NoVA SNAP-Authorized Retailer Atlas, 1965-2025 (Keystone GIS Day 91)

Twenty years of SNAP retailer authorizations, exits and tenure across Northern Virginia, joined to ACS SNAP households at the tract level. 2,298 USDA FNS retailer records (1,044 active Feb 2026), 579-tract access layer, jurisdiction churn 2005-2025, DBSCAN clusters and IsolationForest churn anomalies, FGDC metadata and reproducibility manifest.Produced by the Keystone GIS Northern Virginia Autonomous GIS Research Program. Full methodology, interactive map, and FGDC metadata: https://keystonegis.com/datasets/nova-snap-retailers-day91.html