reading the signal…
Signals / Event / Building permits stream
in Minneapolis, MN·counted·756 all time
Permission for an antenna installation, typically shown as an official document covering communications equipment or structures.
Counted, not streamed: Antenna Permit has no time series, so it is read as a footprint across places. All-time count by city.
Things that happen: permits, collisions, crimes, inspections. All-time counts.