The input surface raster.
Input point or polyline observer features
The feature class that identifies the observer locations.
The input can be point or polyline features.
The number of ground x,y units in one surface z-unit.
The z-factor adjusts the units of measure for the z-units when they are different from the x,y units of the input surface. The z-values of the input surface are multiplied by the z-factor when calculating the final output surface.
If the x,y units and z-units are in the same units of measure, the z-factor is 1. This is the default.
If the x,y units and z-units are in different units of measure, the z-factor must be set to the appropriate factor or the results will be incorrect. For example, if the z-units are feet and the x,y units are meters, you would use a z-factor of 0.3048 to convert the z-units from feet to meters (1 foot = 0.3048 meter).
Use earth curvature corrections
Specifies whether correction for the earth's curvature will be applied.
The coefficient of the refraction of visible light in air.
The default value is 0.13.
Output above ground level raster
The output above ground level (AGL) raster.
The AGL result is a raster where each cell value is the minimum height that must be added to an otherwise nonvisible cell to make it visible by at least one observer.
Cells that were already visible will have a value of 0 in this output raster.
The output raster.
The output will only record the number of times that each cell location in the input surface raster can be seen by the input observation points (or vertices for polylines). The observation frequency will be recorded in the VALUE item in the output raster's attribute table.