A semantic type for a Geography class. Used to describe geometries operating on a spherical base (ra
ther than Geometry which operates on a planar basis). This is extremely similar to a Geometry – but they're quite different types and not in a hierarchy.
See the Open Geospatial Consortium Simple Features Access specification for details on the Well-Known-Binary format http://www.opengeospatial.org/standards/sfa
WKB has to be forwards-compatible to the spec, so strict OGC WKB, and EWKB (PostGIS) are both ok. @author Robert Coup