[mkgmap-dev] mkgmap r4022 ready

Thu Dec 28 10:21:45 GMT 2017

Hi Gerd,

another solution from 'nice looking' point of view except not creating
DEM would be to also create sea polygons for the whole rectangle. But I
guess it's pretty hard as it needs data tiles, am I right? For users of
course it would be better to define an poly-file, where DEM should be
created, as these poly-files already exists.

Btw.: http://www.hscholland.de/OSM/HGT.7z you can find the 'broken'
hgt-files where I got the problem Gerd pointed out. Viewfinder-data are
fine so far.

Can mkgmap read already compressed hgt-files? I remember previously
mkgmap was able to read bzip2 or gz-compressed osm-files. So there are
maybe already classes for reading compressed data in mkgmap.

Finally I want to thanks all of you for the great work! I even don't
know how long I was waiting for this feature!!!

Henning

On 28.12.2017 11:01, Gerd Petermann wrote:
> Hi all,
>
> see the log message http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4022 
> for details about the changes.
>
> I've also experimented with code to read a *.poly file and use that to define an area for which mkgmap should 
> not calculate DEM data but was not happy with the results so far. Maybe I'll try again.
>
> Henning has pointed me to an error:
> It seems that mkgmap (and probably also BuildDEMFile) somtimes create invalid DEM data 
> for areas where the hgt files contain large holes, esp. when resolution is low (high dem-dist value).
> See e.g. http://files.mkgmap.org.uk/download/377/holes.jpg
> I try to find out more now.
>
>
> Gerd
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