How do I use the Cortona navtive implementation?
The Cortona VRML browser from ParallelGraphics has implemented the GeoVRML nodes natively. However, in order to use these native nodes, you must currently use PG’s versions of the GeoVRML PROTOs, which may not work in other browsers. These PROTOs can be found at http://www.geovrml.org/1.0/protos-cortona/.