- added Town area type for future use

- moved Town below Urban in priority list
- give freeways, roads, and railroads priority over lakes of various
  sorts

src/Lib/Polygon/names.cxx

@@ -79,6 +79,7 @@ inline static void init ()
   set_area("Canal", CanalArea);
   set_area("Glacier", GlacierArea);
   set_area("Urban", UrbanArea);
+  set_area("Town", TownArea);
   set_area("BuiltUpCover", BuiltUpCover);
   set_area("DryCropPastureCover", DryCropPastureCover);
   set_area("IrrCropPastureCover", IrrCropPastureCover);

src/Lib/Polygon/names.hxx

@@ -38,20 +38,21 @@ SG_USING_STD(string);
 enum AreaType {
     SomeSortOfArea = 0,
     HoleArea,			// Leave area completely empty
+    FreewayArea,
+    RoadArea,
+    RailroadArea,
     PondArea,
     LakeArea,
     DryLakeArea,
     IntLakeArea,
     ReservoirArea,
     IntReservoirArea,
-    FreewayArea,
-    RoadArea,
-    RailroadArea,
     StreamArea,
     CanalArea,
     GlacierArea,
     OceanArea,
     UrbanArea,
+    TownArea,
 
     // USGS Land Covers
     // These are low-priority, since known polygons should always win.