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Declared unit below the precise-location threshold
US state privacy statutes define precise geolocation by a radius of 1,750–1,850 feet — an area of roughly 0.89–1.00 km². A declared targeting unit smaller than that circle (R8 at 0.737 km² does not clear it; R9 clearly not) is inside the statutory precise band regardless of how the unit was produced, so the resolution declaration itself carries a privacy claim, not only a precision claim.
Class
Case to account for
Affects
2 conversions
01
Detection
Declared unit's area below ~1.00 km² (equivalently, equal-area radius under ~564 m) in a jurisdiction with a precise-geolocation statute.
02
Mitigation
01
Declare targeting units at R7 or coarser where these statutes apply; keep finer grains internal and analytical
02
Convert statutory radii carefully — the thresholds are in feet, and a feet/metres slip flatters the available headroom by roughly 3x
03
Treat any claim that finer units fall outside the statutes as a legal determination requiring counsel, not a spec assertion
03
Affected conversions
H3platform-native IDs
OPENPointH3
OPENMore in Privacy
Consent-based precision reductionDevice trajectory exposureDifferential privacy noise calibrationHousehold-level targeting riskK-anonymity thresholdsMinimum aggregation windowRegional privacy restrictionsResolution degradation policySmall-cell re-identification riskSparse-audience suppressionTemporal leakage