For a city, street blocks are a very common way in which to organize and relate work (e.g. 'I need to fix a pothole on the 1600 Block of Pennsylvania Ave'). Although driveways or alleys may intersect streets, this representation requires that the segment remain unbroken. Road types include streets. Previously Called Street Segments. Note that there are no from/to address fields. We will not be maintaining them in our data. There also will be no generating a 'streetname' list.For more information please visit DDOT's wiki page.

Census blocks are statistical areas bounded on all sides by visible features (e.g., streets, roads, streams, and railroad tracks), and by non-visible boundaries (e.g., city, town, township, county limits, and short line-of-sight extensions of streets and roads). Generally, census blocks are small in area (e.g., a block in a city). Census blocks in suburban and rural areas may be large, irregular, and bounded by a variety of features (e.g., roads, streams, and/or transmission line rights-of-way). In remote areas, census blocks may encompass hundreds of square miles. Census blocks cover all territory in the United States, Puerto Rico, and the Island areas. Blocks do not cross the boundaries of any entity for which the Census Bureau tabulates data.Census Block Numbers—Census blocks are numbered uniquely within the boundaries of each state, county, census tract with a 4-character census block number. The first character of the tabulation block number identifies the block group. A block number can only be unique by using the decennial census state (STATEFP

See where community members and organizations have adopted blocks. Search by address, group name or by using the map controls. Click the block lines to see how has adopted the block.The program helps beautify neighborhoods and allows citizens and families to take an active role in cleaning and greening the District. Adopt-A-Block offers a hands-on project for people and organizations to participate in making a noticeable contribution to their communities.For more information, please visit the Adopt a Block website.

The Clean City's Adopt-A-Block Program helps beautify neighborhoods and allows citizens and families to take an active role in cleaning and greening the District. As a part of the Clean City Initiative, Adopt-A-Block offers a hands-on project for people and organizations. The program allows participants to make a noticeable contribution to their communities. For more information, please visit https://communityaffairs.dc.gov/mocc

The Pedestrian Friendliness Index (PFI) scores for each Census block showing how walkable they are, relative to other Census blocks in the District. An area deemed ‘most walkable’ has a connected street grid with sidewalks, buildings set close to the street, and intersections and blocks that are manageable for pedestrians.

This layer is a component of Demographic_WebMercator.

Provided by the Office of the Chief Technology Officer

© DC GIS

Census Blocks from 2020. Redistricting Data (P.L. 94-171).Contact: District of Columbia, Office of Planning. Email: planning@dc.govGeography: Census BlocksCurrent Vintage: 2020P.L. 94-171 Table(s): P1. Race; P2. Hispanic or Latino, and Not Hispanic or Latino by Race; P3. Race for the Population 18 Years and Over; P4. Hispanic or Latino, and Not Hispanic or Latino by Race for the Population 18 Years and Over; P5. Group Quarters Population by Major Group Quarters Type; H1. Housing Occupancy StatusData downloaded from: https://www.census.gov/programs-surveys/decennial-census/about/rdo/summary-files.htmlNational Figures: data.census.govPublic Law 94-171, enacted in 1975, directs the U.S. Census Bureau to make special preparations to provide redistricting data needed by the 50 states.1 It specifies that within 1 year following Census Day, the Census Bureau must send the governor and legislative leadership in each state the data they need to redraw districts for the U.S. Congress and state legislatures. To meet this legal requirement, the Census Bureau set up a program that affords state officials an opportunity before each decennial census to define the small areas for which they wish to receive census population totals for redistricting purposes. Officials may receive data for voting districts (e.g., election precincts, wards) and state house and senate districts, in addition to standard census geographic areas such as counties, cities, census tracts, and blocks. State participation in defining areas is voluntary and nonpartisan. For further information on Public Law 94-171 and the 2020 Census Redistricting Data Program, see:www.census.gov/programs-surveys/decennial-census/about/rdo/program -management.htmlData processed using R statistical package and ArcGIS Desktop.

