The main purposes of this online map are 1. to demonstrate the Web-Based Geographic Information System (GIS) in the District of Columbia Office of Tax and Revenue (OTR) Real Property Tax Administration (RPTA), and 2. to share detailed real property data and information to real property owners, the public, and other government entities. The rich map and interactive application include relevant real property valuation contributing map layers, links to original source agencies, and a variety of search, query, and analysis options to meet the needs of a wide user base. The location and links to the original DC Boundary Stones add a fun, historical,and educational component.The Office of the Chief Financial Officer, DC Office of Tax and Revenue (OTR), Real Property Assessment Division values all real property in the District of Columbia. The public interactive online DC Office of Tax and Revenue Real Property Assessment Lot Map Search application accompanies the OTR Tax Payer Service Center and may be used to search for and view all real property, related assessment areas, assessment data, and detailed assessment information.

This dataset was created by the DC Office of Planning and provides a simplified representation of the neighborhoods of the District of Columbia. These boundaries are used by the Office of Planning to determine appropriate locations for placement of neighborhood names on maps. They do not reflect detailed boundary information, do not necessarily include all commonly-used neighborhood designations, do not match planimetric centerlines, and do not necessarily match Neighborhood Cluster boundaries. There is no formal set of standards that describes which neighborhoods are represented or where boundaries are placed. These informal boundaries are not appropriate for display, calculation, or reporting. Their only appropriate use is to guide the placement of text labels for DC's neighborhoods. This is an informal product used for internal mapping purposes only. It should be considered draft, will be subject to change on an irregular basis, and is not intended for publication.

This map displays the National Park Service (NPS) jurisdictional boundaries in the District of Columbia (DC) overlaid with DC's Advisory Neighborhood Commission (ANC) and Single Member District (SMD) boundaries. It's intended purpose is to help people determine what ANC and/or SMD a particular park area is associated with.This web app uses the following DC datasets:Advisory Neighborhood Commissions from 2023 | Open Data DCSingle Member District from 2023 | Open Data DCMore information is available on the DC GIS website or the DC OpenData website.The NPS Land and Jurisdictional data layers represent the land under the jurisdiction of the NPS including which NPS administrative unit manages it. This boundary is equivalent to the type of boundary that is displayed on park brochure maps.These polygons do NOT represent the legal the boundary. For issues regarding land ownership and official boundaries, contact the National Capital Region Land Resources Program Center using the contact form.The National Capital Region NPS jurisdictional boundaries data is available on the National Capital Region NPS OpenData site, along with other NCR-specific NPS datasets. Visit the National Park Service OpenData site for more NPS data or the Integrated Resource Management Application (IRMA) Portal for NPS data, documents, and more.This web map is used in the NPS Land in DC and Advisory Neighborhood Commissions InstantApp (Item Details - NCR DC ANCs and NPS in DC Web App).

This data set describes Neighborhood Clusters that have been used for community planning and related purposes in the District of Columbia for many years. It does not represent boundaries of District of Columbia neighborhoods. Cluster boundaries were established in the early 2000s based on the professional judgment of the staff of the Office of Planning as reasonably descriptive units of the City for planning purposes. Once created, these boundaries have been maintained unchanged to facilitate comparisons over time, and have been used by many city agencies and outside analysts for this purpose. (The exception is that 7 “additional” areas were added to fill the gaps in the original dataset, which omitted areas without significant neighborhood character such as Rock Creek Park, the National Mall, and the Naval Observatory.) The District of Columbia does not have official neighborhood boundaries. The Office of Planning provides a separate data layer containing Neighborhood Labels that it uses to place neighborhood names on its maps. No formal set of standards describes which neighborhoods are included in that dataset.Whereas neighborhood boundaries can be subjective and fluid over time, these Neighborhood Clusters represent a stable set of boundaries that can be used to describe conditions within the District of Columbia over time.

Map of areas that will be in a new ANC when the 2023 ANC boundaries go into effect on January 1st, 2023.

This dataset is a digital hydrologic unit boundary layer for the District of Columbia only - to the watershed (10-digit) 6th level at 1:24,000 scale. It is a clipped version of the regional dataset using the DC Boundary. This data set consists of geo-referenced digital data and associated attributes created in accordance with the FGDC Proposal, Version 1.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 3/01/02 (https://www.nrcs.usda.gov). The hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. Polygons are attributed with hydrologic unit codes, names, downstream hydrologic unit, flow modifications, and hydrologic unit type for 4th level (8-digit) sub-basin, 5th level (10-digit) watershed, 6th level (12-digit) subwatershed, and acres for subwatershed.

