The Regional Land Information System (RLIS) is a GIS dataset from Oregon Metro, the elected regional government for the Portland metropolitan area. RLIS delivers more than 100 GIS map layers for the region.
Oregon Metro exposes the RLIS data through a RESTful API intended for regional developers in need of geocoding functionality or data describing a given address. The API has two modes: locate and query. Accepted input types include addresses, intersections, POIs, taxlot IDs, zipcodes, and coordinates. The API returns JSON or XML formatted responses.