Hi Henning,
yes, we have specialized tools for this work, they make a good job and we
should use this tools.
A little interesting idea is: If we can use additional use tif's a "container" for dem data, we can safe space on the hd. My little test with the
copernicus files show: 5.2GB for zipped hgt's and only 3,54GB for the tif's with lzw compression (round about 68%).
"container" means: only use 16-bit grayscale values, no metadata, no coordinate reference
system or whatever. A "on-the-fly-conversion" is to expensive.
You ask: Are the copernicus-files so much better compared to the viewfinder-hgt
files?
How we can decide this? I believe, there is no way. I have not found any information about the +- interval for SRTM or the viewfinder-data. I only
know, that the copernicus-files have the 25m resolution from tanger up to the north cape in norway.
Frank
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