evan9381 Posted July 15, 2012 Report Share Posted July 15, 2012 are there some points around columbus that have accurate known elevation points? i got a new GPS and want to see how accurate it is, and try to calibrate it. My buddy and I did a ride yesterday, exact same ride, and his said we climbed about 2300' of elevation, and mine showed 2800'. Both are Garmin devices (his is a garmin 200, mine garmin 500), so i found it a bit odd that it was off by that much. Quote Link to comment Share on other sites More sharing options...
Steve R. Posted July 15, 2012 Report Share Posted July 15, 2012 are there some points around columbus that have accurate known elevation points? i got a new GPS and want to see how accurate it is, and try to calibrate it. My buddy and I did a ride yesterday, exact same ride, and his said we climbed about 2300' of elevation, and mine showed 2800'. Both are Garmin devices (his is a garmin 200, mine garmin 500), so i found it a bit odd that it was off by that much. Well, unless you are in the mountains of West Virginia, You didn't climb to that height. I am guessing that its total for all the hills you have travelled up. If I can recall correctly most of central Ohio is around 900 feet above sea level. Quote Link to comment Share on other sites More sharing options...
evan9381 Posted July 15, 2012 Author Report Share Posted July 15, 2012 i know what columbus is "approximately". but FWIW, we we're riding down around lancaster area, so its probably pretty close to that total, as to what we did ride. it was over a 62 mile stretch, so as a total, thats not unreasonable at all...im not talking about max elevation, but total vertical climbing. Quote Link to comment Share on other sites More sharing options...
TTQ B4U Posted July 15, 2012 Report Share Posted July 15, 2012 OSU Airport has a marker. 906ft. Quote Link to comment Share on other sites More sharing options...
Steve R. Posted July 15, 2012 Report Share Posted July 15, 2012 Ok, well then it comes down to the possibility of signal reception, calibration and as to whether they were reset before the trip. Was not saying it was unreasonable, I'm really just looking at the fact that over that distance, any number of things can cause different readings on separate gps devices. Quote Link to comment Share on other sites More sharing options...
evan9381 Posted July 15, 2012 Author Report Share Posted July 15, 2012 OSU Airport has a marker. 906ft. is it at a point the public can get to the marker? and is that over by UA area im assuming? Quote Link to comment Share on other sites More sharing options...
evil8 Posted July 15, 2012 Report Share Posted July 15, 2012 Good info, when Columbus is under water I can still strace for a while. Quote Link to comment Share on other sites More sharing options...
TTQ B4U Posted July 15, 2012 Report Share Posted July 15, 2012 is it at a point the public can get to the marker? and is that over by UA area im assuming? Not sure. Perhaps call them. I only remember it from when I had a visit there as a guest one time and an instructor told us about it and how it's an "official marker" of elevation. Quote Link to comment Share on other sites More sharing options...
evan9381 Posted July 15, 2012 Author Report Share Posted July 15, 2012 cool. i'll check it out. if anyone has any others, i'd like to find a few at different elevations to compare. Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted July 15, 2012 Report Share Posted July 15, 2012 NTR has a marker as well. Quote Link to comment Share on other sites More sharing options...
TTQ B4U Posted July 15, 2012 Report Share Posted July 15, 2012 NTR has a marker as well. that makes cents too. Quote Link to comment Share on other sites More sharing options...
buelliganx1 Posted July 15, 2012 Report Share Posted July 15, 2012 Rickenbacker airport is 749 feet if I remember correctly. Every airport has its elevation listed all you have to do is use google for the numbers. There are 5 airports in columbus and several more close by that should give you a good idea of how accurate your gps is. Quote Link to comment Share on other sites More sharing options...
Otis Nice Posted July 15, 2012 Report Share Posted July 15, 2012 Rickenbacker airport is 749 feet if I remember correctly. Every airport has its elevation listed all you have to do is use google for the numbers. There are 5 airports in columbus and several more close by that should give you a good idea of how accurate your gps is. Read this, googled, found this. Quote Link to comment Share on other sites More sharing options...
Tractor Posted July 15, 2012 Report Share Posted July 15, 2012 USGS Topographical maps have elevation points of just about all rises/summits (if in hills) marked on them. Remember each time your GPS takes a reading it is within specs to be 1-2 ft off +/- your correct elevation so its not at all impossible that between two units you were off several hundred feet at the end of your trip. At least this is how civilian GPS units worked a few years ago. Now I use an android device for mapping and don't really know their accuracy. Quote Link to comment Share on other sites More sharing options...
Avenger1647545502 Posted July 16, 2012 Report Share Posted July 16, 2012 Franklin County Engineers office on 33 near the Post Office has a USGS datum right out front. There are a couple others in accessible places around the county, I think. Those are as accurate as it's possible to get. Quote Link to comment Share on other sites More sharing options...
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