[Gvsig_english] SEXTANTE Visibility Tool

[Antonio Falciano]

Il 22/12/2010 0.10, Angus Jeffery ha scritto:
> Hello
> This Sextante Visibility tool is great. However, does anybody know if
> it is possible to show the visibility of more than one point, for
> example an array of wind turbines? Is it possible to do this by
> referring to a .shp or .dxf which contains point data and contains
> height attributes, etc.? Does anybody know if the tool takes into
> account, or if it is possible to take into account earth curvature -
> this is unlikely to be significant at close range, but could be at
> 10km plus.
Hi Angus,
you could calculate "cumulative viewsheds" in SEXTANTE using its
Modeler (or Beanshell scripts). You should make an intensive use
of Map Algebra by Raster Calculator in order to take in count the
effects of earth curvature and atmospheric refraction (because Visibility
tool doesn't actually), to consider the heights of wind turbines,
observers and so on...

Cheers,
Antonio

-- 
Antonio Falciano
http://www.linkedin.com/in/antoniofalciano