[GRASSLIST:1541] r.los for Lat/Lon Projection?

GRASS GRASS user
1

Hi

I am using grass5.0.2, and have maps in Lat/Long projection.

What can I do to perform a Line of Sight Analysis,
as r.los doesn't work for lat/lon projection?

Thanks in advance
Riaz Randeree

2

I am using grass5.0.2, and have maps in Lat/Long projection.

What can I do to perform a Line of Sight Analysis,
as r.los doesn't work for lat/lon projection?

Convert your DEM to UTM projection & work in that?
Figure out your zone here:
  http://www.dmap.co.uk/utmworld.htm
(create new UTM location then r.proj in from LatLon)

have you looked at r.cva?
  http://www.ucl.ac.uk/~tcrnmar/GIS/r.cva.html

maybe it's better. r.los isn't the greatest..

Hamish