"Top of Europe", wrong elevations

Sun, 30 Jul 2017 16:02:23 +0000

Hello,

We visited 3 caches at the 'Top of Europe' in Switzerland. The elevations listed are too low. We read the FAQ considering elevation calculation and understand the problems regarding elevations. Still, there are differences between the srtm3 heights shown in geonames and the heights listed in Project GC.

GC39FJD http://api.geonames.org/srtm3?lat=46.54745&lng=7.98512&username=demo, result is 3466, listed in project GC is 3407
GC2QE08 http://api.geonames.org/srtm3?lat=46.54625&lng=7.98243&username=demo, result is 3396, listed in project GC is 3357
GC3MQT3 http://api.geonames.org/srtm3?lat=46.54753&lng=7.98165&username=demo, result is 3441, listed in project GC is 3414

The differences are not very large, but we still wonder what causes the differences. Are the SRTM3 data updated so often?

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