Opened 8 years ago

Closed 8 years ago

#3441 closed defect (worksforme)

large parts of the Indian Ocean (and other parts of the world) are rendered purple in zl17 only

Reported by: Cobra Owned by: mapnik-team@…
Priority: critical Milestone:
Component: mapnik Version:
Keywords: Cc:

Description

This was discovered yesterday evening in IRC.

Example: http://www.openstreetmap.org/?lat=-7.31065&lon=72.4109&zoom=17&layers=M

It happens only in zoomlevel 17, 16 and 18 aren't affected. Rerendering doesn't help.

Most times there is a simple purple overlay, but some areas showed a "barcode" looking purple pattern, esp. at the eastern border of the affected area. Some areas show a darker purple than others.

I traced the outline in josm, see attached file. Marked is a strange area with a non-rectangular border.

Attachments (1)

mapnik_purple_bug_02.osm (25.2 KB) - added by Cobra 8 years ago.

Download all attachments as: .zip

Change History (5)

Changed 8 years ago by Cobra

Attachment: mapnik_purple_bug_02.osm added

comment:1 Changed 8 years ago by Komяpa

This color can also be seen near "South Pole" which is rendered on (0,0) http://osm.org/go/aqqqqrK00-

"Barcode" might be explained as overflow on boundary near South Pole, which becomes "horizontal" dashed line. Still can't see why it becomes wide polygon.

Hopefully patch at http://trac.openstreetmap.org/ticket/3452 may fix it.

comment:2 Changed 8 years ago by wildmyron

This seems to have been fixed along with ticket:3452

Took some time after patch landed before South Pole was fixed and now that it has when I rerender tiles in my area (Perth, Western Australia) the purple background is gone.

comment:3 Changed 8 years ago by temporalista

Summary: large parts of the Indian Ocean are rendered purple in zl17 onlylarge parts of the Indian Ocean (and other parts of the world) are rendered purple in zl17 only

The purple rectangles are still in many areas, not only the Indian Ocean E.g.:

http://www.openstreetmap.org/?lat=-1.20704&lon=116.82483&zoom=17&layers=M

http://www.openstreetmap.org/?lat=-2.85286&lon=-78.99426&zoom=17&layers=M

The South Pole rectangle is still rendered close to Africa, although there is no wrong data behind.

http://www.openstreetmap.org/?lat=-89.9999&lon=-0.00001&zoom=17

comment:4 Changed 8 years ago by Ldp

Resolution: worksforme
Status: newclosed

I can't see any traces of purple at any of the given example areas anymore.

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