[mkgmap-dev] Deletion of unneeded hgt files

Sat Apr 3 14:06:38 BST 2021

Hi Carlos,

please double check:
I don't have files for N60E157, N72E057 and N77E083
I have a N64W180.hgt with a few non-zero values.

Results are in new patch.

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <carlos at alternativaslibres.org>
Gesendet: Samstag, 3. April 2021 13:27
An: mkgmap-dev at lists.mkgmap.org.uk
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 <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <carlos at alternativaslibres.org>
> 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.
>
> _______________________________________________
> mkgmap-dev mailing list
> mkgmap-dev at lists.mkgmap.org.uk
> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

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