You download the elevation and hydrology data from USGS servers. The hydrology is in a format you can use directly. The elevation data (which is 3 times more accurate than what is on the USGS 24K maps) has to be run through a freeware program to turn the geotiff into a file with contour lines. Then there is another freeware program you compile the map in. There is a steep learning curb, but once you figure it out, it is pretty easy to do. It probably takes 15 to 20 minutes to make a map (that does not include the time the computer is compiling and converting). Here is a description of the process I use: http://home.cinci.rr.com/creek/garmin.htm Jim Bensman "Nature Bats Last" Go Obama! _____ From: geocaching-bounce@xxxxxxxxxxxxx [mailto:geocaching-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Griffin Sent: Tuesday, July 29, 2008 6:11 PM To: geocaching@xxxxxxxxxxxxx Subject: [GeoStL] Re: Flooding in northeast MO Did you make those maps? That is impressive! What software do you use to make topo maps? I thought the maps you had were store bought and converted. I had no idea you make them. Mike ----- Original Message ----- From: Jim Bensman <mailto:junkmailno@xxxxxxxxxxx> To: geocaching@xxxxxxxxxxxxx Sent: Tuesday, July 29, 2008 5:02 PM Subject: [GeoStL] Re: Flooding in northeast MO I looked at them on the topo map I made. It looks like the vast majority are OK, but some are under water. For example, fiji shows it is at 430 feet. Long Island is at 420. Aruba is at 410. Ireland, Mallorca, Ibiza Malta could be in trouble Jim Bensman "Nature Bats Last" Go Obama! _____ From: geocaching-bounce@xxxxxxxxxxxxx [mailto:geocaching-bounce@xxxxxxxxxxxxx] On Behalf Of Michael Rogers Sent: Tuesday, July 29, 2008 4:43 PM To: geocaching@xxxxxxxxxxxxx Subject: [GeoStL] Re: Flooding in northeast MO Well, if one had time, one could get the map of the lake from the Corps site and get a map of the MOGA caches and compare them to see if any are in danger. ----- Original Message ---- From: "lake_wannabees@xxxxxxxxx" <lake_wannabees@xxxxxxxxx> To: geocaching@xxxxxxxxxxxxx Sent: Tuesday, July 29, 2008 4:28:50 PM Subject: [GeoStL] Re: Flooding in northeast MO I wonder if the water is putting any of the MOGA caches in danger. Sent via BlackBerry by AT&T _____ From: Michael Rogers <mrogers07@xxxxxxxxxxxxx> Date: Tue, 29 Jul 2008 14:24:27 -0700 (PDT) To: <geocaching@xxxxxxxxxxxxx> Subject: [GeoStL] Re: Flooding in northeast MO I just checked the Corps of Engineers website...as of 3 p.m. Mark Twain Lake was at 640.09 feet. I have NEVER seen it get this high before...mind you, normal pool is 606 feet. Amazing. I sure hope everything works out and they can tame this beast. -Michael ----- Original Message ---- From: Libby Morehead <gmalibby@xxxxxxxxxx> To: geocaching@xxxxxxxxxxxxx Sent: Tuesday, July 29, 2008 3:39:41 PM Subject: [GeoStL] Flooding in northeast MO Hey Cachers! It is water, water everywhere. Definitely not a good time to cache in Monroe, northern Boone or Ralls County. The Corps is fighting to save Cannon Dam at this point and there is more rain to the north and more predicted for later tonight. Many of the caches Jo and I hid are surely under water since even the roads are under water and many closings are in effect. I felt sorry for those of you with caches along the Meremec, etc., but never imagined we would have this much water and be in the same situation. We will get them cleaned up and back as soon as the water goes down and we can assess which are in need of TLC. In the meantime, forget about this neck of the woods. (Actually, in many directions you can't even get here.) To drier days.... Libby