Opened 10 years ago

Closed 10 years ago

#1113 closed defect (fixed)

Mapnik doesn´t render hole in multipolygon forests

Reported by: vrabcak Owned by: jburgess777@…
Priority: minor Milestone:
Component: mapnik Version:
Keywords: Cc:

Description

Compare mapnik and osmarender view at following link:
http://www.openstreetmap.org/?lat=49.6852&lon=16.0083&zoom=14&layers=B00FTF

It is obvious that Mapnik doesn´t render hole in multipolygon forest. The same problem is also in other areas with multipolygon relations on forests.

Change History (5)

comment:1 follow-up: Changed 10 years ago by tom@…

  • Owner changed from tom@… to jburgess777@…

There is a substantial difference of opinion on the correct was to use a multipolygon relation which may be partly to blame here. Jon is the expert, so I'll push this over to him.

comment:2 Changed 10 years ago by tom@…

  • Priority changed from major to minor

comment:3 in reply to: ↑ 1 Changed 10 years ago by vrabcak

Replying to tom@compton.nu:

There is a substantial difference of opinion on the correct was to use a multipolygon relation which may be partly to blame here. Jon is the expert, so I'll push this over to him.

I don´t think that this is the issue, because multipolygon buildings are rendered correctly.

comment:4 Changed 10 years ago by jburgess@…

It fails to render correctly because the inner rings are clockwise. The current Wiki definition of multipolygons says this should be acceptable but this does not work with mapnik. I'll look at fixing up the ring direction during the osm2pgsql conversion process.

comment:5 Changed 10 years ago by FredB

  • Resolution set to fixed
  • Status changed from new to closed
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