reading the signal…
Signals / Object / Mapped places
in Tucson, AZ·counted·64 all time
A historically important structure or site, typically marked by plaques, distinctive architecture, or commemorative signage.
Counted, not streamed: Historic Monument 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.