I am trying to understand viewshed analysis in ArcGIS 10.1.
After you add fields such as RADIUS1, AZIMUTH1 to your observer vector attribute table, does it automatically calculate visible/non-visible areas within the specified radius and azimuth? Or do you have to use a different tool?
What I really need to find out is the areas visible from each monument location (including whether the monuments themselves are visible to each other, if they are close), in such a case what would be the best way to approach this?
Also, is it necessary to always convert xy coordinates of sites (already added as File Geodatabase Feature Class) to Observer points using observer points tool? I am only asking because for some areas, I have more than 16 monuments and I think you can only have a max of 16 observation points.