Hi,

I added a new symbol in SVN called extra/ping.

example:
  http://grass.osgeo.org/grass-wiki/images/Symb-ping.png

another example showing with new d.vect dynamic rotation and size
from DB columns:
  http://bambi.otago.ac.nz/hamish/grass/screenshots/ping_test.png

commands to make that:
#spearfish
g.copy vect=bugsites,local_bugs
v.db.addcol local_bugs col='size int'
echo "UPDATE local_bugs SET size = 45 - cat/2" | db.execute
v.colors local_bugs color=bcyr column=size -n

g.region rast=elevation.10m
r.shaded.relief elevation.10m

g.region n=4921680 s=4914130 w=590120 e=597670 res=10

d.mon x0
d.resize w=500 h=500

d.rast elevation.10m.shade

d.vect local_bugs rot_col=cat icon=extra/ping size=25 -a \
   size_col=size  color=none

d.out.file -c ping_test


other symbols:
  http://grass.osgeo.org/wiki/IconSymbols


enjoy,
Hamish


ps- we discovered that the Chlorophyll-a colormap from NASA's ocean
color website looks really good with slope maps. (They are both
rather similar in value & logarithmic distribution)
A slight tweak to have it asymptote to 0.0 instead of 0.1 would get
rid of the white blotches (to adjust see the generation script in the
palettes's svn history log in grass-addons svn).
example: 
  http://bambi.otago.ac.nz/hamish/grass/screenshots/slope_chlr.png

g.region -g rast=slope
d.mon x1
d.resize w=634 h=478
r.colors slope 
rules=./grass-addons/raster/r.colors.tools/palettes/palette_chl_etc.gcolors
d.rast slope

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