reading the signal…
Signals / Object / Street-level imagery
in Aachen, NW·counted·750 all time
A steep trail is a sharply inclined walking route, typically showing rocky ground, steps, forest, or mountain terrain.
Counted, not streamed: Steep Trail 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.