Chicago Metropolitan Agency for PlanningCMAP Zones are units of geography that are used in the transportation modeling activities of CMAP. Zones are mostly derived from quarter sections, unless the zone falls outside the CMAP planning area. This latest edition of the Zones (Zone09) contains no major differences with the 2007 Zones (Zone07).ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/ac458aa302f14469a7b963bbbea91959_0engCMAP (Chicago Metropolitan Agency for Planning) Data HubPublicTrip Generation Zones - Zones (2009) [Illinois--Chicago]Web servicesIllinois--ChicagoIllinois2009