[mkgmap-dev] Is dem-tdb branch ready for trunk ?From osm@pinns osm at pinns.co.uk on Sat Jan 27 09:49:55 GMT 2018
Hi The idea of a dem.zip sounds would have some major disadvantages 1) Data can only be 3arc or 1 arc not both 2) 1 arc data to me is more preferable but contains void data which have to be replaced with 3arc data Nick On 27/01/2018 09:40, Thomas Morgenstern wrote: > Maybee we can create a ready to use DEM-model, store it like the > bounds.zip and see.zip ? The user can download it and mkgmap reads the > DEM from downloaded #DEM.ZIP# ? > This method would be a graet advantage for users, who not so familiar > with the DEM . > Regards Thomas > -------------------------------------------------- > Von: "Gerd Petermann" <GPetermann_muenchen at hotmail.com> > Datum: Samstag, 27. Januar 2018 08:54 > An: <mkgmap-dev at lists.mkgmap.org.uk> > Betreff: [mkgmap-dev] Is dem-tdb branch ready for trunk ? > >> Hi all, >> >> I am not aware of any erros in r4091, so I think it is time to merge >> it into trunk. >> >> I see only one problem: HGT data changes rarely, so I'd prefer to do >> the costly DEM calculations >> only once and be able to store the results. >> I've already described how to do this here  but I'd prefer to have >> a container format that allows >> mkgmap to extract the Garmin DEM bitstream data for a given lat/lon >> pair from a file. >> Such a container could contain the DEM data for one or more dem-dist >> values. It could be empty first >> and grow each time you calculate DEM for a new area. In subsequent >> executions of mkgmap it would >> check if the container already contains the data for the wanted area. >> Advantage would be a faster tile compilation and less power >> consumption, disadvantage would be the >> additional disk space and higher complexity. >> >>  >> http://gis.19327.n8.nabble.com/Performance-with-zipped-hgt-files-tp5909756p5909801.html >> >> Gerd >> >> >> >> _______________________________________________ >> mkgmap-dev mailing list >> mkgmap-dev at lists.mkgmap.org.uk >> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev >> > _______________________________________________ > mkgmap-dev mailing list > mkgmap-dev at lists.mkgmap.org.uk > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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