Hi, About DEM: http://pinns.co.uk/osm/demlook.html http://pinns.co.uk/osm/dem.html
Not tested… Steph Le 24/10/2017 à 09:52, Gerd Petermann a écrit : > Hi Frank, > > okay, seems to be more work. Don't know if I am just getting old but I have > no idea where to start. > We know a few demo maps which contain DEM data. Now we also have your doc and > the demo program. > I am not familiar with c# and I don't have Microsoft Studio, but I think > there are free versions for this as well. > I used to maintain some c/c++ programs so I guess I should be able to dig > into this again, but it will take a while. > My only advantage is that I am german and therefore able to read your doc and > the comments in the source ;-) > > I seem to remember that someone described how to extract DEM data from a > gmapsupp and merge it into his own map, > that's why I assumed that it should be possible to calculdate this only once > in a while. > I'd really prefer that solution, but this is a different problem. > > I hope I get into this during the next weeks, but as of now I think it might > take some months before we have this in mkgmap :-( > > Gerd > ________________________________________ > Von: mkgmap-dev <[email protected]> im Auftrag von Frank > Stinner <[email protected]> > Gesendet: Sonntag, 22. Oktober 2017 18:56:04 > An: [email protected] > Betreff: Re: [mkgmap-dev] a new DEM-File Option > > Hi, > > at first: > yes i mean the DEM-flag in TDB-file like Andrzej Popowski wrote. > > at second: > unfortunally it seems, that the corner left-top for TRE-file and > DEM-file should be the same. The height-data organized in subtiles with > 64x64 points. The most right sub-tile is a problem, but my workaround > is, to use a normal tile with 64 points width. That's why, the DEM is at > most a little bit widend then the TRE. > The data in a sub-tile are organized as a bitstream. That's why, we can > not split a subtile in parts. > I belive, we must "compile" a DEM for anything TRE new. > > at third: > Yes, the best way is, to build in the algorithm in mkgmap. But i'm not > familiar with java. It would be useful, if anybody translate my > description (my german is a little bit better than my english :). > For easy test: > builddemfile --dem=12345678.dem --hgtpath=path2zipped_hgt_files > --tre=12345678.tre --dlon=0.00027761 > I build the program with the MS-Visual-Studio 2015. > > at fourthly: > I build also a DEM-file for the overview-map, but with --dlon=0.005. > > at fifthly: > Probably can a DEM-file several Zoomlevel. But for Mapsourec/Basecamp it > is not necessary. It seems, we need that for a GPS-Device. My Oregon > show DEM only for Zoom <= 800m. > > > Frank _______________________________________________ mkgmap-dev mailing list [email protected] http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
