I could not believe the speed they responded to my query. I'll pass along to you. R Moore Rosemary - We're working on getting a key to all those map symbols up on our Web site. In the meantime, the USGS has one on their mapping site - you can find by starting at http://mapping.usgs.gov and looking around. Purple areas are "disturbed" areas that have been modified in some way since the map was printed - but the map hasn't been updated to reflect those changes in detail. - Ed Ed McNierney [email protected] http://www.topozone.com