reading the signal…
Signals / Object / Mapped places
in Narbonne, OCC·counted·2 all time
A purpose-built structure for viewing distant surroundings or stars, commonly featuring elevated platforms, domes, or telescopes.
Counted, not streamed: Man Made Observatory 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.