3 ms·
For what it's worth, most GPS chips report elevation (however accurate or inaccurate that may be). It could be as "simple" as using the elevation data in the ex
by microcolonel 10y ago
For what it's worth, most GPS chips report elevation (however accurate or inaccurate that may be). It could be as "simple" as using the elevation data in the existing traces, assuming they didn't strip that or fail to save it.
Then again, for common elevation data, there are loads of other good sources which can be used in conjunction with OSM, not sure about licensing though.
- rkda 10y agoThe problem with elevations from GPS chips are that they are ellipsoidal heights, that is the height from the surface of the ellipsoid used to model the earth. This can be very far from the elevation referred from mean sea level. I think SRTM is still the best way to get elevation data as mentioned by other commenters.
- microcolonel 10y agoThat explains a lot! After looking at some traces I started to suspect the same. I guess I should've RTFM.