OSM Mapping Equity — 38 US cities >500k

Each circle = one city; colour = mean OSM POI attribute completeness (green well-mapped, red under-mapped), size = census tracts sampled. Real data: Census TIGER tracts + ACS 2022 + OSM/Overpass (POI attribute completeness).

Pooled tract Spearman(income, POI diversity): ρ=0.26 (p=0.000) · city income↔completeness: ρ=0.08 (p=0.648)
11,542 tracts across 38 cities