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Fix the SRTM tiles database

The srtm database seems buggy. We encounter an issue when we process the 30SXG S2 tile. According your external tool, the requested srtm tiles are N37W002, N37W001 and N36W002. So we provide this as input in the srtm directory. However S1 tiling returns an error:

[N36W002.hgt, N37W002.hgt, N37W001.hgt, N36W001.hgt]
CRITICAL - /data/srtm/N36W001.hgt is missing!

The N36W001 tile didn't exist (on datalake, on usgs earthexplorer or on other know website). As you see below there is difference between your file (found here) and the file we used.

N36W001_issue

When I compare my file to your file, I detect other issues :

  • north latitudes (N60*.hgt files didn't exist) :

N60_issue

  • N04W091 tile didn't exist:

N04W091_issue

-Several other tiles are wrong