ZIP codes are a bad spatial abstraction
ZIP codes are delivery routes, not polygons. See how SkaldMaps combines ACS and other sources using ZCTAs, HUD-USPS crosswalks, spatial joins, and DuckDB.
SkaldMaps Blog
Notes on location data, geospatial analysis, real estate research, and building SkaldMaps.
Latest posts
Building confidence in geospatial data
How SkaldMaps generates a confidence score for data attributes that helps you gauge how accurate data is (or isn't).