You would want to enable GPS and the full database to do that. (And manage your Service Types.) But it’s not all that exact. I used it on a couple of trips from Ct. to Fla. on I-95. While it did drop systems that were going out of range and pick up those coming into range, while I had the Range set as low as it would go, it still wasn’t borderline cutoff. I’ve never bothered with the rectangular patterns, instead sticking with the circular. But if I were to try what you want with the Ct. State Police, and get the scanner to jump from Troop to Troop, I doubt it would give me anything close to what the Troop’s coverage areas are. It would work but I believe you’d need to do a lot of custom rectangular plotting.