Opened 7 years ago

Closed 6 years ago

Last modified 6 years ago

#4809 closed defect (worksforme)

Mapnik produces water-filled tiles at zoom=18 for big area in Siberia

Reported by: pvm96@… Owned by: mapnik-team@…
Priority: major Milestone:
Component: mapnik Version:
Keywords: water, zoom, 18 Cc:


If you look at any place inside this area zoomed at level 18, you'll see that the whole area is filled with water, even where there is ground:

Some pictures of the edges of this effect are: East South West North

I've found no strange geometry at the edges of the rectangle, and the edges do not always coinside with tiles edges (see this for example:

The problem affects a huge 2000x200km area, I have no idea what's causing it, guys at talk@… suggested a bug report, which I'm filing now.

Change History (4)

comment:1 Changed 7 years ago by pvm96@…

There is a small discussion in talk maillist:

comment:2 Changed 7 years ago by Ldp

I've seen strange effects like this in that area of the world before. It was a large pink-ish area then.

I notice it's not exactly on a tile boundary either:

I don't know what causes it. IIRC, it resolved itself spontaneously the last time it happened, a few years back.

comment:3 Changed 6 years ago by pnorman

Resolution: worksforme
Status: newclosed

wfm - and we've switched coastline sources now, so we'd need a new area to see if there's an issue again.

comment:4 Changed 6 years ago by pvm96@…

yep, it seems to be fine now.

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