[mkgmap-dev] mkgmap r4022 ready

Thu Dec 28 12:48:37 GMT 2017

Hi Gerd,
So far I understand you have implemented already cutting the DEM to the map area and just looking for another way to have some larger area for DEM data? I don't see a use case for that. Probably the reason why I first didn't realised the beginning of your svn comment.
Henning 

On 28 Dec 2017, 11:01, at 11:01, Gerd Petermann <GPetermann_muenchen at hotmail.com> 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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