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Display of two overalapping mosaics

Question asked by geonetadmin on May 15, 2012
Latest reply on May 16, 2012 by mharlow-esristaff
Original User: KevinCRDA

I have two mosaics that I'm working with. I want to put these two mosaics together in a ArcMap document. The mosaics reprensents an urban area of my region and the other is the rural areas.
The first mosaic have a white background (generated with DVP), and the second have a black background (generated with Summit Evolution). I would like to put the first one over the second one, but the white background makes it very ugly because it overlaps the other mosaic.

Is there a way to change the white background into "transparency" in ArcMap so that my two mosaic would overlapp better ? I can't regenerate the first mosaic, so I can't change the background...