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elevation is out on my oregon 600
Posted: 03 December 13 11:44 pm
by madivad
I am not very happy with the elevation as detailed by my Garmin Oregon 600 device. I have thought it out almost sine day one. But today caching some trig points at sea level and seeing the garmin report 30MASL, well, 30M is a LOT!
Is that acceptable? I'm thinking not.
Should elevation be "calibrated"?
Re: elevation is out on my oregon 600
Posted: 04 December 13 7:06 am
by Dik:
The GPS accuracy for elevation is typically 10x the horizontal error, so 30m is not unacceptable.
If your GPS has a barometric altimeter then you can calibrate it, but that depends on weather conditions and needs recalibrating regularly. I have a known point at home and recalibrating to that before going out. Calibrate at the known trigg elevation then check the elevation of a fixed point at home and repeat several times over several days.
You should also check the PDOP prediction to ensure the optimum satellite coverage prior to measurement
http://www.trimble.com/GNSSPlanningOnline/#/Settings