I got into listening to police scanners a while back. The Broadcastify app is great for live audio, but if you missed something, it's gone. And there's no way to see where things are happening on a map. So I built Blotter. It records 6 LAPD and LASD feeds around the clock, transcribes everything with Whisper, and tries to figure out where each dispatch is referring to. When it finds a location, it drops a pin on the map. The geocoding was the hard part. Dispatchers say things like "responding to Vernon and Central" and you need to know that's an intersection in South LA, not a person named Vernon. I went through a lot of iterations on the NLP before it stopped putting pins in random places. It all runs on one rented GPU. Poke around the map. If you spot a pin that's obviously wrong, let me know.

Blotter

Police radio, mapped in real time

Police radio, mapped in real time