I am working on an environmental assessment. A data request has been made which it seems is kind of like a reverse viewshed, in that they want a layer that displays all locations within the raster that can view a single high point.
I have the appropriate raster and point layers, but if I run the Viewshed tool as is, pretty much the entire output is returned as not visible. Any thoughts on a workflow to try to capture what they are looking for? The only thing I've come up with so far is to use a bunch of random points surrounding the high point within the raster and include them in a viewshed, but this would not be a complete analysis of the area.
In this scenario, every cell in the raster would be a potential observer. I'll need the output to display values for those cells that can view the high point (1) versus those cells that cannot (0).
I tried running the standard viewshed tool, using the high point as the observer, along with the hillshade as the raster. The output returned the entire area as (0) with only a few cells directly around the high point as (1).