D.C. Office of the Chief Technology OfficerProposed boundaries of the State of Washington DC and Federal District as approved by DC Council on October 18, 2016. Read the complete testimony from the DC Office of Planning at: Office of Planning Proposed New Columbia Boundaries. A revised version of this boundary was created by legislation passed by the US House of Representatives in 2020.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/a28e94c1058c4b98b46f85a6bcccdb3e_48engOpen Data DCPublicState of Washington DC in 2016 [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of Columbia2016