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Back to the catalogueAdvertising semanticsCase 12 of 22
IP-derived location
IP geolocation is coarse and often centroid-biased; it is not physical presence, and it is not a point — it is a disk at a stated confidence.
Class
Case to account for
Affects
2 conversions
01
Detection
locationSource = ip.
02
Mitigation
01
Never point-convert an IP lookup — use the probabilistic crosswalk (ip-to-h3)
02
Cap resolution to the accuracy radius
03
Label matching semantic explicitly (not physical_presence)
03
Affected conversions
PointH3
OPENIP lookupH3 (probabilistic crosswalk)
OPENChapter
IP Lookup To H3More in Advertising semantics
Bidstream truncationCarrier NAT / multi-family IP poolingCorridor boundary oscillationCross-device location stitchingDeclared resolution exceeds input accuracyDestination interestExcluded-area leakageFrequency across overlapping targetsGPS noise / boundary oscillationGPS-derived location accuracyHome location inferenceLocation confidence scoringLocation interest versus presenceLookback window sensitivityMixed-provenance channel bundlePhysical presencePooled location sources in delivery logsPublisher-declared locationRecent presenceTreatment/control contaminationWork location inference