City of Ann ArborTo delineate the polygon boundary of the City of Ann Arbor Downtown Development Area (DDA). Polygon comes from the original legal description adopted by City Council. It can and will be adjusted as the City Council makes any changes to the legal description via resolution.dda-boundaryengAnn Arbor Data CatalogPublicPlanningDDA BoundaryDatasetsMichigan--Ann ArborMichiganLast Modified: 2026-05-10