[Cdt-l] GPS base maps

bcss at bresnan.net bcss at bresnan.net
Mon Apr 16 09:13:02 CDT 2012

That theory would be true if there were gps background maps available that
actually showed the track accurately enough to follow in snow.  When we
mapped the trail we had the most accurate track data available at the time
and it was, in great part, not good enough for that.  We actually did some
rather extensive testing of this with a Garmin Colorado equipped with built
in Mapsource Topo background maps.  Those maps are even less accurate than
the ones we used.      


There are comparisons of actual versus map here:
http://www.bearcreeksurvey.com/old_versus_new.htm   Scroll down to the
bottom two illustrations and have a look.  This is fairly typical for much
of the trail.  


I personally feel that gps receivers are used as a tool (like a compass) by
many, and as electronic entertainment by others.  No problem with either
mindset, but if you have accurate waypoint data and good maps then a bare
bones gps setup will do the job.  


Hikers should probably still carry a compass in case their gps conks out. 



best wishes,


Jerry Brown

 <mailto:bcss at bresnan.net> mailto:bcss at bresnan.net



From: cdt-l-bounces at backcountry.net [mailto:cdt-l-bounces at backcountry.net]
On Behalf Of Dylan Carlson
Sent: Sunday, April 15, 2012 12:05 PM
To: cdt-l at backcountry.net
Subject: [Cdt-l] GPS base maps


After numerous experiences following trails obscured by 6 feet of snow, I
have come to respect the mapping software in modern GPS.  On the CDT, I just
carried topo maps and compass, but I also had a late start and waited longer
for snow to melt.  


My point is, there are times when you literally cannot see the trail - even
when you're right on top of it.  If you're going to carry a GPS, batteries,
and accessories, you might as well carry one with some basic mapping
software to show you where the trail is.

Dylan Carlson

CDT 2009

PNT 2006


Date: Sun, 15 Apr 2012 08:24:34 -0600
From: <bcss at bresnan.net>
Subject: Re: [Cdt-l] gps with maps question

If you just intend to turn your gps on to use in  perplexing situations,
then you can probably do fine without any base maps at all.  You will still
be able to navigate to waypoints and stay on route.  I have not found having
tiny maps on a tiny screen (be it a phone or gps) to be particularly useful.
A paper map is much better, and you will definitely be carrying those.

best wishes,

Jerry Brown  (bearcreek)

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