I am performing several viewshed analyses. As I wanted to observe how the viewshed changes when setting a different value for OffsetA I noticed something strange was going on with the cell count.
Firstly, I performed the analysis without an offset value. These were the results:
The attribute table states that the cell count is 208141. Then I performed another analysis with an OffsetA of 2m, and I got these results:
Obviously, the viewshed is larger (which I expected it to be), but the cell count as mentioned in the attribute table is lower (113111).
Since I set invisible cells to be returned as NoData, I suspected it might had something to do with that. Therefore I performed the analysis again, but without selecting the option for invisible cells to be displayed as NoData.
This did not change anything and the results were exactly the same.
Am I doing something wrong or am I overlooking something? I am using ArcMap 10.3.