Erratic SRTM elevations

tkrajina / srtm.py

Geo elevation data parser for "The Shuttle Radar Topography Mission" data

Apache License 2.0

240 stars 57 forks source link

Erratic SRTM elevations #15

Closed hrpunio closed 7 years ago

hrpunio commented 8 years ago

I compare gpxelevations with gpsprune (http://activityworkshop.net/software/gpsprune/) and googleAPI (for a certain GPX track). Using RMSE (root mean square error) I have got 1,2 meter average difference for gpsprune versus googleAPI while almost 4 meters for gpselevations versus googleAPI/gpsprune (4 times more or 400%). Looking at plotted values (http://fabianserwis.homelinux.com/p/) I have discovered a few areas of suspiciously erratic elevations Any explanation?

tkrajina commented 7 years ago

Nope, I have no idea what could be wrong.

If somebody else have an explanation and is willing to fix it (in case there is a bug), I'm willing to merge it.