Google Maps has opened up access to resources that would take considerable work and expense to access. Just purchasing software that can do ray tracing over a geographic area 10 years ago would have cost tens of thousands of dollars. Now “HeyWhatsThat” has leveraged Google Maps to do just this and it is free.
At the top of the frame, shows a panorama of the skyline seen from that site. The list on the right shows what mountain tops can been seen and distance to them.
HeyWhatsThat is a great starting point in checking out coverage area. I wouldn’t throw away your $50,000 coverage software just yet as that will be a bit more accurate using better algorithms to calculate coverage such as Longley Rice and TIREM as well as their own tweaks.