Martin Schmitz a écrit :
In the vertical direction everything is exactly correct. The problem is
the horizontal.
As I found out just a minute ago, the reason seems not to be the method
GeoMouseEvent.getMapCoordinate(.) because if I move the cursor in the
lower left corner, it returns the correct lat/lon position of my raster!
So the problem must be GridCoverage.evaluate(Point2D,.).
Is there a bug in the transformation from the lat/lon to raster
coordinates? Rounding problems?
Not as far as I know. It seems to work correctly on my own software (but
I may be wrong - more tests would be better). There is no separated
processing for the horizontal and the vertical axis. Most
transformations are handled by java.awt.geom.AffineTransform, which
handle both axis simultaneously. An error may occurs while setting up
the AffineTransform however. I suggest to try the following:
MathTransform tr =
gridCoverage.getGridGeometry().getGridToCoordinateSystem();
System.out.println(tr);
Make sure that the affine transform coefficients are the expected one.
The AffineTransform can be setup by GridCoverage2D at construction time
from the image size and an user-supplied Envelope. Make sure that the
envelope is correct. If the envelope is correct but GridCoverage2D setup
an incorrect AffineTransform, please let me know.
Martin.
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