Modal-cell centroid pile-up

measurement

Assigning each probabilistic observation to its single most-likely cell piles ambiguous mass onto registry/population centroid cells, manufacturing false density at vendor fallback points.

Detection

Impression density spikes at known centroid cells (city centers, ZIP centroids) uncorrelated with population or POI mass.

Mitigation

Apportion fractionally by probability mass (expected_probabilistic basis)
Never report modal-cell rows as measured
Flag integer counts from probabilistic sources

Read the full article: IP Lookup To H3 →

Affected conversions

Point → H3 exact
IP lookup → H3 (probabilistic crosswalk) approximate