reading the signal…
Signals / Event / Building permits stream
in Minneapolis, MN·counted·13K all time
Official permission for door installation or alteration, typically represented by paperwork, an approval notice, or inspection record.
Counted, not streamed: Door Permit has no time series, so it is read as a footprint across places. All-time count by city.
Things that happen: permits, collisions, crimes, inspections. All-time counts.