Hi Andrea,

I have a question with regards to the GridGeometryReducer class, which 
you are credited with.

Consider the following lines:

https://github.com/geotools/geotools/blob/master/modules/library/render/src/main/java/org/geotools/renderer/lite/gridcoverage2d/GridGeometryReducer.java#L86

It is comparing the values of two envelopes, however they are not 
necessarily in the same CRS.

validArea is always just WGS84 (see 
https://github.com/geotools/geotools/blob/master/modules/library/render/src/main/java/org/geotools/renderer/crs/ProjectionHandler.java#L106)

gg.getEnvelope() is in the native CRS of the coverage.

Is this a bug or am I missing something?

Kind Regards,
Niels


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