Bidstream truncation

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High-volume bidstream feeds often truncate or sample records under load, and truncated records can silently drop the geo field entirely or truncate coordinate precision, biasing which impressions are geo-resolvable.

Detection

Rate of missing/null geo fields spikes correlated with feed volume/load, or coordinate precision degrades under peak QPS versus off-peak.

Mitigation

Monitor geo-field completeness rate as a function of feed volume and alert on drops
Treat volume-correlated geo-completeness dips as a truncation signal, not random missingness, when weighting geo-based aggregates

Affected conversions

Point → H3 exact
Raster → H3 approximate