The definition of the multipolygon says that the tags from the
multipolygon are used for the outer polygons ("Tags describing the
multipolygon (e.g. landuse=forest) should go on the relation. The outer
way(s) should be left untagged, unless they describe something in their
own right."). If these multipolygons are dropped the tag information of
the multipolygon is lost.


there are 2 common forms of tags on myltipolygon. both are supported in Mapnik and Osmarender.
Ideally mkgmap should work the same way

1) tag is on the relation and will overwrite any tag with same key on the outer way. A different tag can still be applied to the ways.
2) tag is on the outer way, again additional tags can be set

in both cases I think the way must be duplicated

 
I propose to revert this commit unless there are hard reasons for it.

WanMil
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