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TIGER/Line Shapefile, 2021, State, American Samoa, Census Tracts

Metadata Updated: November 1, 2022

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 tracts are small, relatively permanent statistical subdivisions of a county or equivalent entity, and were defined by local participants as part of the 2020 Census Participant Statistical Areas Program. The Census Bureau delineated the census tracts in situations where no local participant existed or where all the potential participants declined to participate. 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. The spatial size of census tracts varies widely depending on the density of settlement. Physical changes in street patterns caused by highway construction, new development, and so forth, may require boundary revisions. In addition, census tracts occasionally are split due to population growth, or combined as a result of substantial population decline. Census tract boundaries generally follow visible and identifiable features. They may follow legal boundaries such as minor civil division (MCD) or incorporated place boundaries in some States and situations to allow for census tract-to-governmental unit relationships where the governmental boundaries tend to remain unchanged between censuses. 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 noncontiguous areas. These noncontiguous areas may occur where the census tracts are coextensive with all or parts of legal entities that are themselves noncontiguous. For the 2010 Census and beyond, the census tract code range of 9400 through 9499 was enforced for census tracts that include a majority American Indian population according to Census 2000 data and/or their area was primarily covered by federally recognized American Indian reservations and/or off-reservation trust lands; the code range 9800 through 9899 was enforced for those census tracts that contained little or no population and represented a relatively large special land use area such as a National Park, military installation, or a business/industrial park; and the code range 9900 through 9998 was enforced for those census tracts that contained only water area, no land area.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date October 31, 2022
Metadata Created Date November 1, 2022
Metadata Updated Date November 1, 2022
Reference Date(s) 2021 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from Archived NGDA Standalones

Graphic Preview

URL for the TigerWeb Mapping Service

Additional Metadata

Resource Type Dataset
Metadata Date October 31, 2022
Metadata Created Date November 1, 2022
Metadata Updated Date November 1, 2022
Reference Date(s) 2021 (publication)
Responsible Party U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Spatial Data Collection and Products Branch (Publisher)
Contact Email
Guid tl_2021_60_tract.shp.iso.xml
Access Constraints 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.
Bbox East Long -168.101612
Bbox North Lat -10.997203
Bbox South Lat -14.601813
Bbox West Long -171.141907
Coupled Resource
Frequency Of Update notPlanned
Graphic Preview Description URL for the TigerWeb Mapping Service
Graphic Preview File https://tigerweb.geo.census.gov/arcgis/services/TIGERweb/tigerWMS_Current/MapServer/WmsServer?REQUEST=GetMap&SERVICE=WMS&VERSION=1.3.0&LAYERS=Census_Tracts7651,Census_Tracts_Labels33558&STYLES=default,default&FORMAT=image/svg+xml&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&CRS=EPSG:4326&BBOX=+38.8810,-77.0401,+38.9008,-77.0035&WIDTH=256&HEIGHT=256
Graphic Preview Type URL
Harvest Object Id ee754d3c-949c-4b77-bc3f-68a19ac37a16
Harvest Source Id 1f2212ed-f1f8-4ea1-b928-e306f77f2247
Harvest Source Title Archived NGDA Standalones
Licence
Lineage
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-171.141907, -14.601813], [-168.101612, -14.601813], [-168.101612, -10.997203], [-171.141907, -10.997203], [-171.141907, -14.601813]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4269
Spatial Harvester True
Temporal Extent Begin 2020-06
Temporal Extent End 2021-05

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