Hi Nick, I also wondered why Garmin prefers 3312 while 3314 looks the exacter value. Found no explanation so far.
Gerd ________________________________________ Von: mkgmap-dev <[email protected]> im Auftrag von osm@pinns <[email protected]> Gesendet: Donnerstag, 11. Januar 2018 15:04:32 An: [email protected] Betreff: Re: [mkgmap-dev] option --show-profiles and DEM 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 <[email protected]> im Auftrag von > [email protected] > <[email protected]> > 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 > > Gesendet von Mail<https://go.microsoft.com/fwlink/?LinkId=550986> für Windows > 10 > > Von: Henning Scholland<mailto:[email protected]> > Gesendet: Donnerstag, 11. Januar 2018 12:55 > An: [email protected]<mailto:[email protected]> > 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? > > Henning > _______________________________________________ > mkgmap-dev mailing list > [email protected] > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev > _______________________________________________ > mkgmap-dev mailing list > [email protected] > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev _______________________________________________ mkgmap-dev mailing list [email protected] http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev _______________________________________________ mkgmap-dev mailing list [email protected] http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
