Hi Niklas, Same for me: the PNG driver draws thinner and thinner arrows when you increase the resolution. If you lower the resolution it's okay though.
If you do need such a high resolution (for a poster?), you might try the CAIRO driver (g.manual displaydrivers) which behaves quite differently when producing PNGs. Arrows are drawn with a thicker pen indeed (even at high pixel resolution) but you might be surprised by the raster rendering... and files get very large. Nicolas Le mardi 02 novembre 2010 à 16:12 +0100, Niklas Neckel a écrit : > Dear all, > > I'm trying to plot arrows, representing length proportional to magnitude in a > printable high resolution map (with d.rast.arrows). Here is what I tried: > > #!/bin/sh > export GRASS_WIDTH=10000 > export GRASS_HEIGHT=10000 > export GRASS_PNGFILE=testpng.png > export GRASS_PNG_COMPRESSION=0 > #export GRASS_RENDER_IMMEDIATE=TRUE > export GRASS_TRUECOLOR=TRUE > g.region fig_arrows > d.mon start=PNG > d.rast map=backgro...@permanent > d.rast map=magnitude_...@permanent > d.rast.arrow map=direction_...@permanent type=compass arrow_color=black > grid_color=none x_color=black unknown_color=red skip=12 scale=20 > magnitude_map=magnitude_...@permanent > d.mon stop=PNG > eog $GRASS_PNGFILE& > > Unfortunately the plotted arrows are quite slim now... is there another > solution to achieve this goal? > > Many thanks, > > Niklas > > _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
