Sorry, now I find r.viewshed of grass add-on. Yasuo shimada
----- Original Message ----- >Date: Fri, 8 Jul 2011 11:22:09 +0900 (JST) >From: sgw00...@nifty.com >To: grass-user@lists.osgeo.org >Subject: How to estimate viewable area from the top of tha mountain... > > >Dear grass user > >I'm looking for a grass command that unobstructed view area at one station. > >For example... >I want to estimate the veiwable area around the top, when I am in the top of a > mountain. It looks like simple, but I cannot see the opponent if there is a b >arrier in front of my position. > >In bird survey ( bird count in fixed station ), investigator's observation ar e >a (or viewable area) is very important.... > >Is there a grass command that calcurates viewable area, when altitude dem (ra s >t) and the observation point (vect or rast) are given ...? > >Best > >Yasuo shimada ( Japan weather Association ) _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user