reading the signal…
Signals / Event / Street-level imagery
in Compton, CA·counted·7 all time
An outdoor tennis court is a marked playing surface, typically enclosed by fencing and equipped with a net.
Counted, not streamed: Tennis Court Day 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.