Who watches the watchers.
Mapping where ALPR cameras (Flock Safety and others) are not — precisely, and with the honesty to distinguish "no cameras here" from "nobody's mapped this yet." Every figure below traces to a named source; a number without one doesn't ship.
Number of ALPR camera nodes mapped in the contiguous US data pull (OpenStreetMap surveillance:type=ALPR tag)
Share of mapped US ALPR camera nodes that carry a named 'operator' tag
Number of mapped ALPR camera nodes with operator tag "Lowe's"
Number of mapped ALPR camera nodes with operator tag "The Home Depot"
Number of mapped ALPR camera nodes operator-tagged to the San Diego Police Department -- the largest single law-enforcement operator by tag count
Number of US counties with zero mapped ALPR camera nodes
Share of OSM zero-camera counties that EFF's Atlas of Surveillance (an independent, FOIA/records-based source) also shows no ALPR-using agency for
Number of zero-mapped-camera counties where EFF's Atlas of Surveillance confirms an ALPR-using agency exists -- i.e. a true mapping gap rather than corroborated absence
Population living in counties with zero mapped ALPR cameras AND no EFF-confirmed ALPR-using agency (the corroborated 'no-fly-zone' population)
Average mapped-ALPR-camera density per 100k residents across the 4 US states rated 'strong' ALPR-restriction law
Average mapped-ALPR-camera density per 100k residents across the 10 US states rated 'partial' ALPR-restriction law
Average mapped-ALPR-camera density per 100k residents across the 35 US states rated 'none' (no ALPR-restriction law)
Correlation (Pearson r) between state-level mapped ALPR camera density per 100k and 2025 violent crime clearance rate, across 51 states
Aggregate 2025 violent-crime clearance rate across the 692 corroborated zero-camera counties with full-year FBI reporting
Aggregate 2025 violent-crime clearance rate across the 549 counties in the top quartile of mapped-ALPR camera density (avg 108.26 per 100k)
Correlation (Pearson r) between county-level mapped ALPR camera density per 100k and 2025 violent crime clearance rate, across 1346 counties with at least 50 violent offenses
Mapped ALPR camera density per 100k residents, Polk County, FL (FIPS 12105)
Mapped ALPR camera density per 100k residents, Brevard County, FL (FIPS 12009)
Mapped ALPR camera count, Harris County, TX (Houston) -- highest raw count among the 3-highest-camera counties in every US state
Mapped ALPR camera density per 100k residents, Yakima County, WA -- highest per-capita density (min. 20 cameras) among the top-3-per-state pool
Mapped ALPR camera density per 100k residents, Fulton County, GA (Atlanta) -- traced to Atlanta's public, budgeted 'Operation Shield' camera program (14 agencies confirmed by EFF's Atlas of Surveillance), not a data artifact
Combined mapped ALPR camera count across Connecticut's 3 highest-camera planning regions (Capitol, South Central, Western) -- required rebuilding county-equivalent geometry from the Census's 2023 cartographic boundary file, since this project's static counties-fips.geojson predates CT's 2022 county-to-planning-region reorganization and has no matching polygons for the new FIPS codes