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

[openstreetmap-trac]

Reporter: Cobra
[Submitted to the original trac issue database at 2.18pm, Friday, 7th January 2011]

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.

[openstreetmap-trac]

Author: Kompa
[Added to the original trac issue at 12.03am, Wednesday, 12th January 2011]

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.

[openstreetmap-trac]

Author: wildmyron
[Added to the original trac issue at 8.00am, Thursday, 3rd March 2011]

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.

[openstreetmap-trac]

Author: temporalista
[Added to the original trac issue at 1.26pm, Monday, 14th March 2011]

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

[openstreetmap-trac]

Author: Ldp
[Added to the original trac issue at 1.50am, Sunday, 22nd May 2011]

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