What could any of us mere mapping mortals add to what you already have? I took a Cartography class as a part of one of many majors. Geology was one of them where we studied topos continously.I worked for a large grading company for years where my job was to figure the dirt that had to be moved on housing tracts mostly in the hills of Thousand Oaks and Semi Valley.I worked all day with the engineered grades superimposed over the topos. I can read a topo like reading a newspaper.When I look at a topo it literaly looks like 3D for me.