topic Determining the include angle after viewshed in ArcGIS Spatial Analyst Questions

Determining the include angle after viewshed

JeffVan_Etten — Fri, 09 Sep 2011 10:31:02 GMT

I am trying to work out the best method for determining the include angle after running the viewshed tool. Basically, I want to work out the angle of visibility from where there viewshed said my points were visible back to where the points are. I have seen this done in other software packages (mainly dealing with wind farms). Any thoughts or suggestions?

Thanks
Jeff

Re: Determining the include angle after viewshed

EricRice — Fri, 09 Sep 2011 14:56:14 GMT

Jeff,

So you want some attribute per visible cell that would tell you the angle threshold for visible/not visible from a given set of points?

Eric

Re: Determining the include angle after viewshed

JeffVan_Etten — Fri, 09 Sep 2011 15:16:49 GMT

Eric

Well I imagine that this is an attribute value that measures the angle of a set of points that are visible. There is a correlation to proximity and also the number of points visible. i.e. 1 point visible might only have a 0 - 5 degree included angle, but where more than 10 are visible might be > 45 degress included angle. Hope that makes sense.

I am attaching an example of this. [ATTACH=CONFIG]8892[/ATTACH]