Can't compare web to GPS, but I've found over the years that both
calculate more climbing than is shown by an altimeter watch or bike
computer. The altimeter typically shows about 30% less altitude gain,
probably because the mapped versions add up every little up while most
altimeters ignore small gains.
-- Eric Norris
www.campyonly.com
www.wheelsnorth.com
On Feb 15, 2010, at 12:59 PM, doug peterson <dougpn...@cox.net> wrote:
In mapping out routes, I've noticed big differences in both distance
and elevation gain between GPS and plotting the same route on web
based mapping services. Distances can be off by 5%-10% and elevation
by double. The web based systems are always higher than GPS. Has
anyone else encountered this? It's entirely possible I'm doing
something wrong on the web based systems.
dougP
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