From:
"patrick warnshuis" <patw@teleport.com>
Sent: 4/11/2002 10:08:00 AM
To:
gpsstash@yahoogroups.com
Cc:
Bcc:
Subject:

Re: [gpsstash] A New Approach to Maps


Do you have an URL for your company yet, Rick?
....patrick
----- Original Message -----
From: "rcblust"
To:
Sent: Monday, April 08, 2002 5:26 AM
Subject: [gpsstash] A New Approach to Maps


I am new to geocaching forums, and look forward to exchanging ideas.

For geocaching, I use the same combination of map/compass/GPS
techniques I've long used for backpacking and other back-country
travel and navigation. (I also train law enforcement, search &
rescue, firefighters, and outdoor recreationists generally in land
navigation.)

Instead of the standard large-sheet 7½ - minute topographic
quadrangles, though, I use MapTech Terrain Navigator to produce what
I call "MiniTopos," which are the same quadrangles reduced in size to
8½" x 11" at a military scale of 1-50,000 instead of the standard 1-
24,000. I print these out on either water-resistant paper or water-
proof synthetic sheets and grid them for UTM. Thus no romer scale or
other device is necessary to plot a GPS coordinate on the map; you
can make your plot with your fingertip or even just a glance. Scaled
down, the maps are much smaller and easier to deal with then the
original, large-sheet topos - though they have identical detail - and
they're much more durable in bad weather. An added plus is that the
good, sharp lines provided by the UTM grid make for excellent compass
triangulation plotting.

In a compass I favor a British Francis Barker prismatic (also called
an M73 or M88), Brunton Eclipse 8099, or Brunton/Silva Model 54. All
three offer outstanding accuracy and precision not only in plotting
map triangulations, but in plotting courses of travel (`lines of
march,' as the Brits say), as well. In addition, due to their tritium
lamps, the British Prismatics are 100% functional under even the
darkest conditions.

A basic or model Magellan or Garmin has always provided anything I
need in the way of a GPS.

Far and away, regardless of conditions, I've had the best results in
obtaining a bearing to the cache - or whatever the navigational
target is - with the GPS, then following that bearing to the `target'
with a good compass, with map consultation part of the process from
beginning to end.

With a good compass and attention to detail, it's not difficult to
get good old-fashioned compass triangulation accuracy in map plotting
down to one tenth of one percent of the map scale

I'm starting up a new company called TopoSystems. From our website,
we'll be offering MiniTopos, compasses, GPSs, a variety of other
equipment related to land navigation, and training.

Good geocaching!




The gpsstash page
http://www.geocaching.com
The GPS Stash Hunt page.
http://www.triax.com/~yngwie/gps.html

GeoCache HQ
http://www.braveheart.com.au
GPS Stash Hunt FAQ :
http://www.triax.com/~yngwie/stashfaq.txt
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