polygon information has no geo reference.

[duncan]

We use a list of UTM coordinates to pass polygon infomation around. The geo-reference information for these points is not kept/associated with the list. Because of this the zone of the points is not known. This can cause problems. eg when trying to convert the info to lats and longs.

To enhance ANUGA polygon info should be associated with geo reference info.

Implimentation - Use a geospactial object to hold polygon info.

[ole]

Yes we can create a class polygon with

• A geospatial data object to hold its vertices
• An optional name (as in a filename containing the polygon)
• An optional value that can me used for resolution of a mesh region

Instances of this class can then be used with a slightly upgraded mesh_interface.