No OSM data, only maritime admin boundary.
El 4/4/21 a las 11:26, Gerd Petermann escribió:
Hi Carlos,
reg. N64W180.hgt:
I've not recorded where I got my files from, but yes, it's a 3'' file and I got
most of them from viewfinderpanoramas.
I'll triple check if OSM contains any data for this area or did you do this
already?
Gerd
________________________________________
Von: mkgmap-dev <[email protected]> im Auftrag von Carlos Dávila
<[email protected]>
Gesendet: Sonntag, 4. April 2021 11:21
An: [email protected]
Betreff: Re: [mkgmap-dev] Deletion of unneeded hgt files
El 3/4/21 a las 15:06, Gerd Petermann escribió:
Hi Carlos,
please double check:
I don't have files for N60E157, N72E057 and N77E083
Correct
I have a N64W180.hgt with a few non-zero values.
According to Google satellite imagery, this tile is all sea. Where did
you get it from? I can only find 3 arcsec tile from viewfinderpanoramas
for this tile, no 1 arcsec in VFP, SRTM or ALOS.
Results are in new patch.
Gerd
________________________________________
Von: mkgmap-dev <[email protected]> im Auftrag von Carlos Dávila
<[email protected]>
Gesendet: Samstag, 3. April 2021 13:27
An: [email protected]
Betreff: Re: [mkgmap-dev] Deletion of unneeded hgt files
Regarding tiles covering Caspian Sea (N37E051 to N44E049), I thought
it's height would be 0, but if the real height is -29m then they should
not be removed from known-hgt.txt. But they are no longer available from
SRTM or ALOS.
The other tiles removed in my patch are in open sea areas, so their
height should be 0 and can be IMHO safely removed.
El 3/4/21 a las 10:04, Gerd Petermann escribió:
Hi Carlos,
not sure what to do with this. Seems your patch removes the files which are
listed here:
https://www.opentopodata.org/notes/invalid-srtm-zips/
My SRTM directory contains the listed files and they show a constant height of
-29m as stated in the linked page.
My understanding is that you don't have those files, but you should have. A
non-existing file is treated like a file with height 0.
Gerd
________________________________________
Von: mkgmap-dev <[email protected]> im Auftrag von Carlos Dávila
<[email protected]>
Gesendet: Samstag, 3. April 2021 09:45
An: Development list for mkgmap
Betreff: [mkgmap-dev] Deletion of unneeded hgt files
Attached patch deletes some hgt files which correspond to ocean areas
from known-hgt.txt file. They just lead to confusing warnings when
running mkgmap to generate a map with DEM.
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