Description: 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. Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census.
Description: Block Groups (BGs) are defined before tabulation block delineation and numbering, but are clusters of blocks within the same census tract that have the same first digit of their 4-digit census block number from the same decennial census. Census 2020 BGs generally contained between 600 and 3,000 people, with an optimum size of 1,500 people. Most BGs were delineated by local participants in the Census Bureau's Participant Statistical Areas Program (PSAP).
Description: The primary purpose of census tracts is to provide a stable set of geographic units for the presentation of census data and comparison back to previous decennial censuses. Census tracts generally have a population size between 1,200 and 8,000 people, with an optimum size of 4,000 people. When first delineated, census tracts were designed to be homogeneous with respect to population characteristics, economic status, and living conditions. Census tract boundaries generally follow visible and identifiable features. State and county boundaries always are census tract boundaries in the standard census geographic hierarchy. In a few rare instances, a census tract may consist of non-contiguous areas.
Description: The units of geography used for the 2020 Census maps displayed here are the Zip Code Tabulation Area (ZCTA). ZCTAs are statistical geographic areas produced by the Census Bureau by aggregating census blocks to create generalized areas closely resembling the U.S. Postal Service's postal zip codes.
Description: For the 2020 Census, an urban area will comprise a densely developed core of census blocks that meet minimum housing unit density requirements, along with adjacent territory containing non-residential urban land uses as well as other lower density territory included to link outlying densely settled territory with the densely settled core. To qualify as an urban area, theterritory identified according to the criteria must encompass at least 2,000 housing units or at least 5,000 persons.Fields include: UACE20 5 String 2020 Census urban area code GEOID20 5 String 2020 Census urban area identifier; 2020 Census urban area code NAME20 100 String 2020 Census urban area name NAMELSAD20 100 String 2020 Census name and the translated legal/statistical area description for urban area LSAD20 2 String 2020 Census legal/statistical area description code for urban area MTFCC20 5 String MAF/TIGER Feature Class Code (G3500) UATYP20 1 String 2020 Census urban area type FUNCSTAT20 1 String 2020 Census functional status ALAND20 14 Number 2020 Census land area AWATER20 14 Number 2020 Census water area INTPTLAT20 11 String 2020 Census latitude of the internal point INTPTLON20 12 String 2020 Census longitude of the internal pointhttps://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp_rd18/TGRSHPRD18_TechDoc.pdf
Copyright Text: United States Census Bureau TIGER/Line Shapefiles,MDiMap, MDP, Alfred Sundara,alfred.sundara@maryland.gov
Name: Census Designated and Incorporated Places 2020
Display Field: NAME
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The TIGER/Line Files include both incorporated places (legal entities) and census designated places or CDPs (statistical entities). An incorporated place is established to provide governmental functions for a concentration of people as opposed to a minor civil division (MCD), which generally is created to provide services or administer an area without regard, necessarily, to population. Places always nest within a State, but may extend across county and county subdivision boundaries. An incorporated place usually is a city, town, village, or borough, but can have other legal descriptions. CDPs are delineated for the decennial census as the statistical counterparts of incorporated places. CDPs are delineated to provide data for settled concentrations of population that are identifiable by name, but are not legally incorporated under the laws of the State in which they are located. The boundaries for CDPs often are defined in partnership with State, local, and/or tribal officials and usually coincide with visible features or the boundary of an adjacent incorporated place or another legal entity. CDP boundaries often change from one decennial census to the next with changes in the settlement pattern and development; a CDP with the same name as in an earlier census does not necessarily have the same boundary. The only population/housing size requirement for CDPs for the 2010 Census is that they must contain some housing and population. The boundaries of all 2020 Census incorporated places are as of January 1, 2020 as reported through the Census Bureau's Boundary and Annexation Survey (BAS). The boundaries of all 2020 Census CDPs were delineated as part of the Census Bureau's Participant Statistical Areas Program (PSAP).STATEFP 2 String State FIPS codeCONCTYFP 5 String Consolidated city FIPS codeCONCTYNS 8 String Consolidated city GNIS codeGEOID 7 String Consolidated city identifier; a concatenation of current state FIPS code and consolidated city FIPS codeNAME 100 String Consolidated city nameNAMELSAD 100 String Name and the translated legal/statistical area description for consolidated cityLSAD 2 String Legal/statistical area description code for consolidated cityCLASSFP 2 String FIPS class codeMTFCC 5 String MAF/TIGER Feature Class Code (G4120)FUNCSTAT 1 String Functional statusALAND 14 Number Land areaAWATER 14 Number Water areaINTPTLAT 11 String Latitude of the internal pointINTPTLON 12 String Longitude of the internal poinhttps://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp_rd18/TGRSHPRD18_TechDoc.pdf
Copyright Text: United States Census Bureau, MD iMap, Maryland, MD, BNDY, Boundaries, MDP, Maryland Department of Planning, Planning, Maryland Urban Areas