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[mkgmap-dev] multipolygon with outer polygon within inner polygons

From Marko Mäkelä marko.makela at iki.fi on Mon Feb 15 13:17:42 GMT 2010

Hi WanMil,

> 2nd: the multipolygon code should not remove the boundary tags from  
> the singular ways. Additionally the polygons created by the  
> multipolygon code could be tagged with mkgmap:mp_boundary=yes. This  
> tag could be evaluated in the style definition so the style could  
> differ between the polygons created by the mp code and the lines not  
> touched by mp code.

This sounds sensible to me. The style could have an additional rule  
that filters out generated lines. I would set the attribute on all  
MultiPolygon-generated lines, not just on boundaries. (Someone could  
want to draw coastlines as lines on a separate map layer, for example,  
and the generated lines would interfere.)


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