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2010 Census Block Groups


Download Link: http://data.nconemap.gov/downloads/vector/cenbg2010.zip
Abstract: The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the US 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 File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. 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. For example, Census 2000 tabulation blocks 3001, 3002, 3003,.., 3999 within Census 2000 tract 1210.02 are also within BG 3 within that census tract. Census 2000 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). The Census Bureau delineated BGs only where the PSAP participant declined to delineate BGs or where the Census Bureau could not identify any local PSAP participant. A BG usually covers a contiguous area. Each census tract contains at least one BG, and BGs are uniquely numbered within census tract. Within the standard census geographic hierarchy, BGs never cross county or census tract boundaries, but may cross the boundaries of other geographic entities like county subdivisions, places, urban areas, voting districts, congressional districts, and American Indian / Alaska Native / Native Hawaiian areas. BGs have a valid code range of 0 through 9. BGs coded 0 were intended to only include water area, no land area, and they are generally in territorial seas, coastal water, and Great Lakes water areas. For Census 2000, rather than extending a census tract boundary into the Great Lakes or out to the US nautical three-mile limit, the Census Bureau delineated some census tract boundaries along the shoreline or just offshore. The Census Bureau assigned a default census tract number of 0 and BG of 0 to these offshore, water-only areas not included in regularly numbered census tract areas.
Purpose: In order for others to use the information in the Census MAF/TIGER database in a geographic information system (GIS) or for other geographic applications, the Census Bureau releases to the public extracts of the database in the form of TIGER/Line Shapefiles.
Publication Date: 2010
Originator: US Department of Commerce, US Census Bureau, Geography Division
Online Linkage: http://www.nconemap.gov
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 201001
Ending Date: 201007
Currentness Reference: Publication Date
Status:
Progress: Complete
Maintenance and Update Frequency: TIGER/Line Shapefiles are extracted from the Census MAF/TIGER database. No changes or updates will be made to this version of the TIGER/Line Shapefiles. Future releases of TIGER/Line Shapefiles will reflect updates made to the Census MAF/TIGER database.
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -84.321869
East Bounding Coordinate: -75.400119
North Bounding Coordinate: 36.588157
South Bounding Coordinate: 33.752878
Contact Organization: US Department of Commerce, US Census Bureau, Geography Division, Geographic Products Branch
Contact Electronic Mail Address: geo.tiger@census.gov
Contact Voice Telephone: 301-763-1128
Contact Organization: US Department of Commerce, US Census Bureau, Geography Division, Geographic Products Branch
Grid Coordinate System Name: State Plane Coordinate System 1983
Horizontal Datum Name: North American Datum of 1983
Planar Distance Units: meters
Ellipsoid Name: Geodetic Reference System 1980
Attribute:
Attribute Label: STATEFP10
Attribute Definition: 2010 Census state Federal Information Processing Standards (FIPS) codes
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Codeset Domain:
Codeset Name: INCITS.38-200x (R2004), Codes for the Identification of the States, the District of Columbia, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 5-2)
Codeset Source: US Census Bureau
Attribute:
Attribute Label: COUNTYFP10
Attribute Definition: 2010 Census county Federal Information Processing Standards (FIPS) code
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Codeset Domain:
Codeset Name: INCITS.31-200x (R2007), Codes for the Identification of the Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 6-4)
Codeset Source: US Census Bureau
Attribute:
Attribute Label: TRACTCE10
Attribute Definition: 2010 Census census tract code
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 000000
Enumerated Domain Value Definition: Water tract in some coastal and Great Lakes water and territorial sea
Enumerated Domain Value Definition Source: US Census
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 000100 to 998999
Enumerated Domain Value Definition: Census tract number
Enumerated Domain Value Definition Source: US Census Bureau
Attribute:
Attribute Label: BLKGRPCE10
Attribute Definition: 2010 Census block group number
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 0
Enumerated Domain Value Definition: Water block group
Enumerated Domain Value Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 1 to 9
Enumerated Domain Value Definition: Census 2000 block group code
Enumerated Domain Value Definition Source: US Census Bureau
Attribute:
Attribute Label: GEOID10
Attribute Definition: Census block group identifier; a concatenation of 2010 Census state Federal Information Processing Standards (FIPS) code, county FIPS code, census tract code, and block group number
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Codeset Domain:
Codeset Name: INCITS.38-200x (R2004), Codes for the Identification of the States, the District of Columbia, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 5-2), INCITS.31-200x (R2007), Codes for the Identification of the Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 6-4) and the tract code that appears in TRACTCE10 and the census block group number that appears in BLKGRPCE10
Codeset Source: US Census Bureau
Attribute:
Attribute Label: NAMELSAD10
Attribute Definition: 2010 Census translated legal/statistical area description and the block group number
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Unrepresentable Domain: Refer to the block group number that appears in BLKGRPCE00 and translated legal/statistical area description code BG, Block Group
Attribute:
Attribute Label: MTFCC10
Attribute Definition: MAF/TIGER feature class code
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: G5030
Enumerated Domain Value Definition: Block Group
Enumerated Domain Value Definition Source: US Census Bureau
Attribute:
Attribute Label: FUNCSTAT10
Attribute Definition: 2010 Census functional status
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: S
Enumerated Domain Value Definition: Statistical entity
Enumerated Domain Value Definition Source: US Census Bureau
Attribute:
Attribute Label: ALAND10
Attribute Definition: 2010 Census land area (square meters)
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 0 to 9,999,999,999,999
Enumerated Domain Value Definition: Blank
Enumerated Domain Value Definition Source: US Census Bureau
Attribute:
Attribute Label: AWATER10
Attribute Definition: 2010 Census water area (square meters)
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 0 to 9,999,999,999,999
Enumerated Domain Value Definition: Blank
Enumerated Domain Value Definition Source: US Census Bureau
Attribute:
Attribute Label: INTPTLAT10
Attribute Definition: 2010 Census latitude of the internal point
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 00
Enumerated Domain Value Definition: Blank
Enumerated Domain Value Definition Source: US Census Bureau
Attribute:
Attribute Label: INTPTLON10
Attribute Definition: 2010 Census longitude of the internal point
Attribute Definition Source: US Census Bureau
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 00
Enumerated Domain Value Definition: Blank
Enumerated Domain Value Definition Source: US Census Bureau
Distribution Liability: NCCGIA is charged with the development and maintenance of NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop this dataset may be reflected in the data supplied. The user must be aware of possible conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this dataset without its current, compliant metadata record. The use of trade names or commercial products does not constitute their endorsement by NCCGIA or North Carolina State Government.
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