer->CreateFeature(poDstFeature);
poDstFeature->SetFID(100);
// poDstFeature->SetField(i,str); // this is not
modifying
// i++;
// //poDstFeature->SetFrom(poSrcFeature,true);
}while( (poSrcFeature = poSrcLayer->GetNextFeature()) != NULL );
poDstLayer->ResetReading();
qDebug()<<"size"<<fieldname.size();
OGRDataSource::DestroyDataSource(poODS);
}
_______________________________________________
gdal-dev mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/gdal-dev
_______________________________________________
gdal-dev mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/gdal-dev
