reading the signal…
Signals / Object / Street-level imagery
in Los Angeles, CA·counted·800 all time
Fast-moving whitewater rapids feature turbulent waves, spray, cascades, and exposed rocks in a river channel.
Counted, not streamed: Whitewater Rapids has no time series, so it is read as a footprint across places. All-time count by city.
Things that physically exist: street furniture, signs, buildings. All-time counts.