Look up zoning classification for a parcel using a municipal GIS API

Steps

1. Geocode the property address to obtain latitude/longitude coordinates.
2. Identify whether the municipality publishes a zoning GIS layer via ArcGIS REST API or another OGC-compliant service; many US cities publish this on their open data portals.
3. Query the zoning layer using a spatial identify or intersect operation, passing the parcel's centroid coordinates to retrieve the intersecting zoning polygon's attributes.
4. Parse the zoning district code (e.g., R-1, C-2, M-I) and description from the response attributes.
5. Cross-reference the zoning code against the municipality's published zoning ordinance or a lookup table to determine permitted uses, density limits, height limits, and setback requirements.
6. Cache the zoning result by parcel ID with a long TTL (30–90 days); zoning changes are infrequent but significant — consider subscribing to municipal zoning amendment notifications for cache invalidation.