I agree, the Chicago area seems to have a large amount of excellent reception plots.
There hasn't been a brutal one I've see yet out of that area in my time here.
By excellent, I mean line of sight, strong signal quality and high chance at reliable reception. Neilbo, go check out some of the threads centering on the San Francisco bay area. They can get quite brutal - meaning no line of sight or terrain obstructed signals and red shaded weak signals. Or, just plain situations were you are 30 miles from the transmitters and reliable reception isn't possible.
You are fortunate over half of your signals are line of sight and the majority are green.
For an over the air system, many would jump for joy with your plot.
Cheers.
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