After a clean up event by our block adopters, event organizers record their clean up data. This includes items such as how many trash bags were used. The number of volunteers that joined. By sharing this information the Office of Clean city can better engage with all communities. This layer is used in the Group Spotlights section of the Adopt a Block hub site, https://adopt-a-block-dcgis.hub.arcgis.com/.

The dataset contains locations and attributes of blocks, created as part of the Master Address Repository (MAR) for the Office of the Chief Technology Officer (OCTO) and participating DC government agencies. The blocks used street centerlines information from DDOT. Blocks include named alleys in DC (such as 'WALTER ALLEY NE'). A block represents a street segment which usually has two bordering streets. The coordinates for the blocks are located at the midpoint of the street segment. More information on the MAR can be found at https://opendata.dc.gov/pages/addressing-in-dc. The data dictionary is available: https://opendata.dc.gov/documents/2a4b3d59aade43188b6d18e3811f4fd3/explore. In the MAR 2, the BlocksPt is called BLOCKS_PT and is primarily based off of street data from DC Department of Transportation's Roads & Highways database, it also features additional useful information such as created date, last edited date, begin date, and more.

These data represent Census Block Groups 2010 in Washington, DC. Urban tree canopy (UTC) and possible planting area (PPA) metrics have been calculated for Census Block Groups 2010 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).

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Residents, businesses, and the government all play a role in keeping DC clean, safe, and healthy. Only by involving all residents and each community can we create a #TrashFreeDC. Success begins with one neighbor and one community deciding to make a difference. Anyone can participate in the Adopt a Block program - individuals, families, churches, businesses, schools and other groups and organizations. Adopting a block in the District of Columbia has many benefits:Improved quality of life in your neighborhood. The appearance of our community contributes to the quality of life we all share.Signs with your group's name letting people know you are committed to making a difference.Meet your neighbors, strengthen your community connections, and build leadership skills. Become a role model to youth.More active communities help discourage rodents and unwanted and illegal activity.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (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. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Census blocks are relatively small in area; for example, a block in a city bounded by streets. However, census blocks in remote areas are often large and irregular and may even be many square miles in area. A common misunderstanding is that data users think census blocks are used geographically to build all other census geographic areas, rather all other census geographic areas are updated and then used as the primary constraints, along with roads and water features, to delineate the tabulation blocks. As a result, all 2020 Census blocks nest within every other 2020 Census geographic area, so that Census Bureau statistical data can be tabulated at the block level and aggregated up to the appropriate geographic areas. Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces.

Roadway Street Blocks representing Interstates, Freeways, Expressways in the District, This data set was created to act as a basis for public and private institutions to improve their policy and decision making; promote economic development; and enhance the quality of life for residents and businesses. For more information please visit DDOT's wiki page.

Unofficial Census block group boundaries for the District of Columbia. These boundaries were compiled from an unofficial U.S. Census TIGER/line product that reflects updates to the original TIGER boundaries based on planimetric data supplied by the District of Columbia. This product is generally consistent with District of Columbia planimetric data, although boundary geometries are not identical, and often vary by 5 to 10 centimeters.

The TIGER/Line Shapefiles are an extract of selected geographic and cartographic information from the Census MAF/TIGER database. The Census MAF/TIGER database 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 the shapefiles can be combined to cover the whole nation.

Census_Block

For a city, street blocks are a very common way in which to organize and relate asset types such as bicycle lanes. The bicycle lane layer is an extract of its parent layer Roadway Blocks. The bicycle lane layer provides locations for a variety of different types of lane types throughout Washington, DC. Bicycle lane dataset is derived from the Roadway Block centerlines.

Census_Block_Group

Roads and Highways manages intersections, however they are not singular points; RH creates a series of points - one for each intersecting road at that intersection. For DDOT, it is more useful to have a single intersection point representing the intersection. Through a custom DDOT script,the series of intersection points is reduced into a single representative point.For more information please visit DDOT's wiki page