[OpenLayers-Users] contours polygon render color problem

[Sige]

Hi All,

I have a WMS layer for contours from geoserver, each contour is a ring
shaped polygon consisting of an outer and an inner circle and has to be
rendered with an unique color.  The layer displays OK when all the contours
are inside the view extent. But when the map is moved/zoomed and part of the
contours is outside the map extent, the color of the contours changed --
color of all the inner polygons become a mixture of the original color and
the color of the outer polygon that is partly outside the extent
(fill-opacity=0.5 ).  It looks like that when a ring shaped polygon is
partly outside the view, the inner circle has no effect. I have viewed the
WMS layer on QuantumGIS and it is the same story (different when added
directly from PostGIS).  The following images shows the layer when
totally/partly inside the map extent:

http://osgeo-org.1803224.n2.nabble.com/file/n5430068/contours_1.png 

http://osgeo-org.1803224.n2.nabble.com/file/n5430068/contours2.png 

Any idea how to deal with this problem and get the color consistent?

Thanks

Sige 


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