Vincent wrote: > If you need to warp a map for a strict display purpose, IMHO it's > not to be performed from within grass given that this operation > makes no sense "geographically".
I agree, > Don't know what the context is, but if you just have to rotate an > image output of a map maybe you'd better look towards image > manipulation tools (e.g. imagemagick and the -rotate option, which > can easily be integrated in a script process). pnmrotate is another that I've used with d.out.gpsdrive and GpsDrive's gdal_slice.sh script, together with 'g.region -n' to get the convergence angle. (angle between local projection north vs true north) render map with PNG driver in GRASS, read course-over-ground from Gpsd (gpsd.berlios.de) in watcher mode, pnmrotate and pnmcrop, and then use an image viewer which will update the display when the image changes. (see grass 7 discussions about that). Hamish _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
