District of Columbia boundary. The dataset is a polygon representing the District of Columbia 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 boundary was identified from public records and heads-up digitized using a combination of the 1995 orthophotographs, planimetric roads features, and the USGS digital raster graphic quad sheets, and 1999 planimetrics for the Potomac River boundary.Also see the District's Boundary Stone markers.

The dataset contains locations and attributes of DC Boundary stones. A database provided by A. Morton Thomas & Associates, Inc. identified DC Boundary stone locations. DC Boundary stones field surveyed by GPS and conventional survey methods. Surveyed accuracy is +/- 5cm horizontal and +/- 9cm vertical.STONES North, NE1, NE8, East, SE1, SE9, SW5, West, NW1, NW2, NW4, NW5, NW9 = Field Survey Method: Conventional - 2 survey control points were set at the site utilizing GPS-RTK. Conventional survey total station was then utilized to data collect angle and distance measurements to the stone. The Stone was located at the top center point for both upright and leaning conditions. 3 color digital photos were obtained for the stone. A measure down was obtained from the top of stone to the ground. STONES NE2, NE3, NE4, NE5, NE6, NE7, NE9, SE2, SE3, SE5, SE6, SE7, SE8, SW1, SW2, SW3, SW4, SW6, SW7, SW8, SW9, NW3, NW7, NW 8 = Field Survey Method: GPS-RTK A minimum of 3 consecutive GPS-RTK observations were made with each observation being a minimum of 30 seconds in length with data collected at 1 second intervals. The observations were averaged to produce the resulting coordinates and data was reviewed to confirm project accuracies were met. The Stone was located at the top center point for both upright and leaning conditions. 3 color digital photos were obtained for the stone. A measure down was obtained from the top of stone to the ground. STONE SE4 = No survey worked performed. Stone is located in private residence waiting to be reset by joint survey society effort. No plans at this time for resetting STONE South = Could not survey due to site being under construction with stone wrapped in burlap and packed in sand. Approximate coordinates (+/- 0.4') obtained from AMT surveyor working for PCC at Woodrow Wilson Bridge

The Washington DC boundary was created by connecting all of the boundary stone locations into a single polygon.

All DC Public School students eligible for grades K-12 have a guaranteed right to enroll in their in-boundary school. EdBoundary Widget finds schools assigned to a particular address based on the approved DCPS attendance boundaries. You may have an additional assigned school for the next grade level based on the school you currently attend. You can visit https://www.myschooldc.org/ for more information.

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.

This polygon shapefile contains United States county boundaries with political limits extracted from the U.S. Census Bureau's MAF/TIGER Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The primary legal divisions of most states are termed counties. In Louisiana, these divisions are known as parishes. In Alaska, which has no counties, the equivalent entities are the organized boroughs, city and boroughs, and municipalities, and for the unorganized area, census areas. The latter are delineated cooperatively for statistical purposes by the State of Alaska and the Census Bureau. In four States (Maryland, Missouri, Nevada, and Virginia), there are one or more incorporated places that are independent of any county organization and thus constitute primary divisions of their States. These incorporated places are known as independent cities and are treated as equivalent entities for purposes of data presentation. The District of Columbia and Guam have no primary divisions, and each area is considered an equivalent entity for purposes of data presentation. The Census Bureau treats the following entities as equivalents of counties for purposes of data presentation: Municipios in Puerto Rico, Districts and Islands in American Samoa, Municipalities in the Commonwealth of the Northern Mariana Islands, and Islands in the United States Virgin Islands. The entire area of the United States, Puerto Rico and the Island Areas is covered by counties or equivalent entities. The 2010 Census boundaries for counties and equivalent entities are as of January 1, 2010, primarily as reported through the Census Bureau's Boundary and Annexation Survey (BAS). This layer is part of the 2014 National Transportation Atlas Database.

This EnviroAtlas dataset shows the Washington, DC EnviroAtlas community boundary. It represents the outside edge of all the block groups included in the EnviroAtlas Community. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

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 National Transportation Atlas Databases 2014 (NTAD2014) is a set of nationwide geographic datasets of transportation facilities, transportation networks, associated infrastructure and other political and administrative entities. These datasets include spatial information for transportation modal networks and intermodal terminals, as well as the re¬lated attribute information for these features. This data supports research, analysis, and decision-making across all transportation modes. It is most useful at the national level, but has major applications at regional, state and local scales throughout the transportation community. The data used to compile NTAD2014 was provided by our partners within the United States Department of Transportation (USDOT) and by other agencies throughout the United States Federal Government. These contributors are the actual data stewards and are ultimately responsible for the maintenance and accuracy of their data. The Census Bureau designates a new list of Urbanized Areas (UZAs) every 10 years, following the conclusion of each decennial census. The designation of UZAs by the U.S. Census Bureau has significant implications for the metropolitan planning process. Federal transportation legislation requires that a Metropolitan Planning Organization (MPO) be designated for each urbanized area with a population of more than 50,000 people in order to carry out the metropolitan transportation planning process, as a condition of Federal aid. This data provides users with information about the locations, names and sizes of Metropolitan Planning Organizations and is intended for use primarily with national planning applications.

