LineOfSight

An error if the line of sight could not be evaluated. Null if successful.

The part of the line of sight that is not visible to the observer. If the line of sight between the target and observer is unobstructed, or if an error occurs during evaluation, this geometry is null.

Returns the visibility state between the target and observer locations. A value of 1 indicates a clear line of sight and 0 indicates that the target is not visible to the observer. If an error occurs during evaluation, NAN is returned. The end point of LineOfSight.visibleLine and the start point of LineOfSight.notVisibleLine indicate the position at which the line of sight is first obstructed.

The part of the line of sight that is visible to the observer. If there are no portions of unobstructed line of sight between the observer and the target, for example if the observer point is below the terrain, the geometry is null. If an error occurs during evaluation, the geometry is null.