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[mkgmap-dev] r4006: 1st alpha version to write DEM data

From Gerd Petermann gpetermann_muenchen at hotmail.com on Wed Dec 20 16:36:30 GMT 2017

Hi Henning,

please try with r4008 which implements that and also interpolation of hgt values. There seems to be a major bug somewhere in the encoder, sometimes MapSource displays only
parts of the map and relief looks wrong. I did not yet find out where exactly the problem is. I tried to compare the results from mkgmp with those from BuildDEMFile.
It seems that mkgmap sometimes calculates different positions because of rounding differences. I tried to do most calculations with integers while
BuildDEMFile uses doubles. Will try again tomorrow.


Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Henning Scholland <osm at hscholland.de>
Gesendet: Mittwoch, 20. Dezember 2017 17:06:25
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] r4006: 1st alpha version to write DEM data

Hi Gerd,
it's a great news. I wanted to try it on my map of China. But
unfortunately failed because of missing files in the sea area between
Korea and Japan. Maybe it's a good 1st approach to interpret a missing
file as an area with 0 elevation.

Anyway, thanks for all the research work on DEM!!!

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