[OSM-talk] What's good accuracy for a GPS unit?

Phil! Gold phil_g at pobox.com
Tue Apr 13 21:47:00 BST 2010


Hopefully this isn't too off-topic for the list.  If it is, sorry.

I use a Palm Pre for recording GPS traces.  Once it's warmed up, it
normally reports an accuracy of 3 meters, which seems to fit reasonably
with what I've seen when overlaying my traces on the Yahoo WMS tiles
(although sometimes traces where I was driving in the same place at
different times can diverge by 4 to 5 meters).

What I'm curious about is how well the Pre's accuracy compares to other
GPS units.  I've read that GPS units with WAAS (for I am in the US) can
get results with less than one meter of imprecision, but in a survey of
GPS unit accuracy online I only found reports of "3 meters or less".

What's the typical degree of accuracy you get with your GPS unit?

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