Torrance County 2010 Census Block Groups
Metadata from the RGIS Metadata Repository
Identification Information
- Title Torrance County 2010 Census Block Groups
- Date 2011-06-06
- Date Type Publication
- Cited Responsible Party
-
- Organization Name U.S. Department of Commerce, U.S. Census Bureau, Geography Division
- Role identify
- Presentation Form vector digital data
- Abstract The TIGER/Line Files are shapefiles and related database files (.dbf) that 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 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 U.S. 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.
- Status Complete
- Point of Contact
-
- Individual Name
- Organization Name Earth Data Analysis Center
- Position Name RGIS Clearinghouse Manager
- Role Point of contact
- Voice (505) 277-3622
- Facsimile (505) 277-3614
- Address
-
- Delivery Point MSC01 1110
- Delivery Point 1 University of New Mexico
- City Albuquerque
- Administrative Area NM
- Postal Code 87131-0001
- Country USA
- Electronic Mail Address clearinghouse@edac.unm.edu
- 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.
- Descriptive Keywords County or equivalent entity, Polygon, Block Group, BG
- Access Constraints None
- Use Constraints The TIGER/Line Shapefile products are not copyrighted however TIGER/Line and Census TIGER are registered trademarks of the
U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to
the U.S. Census Bureau as the source.
The boundary information in the TIGER/Line Shapefiles are for statistical data collection and tabulation purposes only; their
depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights
of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER/Line shapefiles have six implied
decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest.
- Language English
- Topic Category boundaries
- Extent
-
- Geographic Bounding Box
-
- West Bound -106.471074
- East Bound -105.29012
- North Bound 35.042179
- South Bound 34.259672
- Temporal Extent
-
- Beginning Position 2010-01
- Ending Position 2010-07
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Distribution Information
- Distributor
-
- Individual Name
- Organization Name Earth Data Analysis Center
- Position Name Clearinghouse Manager
- Role Point of contact
- Voice 505-277-3622 ext. 230
- Facsimile 505-277-3614
- Address
-
- Delivery Point MSC01 1110
- Delivery Point 1 University of New Mexico
- City Albuquerque
- Administrative Area NM
- Postal Code 87131-0001
- Country USA
- Electronic Mail Address clearinghouse@edac.unm.edu
- Transfer Options
-
- Online Resource ZIP
- Online Resource ESRI Shapefile (shp)
- Online Resource GML
- Online Resource KML
- Online Resource GeoJSON
- Online Resource JSON
- Online Resource Comma Separated Values (csv)
- Online Resource MS Excel format (xls)
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Spatial Reference Information
- Spatial References
-
- Spatial Reference North American Datum of 1983 in the 48 contiguous states, the District of Columbia, Alaska, Hawaii, Puerto Rico, the Virgin
Islands of the United States, and the Pacific Island Areas.
-
- Online Reference EPSG:4269
- Spatial Reference Geodetic Reference System 80
-
- Online Reference EPSG:7019
- Indirect Spatial Reference Socorro County (35053)
- Geometric Object Type G-polygon
- Geometric Object Count 11
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Data Quality Information
- Attribute Accuracy Report
-
- Report Accurate against Federal Information Processing Standards (FIPS), FIPS Publication 6-4, and FIPS-55 at the 100% level for
the codes and base names. The remaining attribute information has been examined but has not been fully tested for accuracy.
- Quantitative Attribute Accuracy Assessment
-
- Attribute Accuracy Value
- Attribute Accuracy Explanation
- Logical Consistency Report The Census Bureau performed automated tests to ensure logical consistency and limits of shapefiles. Segments making up the
outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. All polygons are tested for closure.
The Census Bureau uses its internally developed geographic update system to enhance and modify spatial and attribute data
in the Census MAF/TIGER database. Standard geographic codes, such as FIPS codes for states, counties, municipalities, county
subdivisions, places, American Indian/Alaska Native/Native Hawaiian areas, and congressional districts are used when encoding
spatial entities. The Census Bureau performed spatial data tests for logical consistency of the codes during the compilation
of the original Census MAF/TIGER database files. Most of the codes for geographic entities except states, counties, urban
areas, Core Based Statistical Areas (CBSAs), American Indian Areas (AIAs), and congressional districts were provided to the
Census Bureau by the USGS, the agency responsible for maintaining FIPS 55. Feature attribute information has been examined
but has not been fully tested for consistency.
For the TIGER/Line Shapefiles, the Point and Vector Object Count for the G-polygon SDTS Point and Vector Object Type reflects
the number of records in the shapefile attribute table. For multi-polygon features, only one attribute record exists for
each multi-polygon rather than one attribute record per individual G-polygon component of the multi-polygon feature. TIGER/Line
Shapefile multi-polygons are an exception to the G-polygon object type classification. Therefore, when multi-polygons exist
in a shapefile, the object count will be less than the actual number of G-polygons.
- Completeness Report Data completeness of the TIGER/Line Shapefiles reflects the contents of the Census MAF/TIGER database at the time the TIGER/Line
Shapefiles were created.
- Lineage
-
- Source Information
-
- Source Citation
- Source Scale Denominator
- Type of Source Media online
- Source Time Period of Content
-
- Beginning Position 2010-01
- Ending Position 2010-07
- Source Currentness Reference publication date
- Source Citation Abbreviation MAF/TIGER
- Source Contribution The selected geographic and cartographic information (line segments) are derived from the U.S. Census Bureau's Master Address
File Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) database.
- Process Step
-
- Process Description TIGER/Line Shapefiles are extracted from the Census MAF/TIGER database by nation, state, county, and entity. Census MAF/TIGER
data for all of the aforementioned geographic entities are then distributed among the shapefiles each containing attributes
for line, polygon, or landmark geographic data.
- Source Used Citation Abbreviation MAF/TIGER
- Process Date 2010
- Process Time
- Process Contact
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Metadata Reference Information
- File Identifier b8e99ed1-9f75-4a99-ad17-1b76e7eea339
- Metadata Language English
- Hierarchy Level Dataset
- Date Stamp 2024-12-11
- Metadata Standard Name ISO 19115:2003
- Metadata Standard Version 1.0
- Metadata Contact
-
- Individual Name
- Organization Name Earth Data Analysis Center
- Position Name Clearinghouse Manager
- Role Point of contact
- Voice 505-277-3622 ext. 230
- Facsimile 505-277-3614
- Address
-
- Delivery Point MSC01 1110
- Delivery Point 1 University of New Mexico
- City Albuquerque
- Administrative Area NM
- Postal Code 87131-0001
- Country USA
- Electronic Mail Address clearinghouse@edac.unm.edu
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