Most of the coverage maps are now interactive. You can zoom in and out or pan left and right, and you also have a choice to use the default map view or the satellite photo view.
At the bottom of each map you will see check boxes. These can be used to hide the coverage plot while you find a location, and then re-enable the coverage plot to check for signal strength at the location.
Two points to remember though, these plots are for mobile radios only, and they display an omni-directional pattern for simplicity even though not all sites have omni-directional coverage. So the coverage area plot is not a guarantee that there may be coverage.