OpenStreetMap Forum

deadrabbit

Member

Registered: 2009-09-08

Posts: 4

Lake shape wrong in openstreetmap.org rendering

The original outline for Lake Champlain was using a single way. When I tried to add more detail, I ran in to the node limit, so I broke it up in to multiple ways. Now, the renderings on openstreetmap.org (both mapnik and osmarender) are wrong in two locations:

http://www.openstreetmap.org/?lat=44.74 … rs=B000FTF
http://www.openstreetmap.org/?lat=44.05 … rs=B000FTF

What did I do wrong? I originally assumed it would take some time to update perhaps, but it has been a few weeks. It looks fine in josm, and navit. It's a major lake in the US, so I'd like to get it fixed.

Thanks!

Ldp

Member

From: NL - Zeeland

Registered: 2008-07-22

Posts: 820

Re: Lake shape wrong in openstreetmap.org rendering

The problem was that the outer members were not forming a single ring, but they formed 3 slightly overlapping polygons. I have split the ways where they crossed the lake, and removed those sections. There was also a second multipolygon relation for the southern part of the lake, which was neither correct, nor needed, and which I've removed.

deadrabbit

Member

Registered: 2009-09-08

Posts: 4

Re: Lake shape wrong in openstreetmap.org rendering

Thank you! I guess the advice I received on how do this was a little off.