So perhaps you read FCC Technological Advisory Council is initiating a noise floor inquiry That is something probably long overdue in my opinion.
I have often wanted to map the bad areas around town. Seems a Raspberry Pi computer with a RTL-SDR stick and a USB GPS could the basis of sampling the noise floor on various bands and logging that and the location.
And then a way to download this and overlay it on a map when you get home.
Seems like a good SDR project for someone. I kind of wish I knew how to do it myself.