U.S. Reservations are lands acquired for use by the Federal Government after the original founding of the city. These were all acquired by the Federal Government through purchase, condemnation, dedication or gift and almost all of the U.S. Reservations in Washington are under the Jurisdiction of the National Park Service. Unlike Appropriations, U.S. Reservations are found throughout the city. The National Park Service also has information for every U.S. Reservation and Appropriation in addition to DCRA Office of the Surveyor having some detailed information on transactional history. It should be noted that RPTA has converted some reservations to tax lots for land tracking purposes however the federal government still maintains ownership in many of these cases.

L'Enfant Plan of Washington. The dataset contains polygons representing the L'Enfant Plan historic district, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies. This district was identified from public records, including published maps and the National Register nomination form. It was created by buffering along the planimetric street centerline at specified distances, as referenced in the 1803 King Plats, ranging from 70 to 160 feet.

Proposed 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.

This downtown boundary was informed by prior defined boundaries of the District’s downtown including DC’s Comeback Plan, Urban Land Institute’s (ULI) Advisory Services Panel Report of the Central Business District Washington, D.C., Business Improvement Districts (BIDs), DC Department of Transportation’s (DDOT) Central Business District Boundary and central business activity. Geographically the area is 2 square miles, or approximately 3% of the District’s total land area. The Downtown boundary overlaps with Wards 2 and 6, and touches Advisory Neighborhood Commission boundaries 2A, 2B, 2C, 2F, 2G, 6C, and 6E.

The dataset contains polygons representing boundaries of District of Columbia 2022 election Wards. Boundaries include Census 2020 demographic data for population, age, race and housing. In the United States Census, Wards are the area name-Legal Statistical Area Description (LSAD) Term-Part Indicator for the District of Columbia.

Generalized Policy from the Comprehensive Plan Amendment Act of 2010, effective April 8, 2011.This data set is part of the Comprehensive Plan of the District of Columbia. It categorizes how different parts of the District may change by 2025. It highlights areas where more detailed Comprehensive Plan policies have been provided to manage this change. These policies may generally be found in the ten Area Elements. This dataset should be used to guide land use decision-making in conjunction with the Comprehensive Plan text, the Future Land Use Map, and other Comprehensive Plan maps. Boundaries within the dataset are to be interpreted in conjunction with these other resources in addition to the information shown here.

The DC Basemap provides a reference map for the District of Columbia projected in Web Mercator. Access the ArcGIS Rest endpoint. The basemap utilizes the most current planimetric and reference data available and represents the real world with foundation map layers derived from base data collection done in 2023.The service is provided by the Office of the Chief Technology Officer.

District of Columbia zoning map polygons established under the Zoning Regulations of 2016 (ZR16). ZR16 superseded the Zoning Regulations of 1958 (ZR58), effective 9/6/2016. ZR16 has been reorganized further pursuant to Zoning Commission Order 18-16/19-27/19-27A/19-27B (text and map amendment), effective 8/28/2023. ZR16 zoning polygons are updated based on Zoning Commission text and map amendments, when applicable. More information on zoning in DC, the Zoning Commission, or the zoning rules and regulations can be found at https://dcoz.dc.gov/page/structure-zoning-regulations-2016.

This application, HistoryQuest DC, is an interactive GIS map that provides historical data on approximately 193,000 extant buildings in Washington, D.C. The map offers several operational layers of information for the user including historic data on individual buildings and historic districts, links to documentation on properties listed in the National Register of Historic Places, information on historic residential subdivisions, and the identification and boundaries of the L’Enfant Plan, and the city’s Squares, and Wards. The featured layer in the map—the Historical Data on DC Buildings—provides information from a variety of sources on original dates of construction, architects, owners and builders of the city’s historic buildings. The application also includes a Query tool that allows the user to analyze the historic data within a specified geographic area or city-wide.This application has evolved out of the DC Historical Building Permits Database, begun in 2002, is on-going. Requests to correct or add new information can be made using the “Propose Data Change” drop-down form located on the banner at the top of the map. For questions or concerns, contact the Historic Preservation Office at historic.preservation@dc.gov.

