reading the signal…
Signals / Event / Building permits stream
in Pasadena, CA·counted·1 all time
Official approval for constructing a retaining wall, typically shown as a construction authorization or posted notice.
Counted, not streamed: Retaining Wall 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.