TIGER/Line Shapefile, Current, Nation, U.S., Tribal Block Groups

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.

A tribal block group is a cluster of census tabulation blocks within a single tribal census tract delineated by American Indian tribal participants or the Census Bureau for the purpose of presenting demographic data on their reservation and/or off-reservation trust land. The tribal block groups are defined independently of the standard county-based block group delineation. For federally recognized American Indian Tribes with reservations and/or off-reservation trust lands with a population less than 1,200, a single tribal block group is defined. Qualifying reservations and/or off-reservation trust lands with a population greater than 1,200 could define additional tribal block groups within their area without regard to the standard block group configuration. Tribal block groups do not necessarily contain tabulation blocks always beginning with the same number and could contain seemingly duplicate block numbers. Tabulation block numbers are still assigned by using standard block groups, not the tribal block groups. To better identify tribal block groups, the letter code range A through K (except I, which could be confused with a number 1) is used uniquely within each tribal census tract.

The boundaries of tribal block groups are those delineated through the Participant Statistical Areas Program (PSAP) for the 2020 Census.

Data e Risorse

Campo Valore
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.\nThe 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 179.859681
bbox-north-lat 71.439786
bbox-south-lat -14.601813
bbox-west-long -179.231086
contact-email geo.geography@census.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2021"}]
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=Tribal_Block_Groups26640,Tribal_Block_Groups_Labels32973&STYLES=default,default&FORMAT=image/svg+xml&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&CRS=EPSG:4326&BBOX=+31.8716,-111.6682,+31.9330,-111.5451&WIDTH=256&HEIGHT=256
graphic-preview-type URL
guid tl_2021_us_tbg.shp.iso.xml
licence []
metadata-date 2021-06-01
metadata-language eng
metadata_type geospatial
old-spatial {"type": "Polygon", "coordinates": [[[-179.231086, -14.601813], [179.859681, -14.601813], [179.859681, 71.439786], [-179.231086, 71.439786], [-179.231086, -14.601813]]]}
progress completed
resource-type dataset
responsible-party [{"name": "U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Spatial Data Collection and Products Branch", "roles": ["publisher"]}]
spatial {"type": "Polygon", "coordinates": [[[-179.231086, -14.601813], [179.859681, -14.601813], [179.859681, 71.439786], [-179.231086, 71.439786], [-179.231086, -14.601813]]]}
spatial-reference-system urn:ogc:def:crs:EPSG::4269
spatial_harvester true
temporal-extent-begin 2020-06
temporal-extent-end 2021-05
Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • amerigeo
  • amerigeoss
  • ckan
  • geo
  • geoss
  • governmental-units-and-administrative-and-statistical-boundaries-theme
  • nation
  • national
  • national-geospatial-data-asset
  • ngda
  • ngda-portfolio-themes
  • ngdaid94
  • north-america
  • polygon
  • tribal-block-group
  • united-states
  • us
isopen False
metadata_created 2025-11-23T00:28:10.403536
metadata_modified 2025-11-23T00:28:10.403540
notes 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. A tribal block group is a cluster of census tabulation blocks within a single tribal census tract delineated by American Indian tribal participants or the Census Bureau for the purpose of presenting demographic data on their reservation and/or off-reservation trust land. The tribal block groups are defined independently of the standard county-based block group delineation. For federally recognized American Indian Tribes with reservations and/or off-reservation trust lands with a population less than 1,200, a single tribal block group is defined. Qualifying reservations and/or off-reservation trust lands with a population greater than 1,200 could define additional tribal block groups within their area without regard to the standard block group configuration. Tribal block groups do not necessarily contain tabulation blocks always beginning with the same number and could contain seemingly duplicate block numbers. Tabulation block numbers are still assigned by using standard block groups, not the tribal block groups. To better identify tribal block groups, the letter code range A through K (except I, which could be confused with a number 1) is used uniquely within each tribal census tract. The boundaries of tribal block groups are those delineated through the Participant Statistical Areas Program (PSAP) for the 2020 Census.
num_resources 4
num_tags 17
title TIGER/Line Shapefile, Current, Nation, U.S., Tribal Block Groups