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[mkgmap-dev] DEM Default Levels

From Felix Hartmann extremecarver at gmail.com on Wed Mar 21 22:01:43 GMT 2018

oh yeah - how could I actually exclude DEM at level 24? (with intention to
still show in Basecamp/Mapsource, but not on device for level 24). So a map
with DEM only 23-19, while overall resolution of map is 24-18....

On 21 March 2018 at 23:00, Felix Hartmann <extremecarver at gmail.com> wrote:

> Well I actually think hillshading is most useful when looking at zoom
> levels 20km to 200m or 120m - any closer and it just makes the map darker
> without actually improving to recognize contours at all. Right now with no
> input given I ended up with 20km to 200/300m no shading, then shading until
> the closest zoomed in. Exactly the opposite of what I would feel is ideal.
> Okay so I will try around a bit too.
> BTW - I tried to create empty map with DEM only. Basecamp and Mapsource
> don't like it (gave the typical error - there is not enough space on
> device, sending XX MB free XXXX). It does work without problems in
> Basecamp/Mapsource though for display. Would be quite practical to just
> hand mkgmap readymade empty DEM .img files for saving time on map
> compilation.
> On 21 March 2018 at 22:53, Gerd Petermann <gpetermann_muenchen at hotmail.com
> > wrote:
>> Hi Felix,
>> I still have no idea how to calculate reasonable values. So far nobody
>> proposed a formular, and Garmin also uses
>> different values in different maps. So, I think the sample given in the
>> help is a good start. I did not see a problem in
>> my Oregon with a map having 4 levels and DEM with only 2 levels, I think
>> it all depends on personal preferences.
>> Anyway, I'd be happy to implement a default if the community agrees on
>> something, so feel free to sugeest a formular.
>> Gerd
>> ________________________________________
>> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von
>> Felix Hartmann <extremecarver at gmail.com>
>> Gesendet: Mittwoch, 21. März 2018 22:32:56
>> An: Development list for mkgmap
>> Betreff: [mkgmap-dev] DEM Default Levels
>> I'm a bit unclear about the --dem-dists command.
>> It says that at default it chooses sensible values based on .hgt file.
>> Could there be an option to by default choose sensible levels based on .hgt
>> AND --levels command?
>> As far as I can see depending on hgt default will go to show from very
>> zoomed in to 200 or 300m on Oregon 600 (map detail=normal/default).
>> Now should I just calculate the values for my levels based on the help
>> file no matter the input files? Some maps of mine, e.g. Alps use Viewfinder
>> 1" and 3" or SRTM 1" and 3" so if this is related to the .hgt file
>> resolution it is not very clear what happens with mixed input files.
>> Could the default be changed to calculate proper values for --levels or
>> add a value like --dem-dists=levels that chooses sensible defaults? I guess
>> that would be the easiest solution.
>> --
>> Felix Hartman - Openmtbmap.org & VeloMap.org
>> Schusterbergweg 32/8
>> 6020 Innsbruck
>> Austria - Österreich
>> _______________________________________________
>> mkgmap-dev mailing list
>> mkgmap-dev at lists.mkgmap.org.uk
>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> --
> Felix Hartman - Openmtbmap.org & VeloMap.org
> Schusterbergweg 32/8
> 6020 Innsbruck
> Austria - Österreich

Felix Hartman - Openmtbmap.org & VeloMap.org
Schusterbergweg 32/8
6020 Innsbruck
Austria - Österreich
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