[mkgmap-dev] is_in filter

Tue Feb 7 21:48:36 GMT 2017

well - that's why I think it should be precompiled. Do it once - no matter
if planet takes 48 hours on a potent machine - then redo it like every two
years... I do believe it will slow down mkgmap too much if compiled at the
same time as the maps themselves.

On 7 February 2017 at 22:41, Gerd Petermann <GPetermann_muenchen at hotmail.com
> wrote:

> OK, got the idea. Not sure if that can be computed for planet in a
> reasonable time, but for a single tile it would not be too much.
>
> I have to think about this for a while.
>
> Gerd
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von
> Felix Hartmann <extremecarver at gmail.com>
> Gesendet: Dienstag, 7. Februar 2017 22:20:04
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] is_in filter
>
> On 7 February 2017 at 21:54, Gerd Petermann <GPetermann_muenchen at hotmail.
> com<mailto:GPetermann_muenchen at hotmail.com>> wrote:
>
> looks simple enough, but what would be the rule to set the new special
> tags like mkgmap:urban?
> Do you think those could be calculated somehow using only the data used to
> compile the bounds file?
> If yes, please give more details.
>
> well that's the hard part - I know. It could be a mix of several things -
> best I could think of is densitiy of POI or density of addresses.
>
> I'ld guess looking at density of POI and density of building=* - plus the
> bigger the size of the building the more it has to be assumed it's urban
> and some crosscheck with the bounds data would be enough. That should then
> end up in a static file just like sea data and bounds. It would also of
> course be possible to use that data to exclude buildings in cities - and
> more ideas.
>
> Even just density of POI and density of building=* (look at how much space
> the building occupies - e.g. if inside a squared area more than 20% of
> space is taken up by buildings - it's highly urban. 5-20% is a bit mixed,
> <5% is rural.
>
>
> --
> 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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mkgmap.org.uk/pipermail/mkgmap-dev/attachments/20170207/a6b4bf6e/attachment.html>