Shipstead-Luce Act boundary as delineated in a hardcopy map dated 1959.

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 and US Census 2010 Tract, Blockgroup, and Block map layers. 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.

Proposed boundaries of the State of Washington DC and Federal District as approved by DC Council on October 18, 2016. A revised version of this boundary was created by legislation passed by the US House of Representatives in 2020. The dataset contains locations and attributes of Federal District boundary.

These data represent DC Boundary in Washington, DC. Urban tree canopy (UTC) and possible planting area (PPA) metrics have been calculated for DC Boundary within the study area. UTC results provided in vector format with attribute fields (area/percent metrics/percent change metrics) for each land cover class and UTC type (UTC, PPA, Unsuitable UTC, UTC Change).

This dataset contains polygons that represent the boundaries of statistical neighborhoods as defined by the DC Department of Health (DC Health). DC Health delineates statistical neighborhoods to facilitate small-area analyses and visualization of health, economic, social, and other indicators to display and uncover disparate outcomes among populations across the city. The neighborhoods are also used to determine eligibility for some health services programs and support research by various entities within and outside of government. DC Health Planning Neighborhood boundaries follow census tract 2010 lines defined by the US Census Bureau. Each neighborhood is a group of between one and seven different, contiguous census tracts. This allows for easier comparison to Census data and calculation of rates per population (including estimates from the American Community Survey and Annual Population Estimates). These do not reflect precise neighborhood locations and do not necessarily include all commonly-used neighborhood designations. There is no formal set of standards that describes which neighborhoods are included in this dataset. Note that the District of Columbia does not have official neighborhood boundaries. Origin of boundaries: each neighborhood is a group of between one and seven different, contiguous census tracts. They were originally determined in 2015 as part of an analytical research project with technical assistance from the Centers for Disease Control and Prevention (CDC) and the Council for State and Territorial Epidemiologists (CSTE) to define small area estimates of life expectancy. Census tracts were grouped roughly following the Office of Planning Neighborhood Cluster boundaries, where possible, and were made just large enough to achieve standard errors of less than 2 for each neighborhood's calculation of life expectancy. The resulting neighborhoods were used in the DC Health Equity Report (2018) with updated names. HPNs were modified slightly in 2019, incorporating one census tract that was consistently suppressed due to low numbers into a neighboring HPN (Lincoln Park incorporated into Capitol Hill). Demographic information were analyzed to identify the bordering group with the most similarities to the single census tract. A second change split a neighborhood (GWU/National Mall) into two to facilitate separate analysis.

The interactive zoning map allows users to determine the zoning classification for any property in the District. Users can search zoning by specific address, square and lot, parcel, Zoning Commission (ZC) case, or Planned Unit Development (PUD), where applicable. Users can select different layers of data to display on the map, and can print reports for any selected property. Users should note that when searching for a PUD, the ZC case name and ZC case number reflect the most recent case name and case number associated with the PUD. If you have questions, comments, or suggestions regarding the zoning map, contact the Office of Zoning at (202) 727-6311 or dcoz@dc.gov.

The Washington DC Area geologic map database (DCDB) provides geologic map information of areas to the NW, W, and SW of Washington, DC to various professionals and private citizens who have uses for geologic data. Digital, geographically referenced, geologic data is more versatile than traditional hard copy maps, and facilitates the examination of relationships between numerous aspects of the geology and other types of data such as: land-use data, vegetation characteristics, surface water flow and chemistry, and various types of remotely sensed images. The DCDB was created by combining Arc/Info coverages, designing a Microsoft (MS) Access database, and populating this database. Proposed improvements to the DCDB include the addition of more geochemical, structural, and hydrologic data.

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.

State boundaries for Pennsylvania, New Jersey, Delaware, Maryland, New York, Connecticut, and Washington DC. This dataset was compiled from multiple sources. Original Sources: PA - PennDOT NJ - NJOIT DE - DE Geological Survey MD, NY, CT, DC - ESRI Linework has been adjusted using the following methodology. NJ's boundaries overrode PA, since NJ's were highly accurate. PA overrode MD since PennDOT's were more accurate than ESRI's, and DE overrode PA & MD, since the "arc" of northernmost DE was a bit more accurate than PennDOT's or our original county boundaries. Boundaries in the DVRPC region have been adjusted to align with parcel data (where appropriate). This file is the result of a dissolve performed on the county boundary file.

Commission of Fine Arts Boundaries. Identifies the region of the District of Columbia wherein the Federal Commission on Fine Arts has jurisdiction. The data source is the Commission of Fine Arts Jurisdiction document, developed August 1997, that contains a listing of all property squares. Depending upon the scope (i.e. a new building, major or minor alterations), a proposed project in areas defined in the Shipstead-Luce Act will be reviewed by the Commission of Fine Arts or by Commission staff. Staff reviews of smaller scale projects are compiled into an Appendix, which is submitted to the Commission members at each monthly meeting.