Dear Hamish and all Than you for some useful advices.
I done upgrade grass versio from 6.4.0 to 6.4.1. > try upgrading to 6.4.1, and the size_column= option should > start to work. (n.b. adding this option was actually inspired by > the desire to vary symbol size for earthquake plots) > also you will find in GRASS 6.4.1 the new extra/ring symbol, > which is similar to basic/circle with fill_color=none, but > allows the dynamic color setting to colorize the border line, > not the fill area. (so the fill area does not mask smaller quakes > at close epicenters) great ! Also, I am bigginer user of grass and unix shell. I made the script referring to your advices as follows; Thank you ! Best Yasuo shimada ( japan weather association ) -- < shell script > http://homepage1.nifty.com/8856/grass_quake_en.html < quake map 13. June > http://homepage1.nifty.com/8856/gg20110613.png < quake map 14. June > http://homepage1.nifty.com/8856/gg20110614.png _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user