Is it possible to clip a raster after having it read with readGDAL ?
Instead of using region.dim() and offset(), I would like to clip it "on 
the fly" to visualize statistics associated with objects of different 
size. The clip is square -specified with upper left and lower right 
corners- and fit with the pixels size. If you have an interactive way, 
I'm even more interested.

Etienne


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