Opened 11 years ago

Closed 10 years ago

#1113 closed defect (fixed)

Mapnik doesn´t render hole in multipolygon forests

Reported by: Tomas Tichy 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 Changed 11 years ago by Tom Hughes

Owner: changed from Tom Hughes 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 11 years ago by Tom Hughes

Priority: majorminor

comment:3 in reply to:  1 Changed 11 years ago by Tomas Tichy

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 11 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: fixed
Status: newclosed
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