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[mkgmap-dev] [index] Automatic location completion

From maning sambale emmanuel.sambale at gmail.com on Wed Feb 23 01:35:20 GMT 2011

Nice!  Will test later.  Just one question, can this handle relation boundaries?

On Wed, Feb 23, 2011 at 6:34 AM, WanMil <wmgcnfg at web.de> wrote:
> After the index branch has been developed so far that we can use the results
> in MapSource (thanks to Steve!!) there is a big need for a mechanism to fill
> missing location information.
> There has been a lot of discussion about that. It stopped because it was
> quite theoretical (from my point of view). Therefore I have started to
> implement a prototype osm hook that tries to complete the missing location
> information. I think the is_in tag is quite problematic therefore I decided
> to use the addr tags.
> Attached is a *very* early implementation that makes use of the boundary
> polygons. It checks all nodes and ways/polygons within all boundary polygons
> and fills the missing addr tags.
> I think this is a better foundation for the discussion how we want to fill
> the missing location information.
> Before flaming me about terrible code please be aware that:
> * the patch is not optimized
> * it's version 1, so far away from handling all situations / countries
> * it's a very early prototype
> I would be happy if you try it and make some proposals how it could be
> improved.
> Some improvements I already know and thinking about:
> * The new hook should run after the multipolygon finishing and not before
> * The is_in tag should be handled
> * boundary information propagation => First go through all boundaries and
> add the information from higher levels to lower ones, i.e. add addr:district
> to all city boundaries within that district
> * Use landuse=residential information in combination with the place nodes
> * In case a boundary level is missing (which mostly will be the case for
> countries admin_level=2), select the addr information from all nodes and
> ways within a boundary by using the most used addr-tag value. (in germany
> the addr:country=DE should be the most used)
> Have fun!
> WanMil
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