Presented at State of the Map US 2012: "How Code for America Makes Maps". Live demos were GeoData Checkout and NeighborDiff, both available on Github: https://github.com/codeforamerica/geodata-checkout and https://github.com/codeforamerica/NeighborDiff Neo4j network map code at https://github.com/codeforamerica/DemoDexter