Hi,
Matthias Julius wrote:
Am 14.08.2010 08:39, schrieb Sebastian Klein:
The situation you describe (multipolygon: natural=water; outer way:
leisure=park & natural=water), is a little ambiguous, though: In strict
interpretation, there would be 2 water areas. This is probably not the
intention, so I would consider natural=water on the outer way a legacy
artefact and ignore it.
Well, I wouldn't. I would call that a bug in the data.
Maybe bug is too harsh, but yes it is overspecified. There was a time
when people said that the "inner" way should have the same tags as the
"outer", so in addition to Sebastian's interpretation, it is possible
that the whole area is indeed a lake with an island.
There's a rather complex specialist view in the OSM inspector for
multipolygons:
http://tools.geofabrik.de/osmi/debug.html?view=multipolygon&lon=-1.10156&lat=52.74560&zoom=7&overlays=invalid_geometry_hull,duplicate_ways,intersections,intersection_lines,ring_not_closed_hull,ring_not_closed,unconnected_end_nodes,touching_inner_rings_hull,touching_inner_rings,role_mismatch_hull,role_mismatch,duplicate_tags_hull,duplicate_tags,multipolygons_type_is_boundary,type_is_boundary,ways,role_markers,way_end_nodes,way_nodes
This also includes highlighting polygons where inner and outer tags are
the same.
Bye
Frederik
--
Frederik Ramm ## eMail [email protected] ## N49°00'09" E008°23'33"
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