OpenStreetMap

Osmarender does not like my changes

Posted by lyx on 24 January 2010 in English (English)

Yesterday I changed the tagging of several lakes and rivers around and including Lake Skutari from natural=coastline to natural=water or natural=riverbank. Today the Osmarender layer in the map shows most of the area around these lakes and rivers as water, see http://osm.org/go/xefe49?layers=0B00FTF
I can find no leftover coastline objects with josm search, and I checked again my lake/riverbank areas and find they are closed, non-self-overlapping ways. Any ideas what else to look for?

Comment from xeen on 24 January 2010 at 14:53

I haven't checked exactly, but maybe is the lake too complicated for Osmarender? If I remember correctly, "coastline" is used to split up very long ways but still be able to render large lakes or similar. From what I can tell, the lake you pointed out looks very complicated, maybe that's the reason?

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Comment from lyx on 24 January 2010 at 16:29

according to the map features pages, coastline should not be used for lakes; however, it is quite frequently done for large lakes. I have now reduced the complexity of the shore line a bit (down to 1022 nodes from 1176) by removing the triangular artefacts that the PGS importer likes to create. Lets see if that helps.

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Comment from lyx on 24 January 2010 at 17:04

By removing redundant nodes (nodes in the middle of an apparently straight line) I'm now down to 964 nodes. I have seen other lakes of comparable number of shoreline nodes that are rendered ok, so maybe that will work.

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