C++ (Cpp) QgsRasterLayer::setCrs Examples

Example #1

File: qgshostedrdsbuilder.cpp Project: RealworldSystems/Quantum-GIS

QgsMapLayer* QgsHostedRDSBuilder::createMapLayer( const QDomElement& elem, const QString& layerName, QList<QTemporaryFile*>& filesToRemove, QList<QgsMapLayer*>& layersToRemove, bool allowCaching ) const
{
  QgsMSDebugMsg( "entering." );

  if ( elem.isNull() )
  {
    return 0;
  }

  QString uri = elem.attribute( "uri", "not found" );
  if ( uri == "not found" )
  {
    QgsMSDebugMsg( "Uri not found" );
    return 0;
  }
  else
  {
    QgsMSDebugMsg( "Trying to get hostedrds layer from cache with uri: " + uri );
    QgsRasterLayer* rl = 0;
    if ( allowCaching )
    {
      rl = dynamic_cast<QgsRasterLayer*>( QgsMSLayerCache::instance()->searchLayer( uri, layerName ) );
    }
    if ( !rl )
    {
      QgsMSDebugMsg( "hostedrds layer not in cache, so create and insert it" );
      rl = new QgsRasterLayer( uri, layerNameFromUri( uri ) );
      if ( allowCaching )
      {
        QgsMSLayerCache::instance()->insertLayer( uri, layerName, rl );
      }
      else
      {
        layersToRemove.push_back( rl );
      }
    }

    clearRasterSymbology( rl );

    //projection
    if ( rl )
    {
      QString epsg = elem.attribute( "epsg" );
      if ( !epsg.isEmpty() )
      {
        bool conversionOk;
        int epsgnr = epsg.toInt( &conversionOk );
        if ( conversionOk )
        {
          //set spatial ref sys
          QgsCoordinateReferenceSystem srs;
          srs.createFromOgcWmsCrs( QString( "EPSG:%1" ).arg( epsgnr ) );
          rl->setCrs( srs );
        }
      }
    }

    return rl;
  }
}