Household type, Education, Disability, Language, Computer/Internet Use, and more. This service is updated annually with American Community Survey (ACS) 5-year data. Contact: District of Columbia, Office of Planning. Email: planning@dc.gov. Geography: Census Tracts. Current Vintage: 2019-2023. ACS Table(s): DP02. Data downloaded from: Census Bureau's API for American Community Survey. Date of API call: January 2, 2025. National Figures: data.census.gov. Please cite the Census and ACS when using this data. Data Note from the Census: Data are based on a sample and are subject to sampling variability. The degree of uncertainty for an estimate arising from sampling variability is represented through the use of a margin of error. The value shown here is the 90 percent margin of error. The margin of error can be interpreted as providing a 90 percent probability that the interval defined by the estimate minus the margin of error and the estimate plus the margin of error (the lower and upper confidence bounds) contains the true value. In addition to sampling variability, the ACS estimates are subject to nonsampling error (for a discussion of nonsampling variability, see Accuracy of the Data). The effect of nonsampling error is not represented in these tables. Data Processing Notes: This layer is updated automatically when the most current vintage of ACS data is released each year, usually in December. The layer always contains the latest available ACS 5-year estimates. It is updated annually within days of the Census Bureau's release schedule. Boundaries come from the US Census TIGER geodatabases. Boundaries are updated at the same time as the data updates (annually), and the boundary vintage appropriately matches the data vintage as specified by the Census. These are Census boundaries with water and/or coastlines clipped for cartographic purposes. For census tracts, the water cutouts are derived from a subset of the 2020 AWATER (Area Water) boundaries offered by TIGER. For state and county boundaries, the water and coastlines are derived from the coastlines of the 500k TIGER Cartographic Boundary Shapefiles. The original AWATER and ALAND fields are still available as attributes within the data table (units are square meters). Field alias names were created based on the Table Shells file available from the American Community Survey Summary File Documentation page. Data processed using R statistical package and ArcGIS Desktop. Margin of Error was not included in this layer but is available from the Census Bureau. Contact the Office of Planning for more information about obtaining Margin of Error values.

This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). The National Wetlands Inventory - Version 2, Surface Waters and Wetlands Inventory was derived by retaining the wetland and deepwater polygons that compose the NWI digital wetlands spatial data layer and reintroducing any linear wetland or surface water features that were orphaned from the original NWI hard copy maps by converting them to narrow polygonal features. Additionally, the data are supplemented with hydrography data, buffered to become polygonal features, as a secondary source for any single-line stream features not mapped by the NWI and to complete segmented connections. Wetland mapping conducted in WA, OR, CA, NV and ID after 2012 and most other projects mapped after 2015 were mapped to include all surface water features and are not derived data. The linear hydrography dataset used to derive Version 2 was the U.S. Geological Survey's National Hydrography Dataset (NHD). Specific information on the NHD version used to derive Version 2 and where Version 2 was mapped can be found in the 'comments' field of the Wetlands_Project_Metadata feature class. Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of "farmed wetlands" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps. This dataset should be used in conjunction with the Wetlands_Project_Metadata layer, which contains project specific wetlands mapping procedures and information on dates, scales and emulsion of imagery used to map the wetlands within specific project boundaries.

This map shows the National Park Service (NPS) jurisdictional boundaries in the District of Columbia symbolized by the six administrative NPS administrative units: Chesapeake & Ohio Canal National Historical Park, George Washington Memorial Parkway, National Capital Parks-East, National Mall and Memorial Parks, Rock Creek Park, and White House and President's Park.This web map is used by the InstantApp NCR NPS Land in DC by Administrative Unit Web App.The NPS Land and Jurisdictional data layers represent the land under the jurisdiction of the NPS including which NPS administrative unit manages it. This boundary is equivalent to the type of boundary that is displayed on park brochure maps.These polygons do NOT represent the legal the boundary. For issues regarding land ownership and official boundaries, contact the National Capital Region Land Resources Program Center using the contact form.The National Capital Region NPS jurisdictional boundaries data is available on the National Capital Region NPS OpenData site, along with other NCR-specific NPS datasets. Visit the National Park Service OpenData site for more NPS data or the Integrated Resource Management Application (IRMA) Portal for NPS data, documents, and more.

Proposed boundary of the seat of the Government of the United States, to be known as the "Capital". This territory is delineated in legislation to create the State of Washington DC passed by the US House of Representatives on June 26, 2020.The dataset contains locations and attributes of Federal District boundary, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies.

The DC Main Streets commercial corridors were created for Department of Small and Local Business Development. The GIS layer represents the locations of neighborhood commercial districts comprised of specific streets designated by DSLBD as "Main Streets." DC Main Streets is a program through which the District government works with neighborhood organizations to revitalize the District's neighborhood business districts through a comprehensive and systemic strategy for business retention and attraction, commercial property improvements, and provision of coordinated corridor-wide services.