Thanks for the info!!
El 28/01/18 a las 14:20, Peter Danninger escribió:
I've downloaded and testet.
look at attachment.
In short-form:
-----------------------------------------
really good, comparable with the
USGS-NASA .hgt-files.
N74E018, N74E019:
Bjornoya (Bäreninsel) missing,
only "0", files deactivated
N52E006, N51E005, N51E008, N50E005:
some void's, easily correctable
comparisation with USGS-NASA files
only in the Alps-area and
only regarding min/max-values:
majority are nearly identical,
some differ by 20-30m
regarding the min/max-values,
but which are "better" ???
regards Peter
Am 27.01.2018 um 17:50 schrieb Carlos Dávila:
Thanks for sharing your results. Have you tested data from
http://opendem.info/opendemeu_download_4326.html ?
El 27/01/18 a las 15:56, Peter Danninger escribió:
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.
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