Hello, I was following along the Large raster data processing wiki with great interest:
http://grasswiki.osgeo.org/wiki/Large_raster_data_processing My question is, when tiles are merged in GRASS using a virtual mosaic created with gdalbuildvrt, will transparent map collars be preserved? I see the man page for r.external talks about the requirement to build a mask or use r.mapcalc, but I don’t understand how I would apply that to a virtual mosaic. Is it possible? Would a certain file format handle transparent border collars better than others? Note that I already have all my tiles as GRASS rasters in my current location, alas I tried using r.patch running in parallel for the job first but it pretty much choked on the task. My attempt was terminated due to a power outage after running several weeks trying to create around 0.5 terrapixel mosaic. Any suggestions how to best build a mosaic would be super appreciated! Thanks, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171 _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
