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Visibility / viewshed algorithm ? [message #50898]

Wed, 25 October 2006 07:09

jgc
Messages: 10
Registered: July 2006

Junior Member

Dear All,

Has anybody implemented a viewshed (visibility) algorithm in IDL for
DEMs, i.e. find out which cells in a digital elevation model are
visible from a given viewpoint. ENVI does it, but I haven't found
anything in IDL.

I am playing around with Wang's * algorithm, but I better ask first
that reinventing the wheel a zillion times.

As a quid pro quo, I have put some of the terrain algorithms I have
developped for IDL at http://www.arolla.ethz.ch/softwmodels.html

Many thanks,

Javier

(*) Wang, J., White, K. and Robinson, G.: 2000, Estimating surface net
solar radiation by use of Landsat-
and digital elevation models, International Journal of Remote Sensing
21(1), 31-43.

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