How do I check my Los?
Check Line of Sight
To determine line of sight (LOS), draw a link from your access point (e.g. backhaul) to a prospective customer. Use the graph and 3D view to identify any obstructions that might be in the way.
How do you measure line of sight distance?
In that general information you'll find a calculation to determine the distance a person is able to see an object on the horizon. Their calculation is 1.17 X the square root of your eye height.