Morten Sickel wrote: > I am working with some aerial photograps, I have sets of pancromatic black > and white pictures and colored infrared pictures. the pan-images were > imported directly and displays quite qickly, each image being about 150M. > When I imported the colored IR pictures, they came in as three bands, each > about the same size as the pancromatic picture. Then I used r.composite to > recreate the colored picture, and got a file on about 500M. When I use d.rast > to display the composite file, things takes ages, nothing seems to happen for > a long while. d.rast uses more or less 100% of the CPU but not much memory. I > recall the xdriver being slow when displaying rasters with a large color > space as an issue some years ago, but I thought that worked better now.. Are > there anything I can do to make it work better? I have presently 24 bits > color depth, but that is going to increase to 36 bits (3x12bits) later on, if > that goes even slower, I will have a problem...
1) check "g.region -p" If rows & columns is much greater than 10000x10000 you might want to consider using a more coarse resolution. Check r.info for the images too. 2) Try d.rgb instead of r.composite. Hamish __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ grassuser mailing list grassuser@grass.itc.it http://grass.itc.it/mailman/listinfo/grassuser