Geometries reprojected to 4326 or 900913 that cross the dateline fail to render
depending on map/tile extent
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Key: GEOS-4246
URL: http://jira.codehaus.org/browse/GEOS-4246
Project: GeoServer
Issue Type: Bug
Components: WMS
Affects Versions: 2.1-beta1
Reporter: Shane StClair
Assignee: Andrea Aime
Priority: Minor
Attachments: example.zip
I have a few geometries in EPSG:3338 that cross the dateline and aren't
rendered in EPSG:4326 or EPSG:900913 WMS requests depending on map/tile extent.
A workaround for this is to include a buffer value equal to the total pixel
width of the world map at the current zoom level (256 * 2 ^ zoom, I think).
This log message seems related, but doesn't show up consistently:
WARN [geotools.rendering] - Assuming rendering buffer = 0, but estimation is
not accurate, you may want to set a buffer manually
This is using 2.1-beta1 with and without the following continuous map wrapping
flags on the JVM:
http://blog.geoserver.org/2010/02/23/geoserver-map-wrapping/
http://geo-solutions.blogspot.com/2010/02/geoserver-continuous-map-wrapping.html
-DADVANCED_PROJECTION_HANDLING=true
-DUSE_STREAMING_RENDERER=true
Example shapefile is attached. Add layer with declared epsg 3338, then open
openlayers app. Adjust epsg to 4326 and use the following bounding box:
bbox=-180,50,-140,70
Switch to tiled mode, zoom in to level 3 or above and pan around to see
geometries get cut off at tile borders. In single tile mode, geometry also
fails to render if map extent is too far east.
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