Hi! What about setting the "black areas" to Nodata? (or even converting the black to real nodata values) Properties -> Transparency -> No data value : Insert the black value here ..
Or use the rastercalculator to get rid of the black regards Werner On Wed, Apr 12, 2017 at 3:45 PM, Madry, Scott <mad...@email.unc.edu> wrote: > Hello, QGIS gurus and friends. > > > Some of my students are georeferencing historical maps in QGIS, and want to > remove the black edge areas that appear after the raster arrays are warped, > or at least make these and only these black areas completely transparent. > Seems a simple task? Thanks- Scott Madry, UNC Chapel Hill, USA > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user