[gdal-dev] Clarification of OGR write tutorial code

[Tim Keitt]

I made my first foray into OGR today and want to be sure I understand
the following code from the tutorial.

In particular, I am wondering why the feature is created and destroyed
in each loop. Could one instead create a single feature object and
simply update its x and y values repeatedly? Clearly the feature
created in the layer does not reference poFeature, because it is
destroyed, right?  Can the OGRFeature::CreateFeature and
OGRFeature::DestroyFeature calls be moved outside the loop?

Thanks.

THK

  while( !feof(stdin)
           && fscanf( stdin, "%lf,%lf,%32s", &x, &y, szName ) == 3 )
    {
        OGRFeature *poFeature;

        poFeature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() );
        poFeature->SetField( "Name", szName );

        OGRPoint pt;

        pt.setX( x );
        pt.setY( y );

        poFeature->SetGeometry( &pt );

        if( poLayer->CreateFeature( poFeature ) != OGRERR_NONE )
        {
           printf( "Failed to create feature in shapefile.\n" );
           exit( 1 );
        }

         OGRFeature::DestroyFeature( poFeature );
    }


-- 
Timothy H. Keitt
http://www.keittlab.org/