[at-l] Measuring Wheels

[Walt Daniels]

Yes I have wheeled over 600 miles of trails in the last 2-3 years. (Also
GPSed them at the same time).
We use a Rolatape model 623 wheel. GPS and wheel do not measure the same
thing. On a paved bike path they agree pretty well, on rocky, twisty trails
the GPS is typically 10% low. The wheel measurement corresponds better to
hiking effort. Using a map measurer typically gets you numbers that are at
least 20% low. It is all about the distances you are averaging over with the
various devices. If you used a map measurer with its 1/8 inch wheel on a
trail you would be going up and over every grain of sand and get a huge
number of miles. 

-----Original Message-----
From: at-l-bounces at backcountry.net [mailto:at-l-bounces at backcountry.net] On
Behalf Of Jim Lynch
Sent: Tuesday, February 13, 2007 9:32 AM
To: at-l at mailman.backcountry.net
Subject: [at-l] Measuring Wheels

Has anyone used a measuring wheel to measure distances on trails?  Any
recommendations?  thnx!



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