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Colby, Kansas | From one pass of your 500, it could be questionable. But research done at K-State in the early 2000's showed that multiple layers of WAAS GPS data averaged together did almost as good of a top of showing topographic features as RTK. Although absolute errors in elevation were higher in the WAAS data, the relative differences were nearly as good as RTK.
So from one field operation pass, WAAS probably isn't going to give real good elevation data, but if you have 3 or 4 seasons of planting/harvest data you could average those elevations and have a nice layer to use. The absolute values may not be dead on, but the relative differences in a field will be captured.
This paper gives a detailed comparison of averaged multiple layers of WAAS data vs. RTK elevation data
http://biosystems.okstate.edu/Home/randalt/Publications/Developing%...
Lucas
Edited by LHaag 5/10/2011 17:42
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Can I make topo graphs with EZ Guide 500 and WAAS?
