Some results from my .hgt-tests: I wanted to find usable .hgt files for my web-application zu add height data to .gpx http://peter.myds.me/HDS/Tipps_Tricks/GPS/GPXclean/GPXclean.html ==> look at: "Spezialisten-Funktionen per Aufrufparameter" ==> sorry, only German ... ==> The results are in the attachment. In short form: ----------------------------------------------------- Viewfinderpanoramas Medium Europe 3sec: ==> lots of voids and too low height values. NASA_USGS 1sec: ==> no voids, but some too low height values. not too bad, but easily correctable by directly adjacent height values. BUT only up to N59 in the north. Viewfinderpanoramas Northern Europe 1/3 sec: ==> some voids in Island in the overlay row/col, but easily correctable by directly adjacent height values. To sum up: More then 3100 .hgt files without real problems. As far as available these are 1sec files. Only in the very north 3sec .hgt files. I'm happy with the NASA_USGS 1sec .hgt files :-) Peter http://www.danninger.eu Am 27.01.2018 um 15:06 schrieb Carlos Dávila:
El 27/01/18 a las 14:57, Carlos Dávila escribió:
I have no objective method to compare hgt sources (is there any?)
Well, a method I have already used is to get the number of voids in a hgt file using QGIS.
_______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev