In a project we use Sun Shadow Volume (3D Analyst). For a scientific evaluation of the results, we need more detailed information about the calculation basis of the tool. Concretely, we are interested in the field VERT_ANGLE. How is the earth's horizon determined and taken into account?
Does anyone have more information? Or can tell me whom I can turn to?
timothy_hales-esristaff do you have a contact on the 3D dev team to assist with this request?
There is this documentation that may help until you can get further information. It applies to all tools in the visibility/viewshed set
Using Viewshed and Observer Points for visibility analysis—Help | ArcGIS for Desktop