X, Y, Z, and SpatialReference describe the position of the viewing location. Setting an appropriate spatial reference for the position of the camera allows the camera to be applied across views with different spatial references. The camera's relative location to the Earth remains unchanged. Project the camera if its spatial reference has a different datum than the map's spatial reference using the ArcGIS.Core.Geometry api. If the spatial reference is null the camera assumes the spatial reference of the map to which it is applied.