Hello,
I am using ArcGIS 10.2. I have a need to run the Viewshed toolbox tool on an elevation raster based on a single observation point AND only have the viewshed for the specified distance (ex: 2 kilometers from the observation point). I initially though that the Viewshed tool would have a distance parameter but it doesn't. I saythat because I initially came across an Esri Viewshed example at Geoprocessing - Viewshed | ArcGIS API for JavaScript. This is the client side that calls a GP Service. It sends a distance down to be used by the tool that the GP Service calls. After finding that the Viewshed tool itself does not take such a parameter, I figured that there must be some workflow to accomplish the task which would combine the Viewshed tool with something like buffer/clip operations . In my tests, I was able to do the following:
1) Create 2 kilometer BUFFER using my observation point as input
2) Create a Viewshed raster by using the elevation raster and my observation point
3) Use the Data Management Clip tool to use the output from #2 with the buffer from #1
That got me most of the way but the Data Management Clip only seems to clip based on a rectangle, so it created the smallest rectangle off of my circular buffer. I could not use the Analysis Clip tool because that did not accept a raster input.
So, my question is.... what is the proper workflow to do a Viewshed that is based on a designated distance?? My process above got me only so far because my clipped result was not a circular clip like I wanted. The rectangle clip I got included some areas outside of the distance of the buffer because it had to create a rectangular clip.
Any thoughts?
Thanks - Peter
