reading the signal…
Signals / Object / Mapped places
in Mannheim, BW·counted·25 all time
A tradesperson who installs and repairs pipes, faucets, drains, and fixtures, usually shown with tools or plumbing equipment.
Counted, not streamed: Plumber 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.