TestViewer::show( aPrs, AIS_Shaded, 4, true, "LandCoverMap_PrsByTypes" );
// select one of faces (first)
TestViewer::select( 200, 300 );
TestViewer::show( aPrs, AIS_Shaded, 4, true, "LandCoverMap_PrsByTypes" );
// select one of faces (first)
TestViewer::select( 200, 300 );