Nobody guarentees your GPS to be accurate to within 30 feet and neither does Google maps. My GPS usually claims around 10-12 feet accuracy provided it can see around 10 satellites. Leave your GPS on laying in your yard for a couple of hours plotting it's course and see how far it wanders.
On 25-Jul-10 22:55, Lee Ernstrom wrote:
Hi Guys,
I have been playing around with my Garman NUVI GPS and comparing the readings to Google Maps. This is something you call try at home. My Garman says that the base of my HF tower is at 41.07430 N 112.03774 W. When I punch in those coordinates in to Google Maps in the satelite view mode the arrow points to a location about 30 feet away near the middle of the lawn east of my driveway. When I play around with the coordinates a little through interpolation and punch them in to Google Maps several times I arrive at what appears to be the true coordinates of the base of my HF tower at 41.074329 N 112.037770 W. I suppose that is the significant difference that sixth decimal place makes. Check both of these coordinates on Google Maps to see what I mean. Any comments?
WA7HQD Lee Ernstrom Syracuse, Utah DN31xb _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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