[GeoStL] Re: Flooding in northeast MO
- From: "Mike Griffin" <griff@xxxxxxxxxxxx>
- To: <geocaching@xxxxxxxxxxxxx>
- Date: Tue, 29 Jul 2008 18:40:59 -0500
Thanks Jim for the info. The person I taught with out at Philmont makes his own
maps and owns a company called Timely Topos. He had a laptop device that was
around 20K and had a GPS built in. He could strap the laptop around his waist
and neck and walk around clicking things as he went to make a custom topo. It
was very cool!
I will check out the site. I use the topos you made for Mark Twain all the time
in ExpertGPS.
Mike
----- Original Message -----
From: Jim Bensman
To: geocaching@xxxxxxxxxxxxx
Sent: Tuesday, July 29, 2008 6:26 PM
Subject: [GeoStL] Re: Flooding in northeast MO
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!
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