Hi All,
What is the preferred way of rendering a MapContext to an image in 2.3?
In 2.1 I built up an AffineTransform from the getBounds() envelope to
the (eg 600px by 600px) image size (as Rectangle), created a Graphics2D
img and then used:
renderer.setContext(mapContext);
renderer.paint(g2d, paintArea, transform);
If I try that now I get a NullPointer from the
BufferedCoordinateOperationFactory as below:
21-Feb-2007 11:01:25 AM org.geotools.renderer.lite.StreamingRenderer
processSymbolizers
WARNING: null
java.lang.NullPointerException
at
org.geotools.referencing.operation.BufferedCoordinateOperationFactory$CRSPair.<init>(BufferedCoordinateOperationFactory.java:83)
at
org.geotools.referencing.operation.BufferedCoordinateOperationFactory.createOperation(BufferedCoordinateOperationFactory.java:245)
at
org.geotools.renderer.lite.StreamingRenderer.getMathTransform(StreamingRenderer.java:2053)
at
org.geotools.renderer.lite.StreamingRenderer.processSymbolizers(StreamingRenderer.java:1613)
...
The MapContext is built using new
DefaultMapContext(DefaultGeographicCRS.WGS84);. The source at line 83
above is failing on a comparison between source and target CRS - I would
think my transform would be used to calculate the difference between
source and target but to be honest, I'm pretty confused on how things
work now. Not sure if it's relevant but the underlying data I'm working
with is a boundary shape file from Statistics Canada covering the
Toronto area.
Thanks,
Oliver
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