Another dated program also said to be for archaeology is "Landscape Explorer" By WooleySoft. It was the first I saw that could overlay USGS or Ordnance Surveys over a DTM, using the flatmap as the 3D generated surface. Humblesknowe Cottage Ramoyle, Dunblane, Perthshire Scotland FK15 0BA They became "Geomantics" and actually recreate landscapes from DTM and other dat creating a photorealistic scene of a landscape comparable to a photo complete with sky and hedgerows. An interesting program that may or not be in the realm of historic documentation, but it could be a tool for visualization on a plane for interpretation. _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.