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Index of Subjects Hi Peter and All Its is interested to note that once when in Fundy Park, NB I saw a sign that said "Elevation 394M". I got out my GPS and its said elevation 394 m also. I wonder where the folks who put up the sign got the elevation? Have a good winter - Hope you see a butterfly soon! Paul --- Peter Payzant <pce@accesswave.ca> wrote: > Hi, Jamie- > > Elevation measurements from GPS are significantly > less accurate than > lat-long measurements. This is due in part to the > geometry of the situation, > and in part due to the fact that the GPS system > calculates your distance > from the centre of a sphere, and then applies a > model of the earth's surface > to correct for the earth's radius at your location. > There are other sources > of error as well. > > There's lots about this on the net of course. Until > you understand the > nature of the errors it's probably not a good idea > to put too much faith in > what the GPS receiver tells you for elevation. > > If you wanted to get a good result, you could rent a > surveyor's level and > work your way up to your house from the nearest > known accurate elevation. > > Peter Payzant > > ____________________________________________________________________________________ Now that's room service! Choose from over 150,000 hotels in 45,000 destinations on Yahoo! Travel to find your fit. http://farechase.yahoo.com/promo-generic-14795097
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