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add geoid altitude correction #8

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ghost opened this issue Aug 17, 2015 · 1 comment

ghost commented Aug 17, 2015

the code from OsmAnd doing EGM96 correction could probably be adapted and should give around 1m or better accuracy in most places:
https://github.com/osmandapp/Osmand/blob/master/OsmAnd-java/src/net/osmand/GeoidAltitudeCorrection.java

The needed data - "WW15MGH.DAC" - and some background is here:
http://earth-info.nga.mil/GandG/wgs84/gravitymod/egm96/binary/binarygeoid.html

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emdete commented Sep 4, 2015

interesting hint, thank you!

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