Minimum aggregation window

privacy

Reporting audience or visit counts over too short a time window (e.g. hourly) at fine spatial resolution can approach single-visit identifiability even if the raw count clears a k-anonymity floor for a longer window.

Detection

Reporting time grain shorter than the vendor's/policy's documented minimum aggregation window for the chosen spatial resolution.

Mitigation

Enforce a joint spatial-resolution x time-window minimum (finer space requires coarser time and vice versa)
Reject report requests that request both fine space and fine time simultaneously without additional suppression

Affected conversions

Point → H3 exact
Raster → H3 approximate