Hi all. I'm analyzing some global-scale DEMs, like ETOPO1/2, SRTM30_PLUS, etc.
I'm getting the statistics for the whole dataset with r.univar, but today I noticed that the results differ if I use different projections. (GRASS 7.1) For example, ETOPO2: Using a latlong pseudo-projection (plate carré) min: -10791 max: 8440 mean: -1888.6480792 median: -2457 stddev: 2650.01922839 p25: -4273 p75: 216 And using equal-area cylindrical: min: -10791 max: 8440 mean: -2379.78247747 median: -3291 stddev: 2507.89668617 p25: -4541 p75: 94 Are these differences expected? I would think that they should be the same, regardless of projection (I'm thinking on the elevation values as an array of values). thanks Carlos -- Prof. Carlos Henrique Grohmann Institute of Energy and Environment - Univ. of São Paulo, Brazil - Digital Terrain Analysis | GIS | Remote Sensing - http://carlosgrohmann.com http://orcid.org/0000-0001-5073-5572 ________________ Can’t stop the signal.
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