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lake crossing 180th meridian drawn the long way round #1647
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Author: Ldp As #1612 and #1613 also show, this is a difficult problem to attack. Osmarender doesn't do any better here, either. Perhaps osm2pgsql should take it upon itself to create 2 objects for dateline crossing features, but that's not my call. Handing this one over to Jon. |
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Author: pnorman Not an openstreetmap.xml or openstreetmap-carto issue. It could be an osm2pgsql issue, except there's no dateline crossing features the way OSM data is defined (WGS84). A line going from (179.99,0) to (-179.99,0) is a 40,075 km line along the equator (https://trac.openstreetmap.org/ticket/1612#comment:11) |
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Reporter: robx
[Submitted to the original trac issue database at 5.29am, Thursday, 12th March 2009]
I've mapped a lake that crosses the 180th meridian: http://openstreetmap.org/browse/way/31254026 or http://openstreetmap.org/?lat=65.86427&lon=-179.99315&zoom=15&layers=B000FTT . This should be valid data, describing a lake in that area of the world. However, the mapnik slippy map rendering draws the lake all across the world, see eg http://www.openstreetmap.org/?lat=65.8642&lon=24.1557&zoom=12&layers=B000FTF
I'm not sure if this is in osm2pgsql or mapnik.
There's some other rendering oddities near the 180th meridian, but those may have to do with the fact that coastline doesn't actually connect there, and I've hesitated to join it up.
See also http://wiki.openstreetmap.org/wiki/180th_meridian
Cheers
Robert
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