[mkgmap-dev] [PATCH v1] MP: Join tags by intersection and not by union

Sat Mar 27 18:55:37 GMT 2010

> On Thu, Mar 25, 2010 at 08:12:51PM +0100, WanMil wrote:
>> Did anyone test this patch?
>> I recommend to commit it because it fixes an incompatibility with the
>> "official" definition of multipolygons.
>
> I just did.  I also tried recompiling the same map without the patch.
> Same size gmapsupp.img (both look fine in QLandkarteGT).  The only
> difference in the log file (after stripping the timestamps) is the format
> of these messages:
>
> WARNING (MultiPolygonRelation): 63240004.osm.gz: Polygon 4611686018427486163(15P : (45329139[15P]) carries role inner but is not inside any other polygon. Potentially it does not belong to this multipolygon.
>
> The patch replaces the " : (" with ")(", balancing the parenthesis.
>
> 	Marko

I don't expect that you see any difference in the filesize of the 
gmapsupp.img. It's just a slight change how to tag polygons consisting 
of multiple single ways with a non unique tagging.

WanMil