Hi Gerd should 3312 logically be 3314 (2^32/(360*3600)) ? Not that it matters much. r Nick On 11/01/2018 13:48, Gerd Petermann wrote:
Hi Andreas,
you are right, thanks for the hint. I took those from the transalpin demo map, but the last two levels are empty. So, r4045 now says Example which should work with levels="0:24, 1:22, 2:20, 3:18": --dem-dists=3312,13248,26512,53024
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von andreas.schmidt.hetschbach@t-online.de <andreas.schmidt.hetschbach@t-online.de> Gesendet: Donnerstag, 11. Januar 2018 14:38:24 An: Development list for mkgmap Betreff: [mkgmap-dev] option --show-profiles and DEM
Hi Gerd,
I got a bit confused when I read the doc/example
--dem-dists=number[,number] If given, the option specifies the resolution(s) or zoom level for the DEM data. If not given, mkgmap tries to determine a reasonable value based on the resolution found in the *.hgt files. For PC programs like MapSource or Basecamp you only need one zoom level, for gps devies you need one for each resolution given with the --levels option. The actual values are given as distance between two DEM points. Higher disances mean lower resolution and thus fewer bytes in the map. Reasonable values for the highest resolution are somewhere between 1648 and 5520, 3312 is often used. Example which should work with levels="0:24, 1:22, 2:20, 3:18, 4:16": --dem-dists=3312,13248,26512,53024 This was found in a Garmin Demo map for transalpin data created 2009.
There are only 4 values for –dem-dist ,although there are 5 „Levels“. This seems to be in contrast to „…for gps devies you need one for each resolution given with the --levels Option ?
Regards
Andreas
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Von: Henning Scholland<mailto:osm@hscholland.de> Gesendet: Donnerstag, 11. Januar 2018 12:55 An: mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk> Betreff: Re: [mkgmap-dev] option --show-profiles and DEM
Hi all,
I don't see a reason to have this option at all. It should be set automatically to 1 if either contour data or DEM is written. If this data is in the map, you always want to have it and if those are not in the map, you don't need it. Or am I wrong?
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