Zoning regulations in the U.S. exist as fragmented legal documents and inconsistent maps, making it difficult to analyze land-use constraints, housing capacity, and infrastructure planning at regional and national scales. The lack of standardized geospatial zoning data limits evidence-based planning and policy evaluation. Reviewed municipal zoning codes, planning documents, and official zoning maps to extract regulatory characteristics for zoning districts. Digitized and structured zoning information into standardized geospatial datasets using GIS. Created and corrected zoning district geometries, attribute tables, and metadata fields to ensure spatial accuracy, regulatory consistency, and integration into the National Zoning Atlas database.