[OSM-dev] Data confusion in Mapnik rendering

Marc Schütz schuetzm at gmx.net
Thu Dec 18 17:41:31 GMT 2008


http://www.openstreetmap.org/?lat=49.9853&lon=10.874&zoom=14&layers=B000FTFT
http://www.openstreetmap.org/browse/way/4289879/history

The lake in the above link is rendered as if it were a street ("Heilig-Grab-
Straße"), although the data layer shows nothing suspicious (tagged correctly, 
last change almost a year ago). Interestingly, if you zoom out one level, it is 
rendered correctly.

In reality, the concering street is some kilometers south, in the city of 
Bamberg, and is rendered correctly:
http://www.openstreetmap.org/?lat=49.90059&lon=10.89563&zoom=16&layers=B000FTTT

I wonder whether this has something to do with the lake being a multipolygon.

Regards, Marc

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