- fix airport area texturing

- fix ocean texturing for tiles with a coastline

src/Airports/GenAirports850/airport.cxx

@@ -1225,7 +1225,10 @@ void Airport::BuildBtg(const std::string& root, const string_list& elev_src )
 
     std::string holepath = root + "/AirportArea";
     tgChopper chopper( holepath );
+
     divided_base.SetPreserve3D( true );
+    apt_clearing.SetPreserve3D( false );
+    apt_clearing.SetTexMethod( TG_TEX_BY_GEODE );
 
     chopper.Add( divided_base, "Hole" );
     chopper.Add( apt_clearing, "Airport" );

src/BuildTiles/Main/tgconstruct_clip.cxx

@@ -232,6 +232,7 @@ bool TGConstruct::ClipLandclassPolys( void ) {
 
         if ( remains.Contours() > 0 ) {
             remains.SetMaterial( get_area_name(get_sliver_target_area_type()) );
+            remains.SetTexMethod( TG_TEX_BY_GEODE, bucket.get_center_lat() );
             polys_clipped.add_poly( (int)get_sliver_target_area_type(), remains );
         }
     }

src/BuildTiles/Main/tgconstruct_elevation.cxx

@@ -81,8 +81,6 @@ void TGConstruct::CalcElevations( void )
         }
     }
 
-    return;
-    
     nodes.get_geod_nodes(raw_nodes);
 
     // now flatten some stuff