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[mkgmap-dev] Please help with news about new DEM options

From Gerd Petermann gpetermann_muenchen at hotmail.com on Sat Feb 3 06:33:16 GMT 2018

Hi Carlos,

thanks again. Seems I need new glasses when I look at all those typos :O

I like the introducing chapter about DEM, but I don't fully agree reg. dem-dists:
"Reasonable values for the highest resolution are somewhere between
1648 and 5520 for 1'' hgt input files (3312 is often used), and
9942 for 3'' hgt input files."

Since 9942 is close to the resolution of the 3'' hgt I think 5520 is also suitable for
a 3'' file.

Maybe we should add that 1'' means ~ 3314 distance  and 3'' means ~ 9942
and that the 1st dist value should not be much smaller than 50% of that distance?


Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <cdavilam at orangecorreo.es>
Gesendet: Freitag, 2. Februar 2018 22:32
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] Please help with news about new DEM options

El 30/01/18 a las 09:41, Gerd Petermann escribió:
> Hi all,
> with r4093 I've merged the dem-tdb branch into trunk. I think it would be good to mention this in the
> "Latest news" on [1] , maybe with one or two screen shots, but I have no idea how to write this "from a users view".
> Do we need a how-to that describes the sources for hgt files and maybe more about the new options?
> It would be great if somebody could help with that.
> Gerd
> [1] http://www.mkgmap.org.uk/
Attached patch is not exactly what you asked for, but I hope it adds
some useful information about DEM.

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