Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Series Information for 2020 Census Block State-based TIGER/Line Shapefiles, Current

Metadata Updated: December 15, 2023

This is a series-level metadata record. 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 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. Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces.

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 November 7, 2023
Metadata Created Date December 15, 2023
Metadata Updated Date December 15, 2023
Reference Date(s) 2023 (publication), 2023-10 (creation), 2023-10 (lastUpdate)
Frequency Of Update notPlanned

Metadata Source

Harvested from Current NGDA Standalones

Graphic Preview

URL for the TIGERWeb Mapping Service

Additional Metadata

Resource Type Series
Metadata Date November 7, 2023
Metadata Created Date December 15, 2023
Metadata Updated Date December 15, 2023
Reference Date(s) 2023 (publication), 2023-10 (creation), 2023-10 (lastUpdate)
Responsible Party U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geospatial Products Branch (Point of Contact)
Contact Email
Guid series_tl_2023_tabblock20.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 146.154418
Bbox North Lat 71.439786
Bbox South Lat -14.601813
Bbox West Long -178.443593
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=_020_Census_Blocks44514,_020_Census_Blocks_Labels28239&STYLES=default,default&FORMAT=image/png+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 f0a10fc0-b50e-49a2-92a2-831ff2db7301
Harvest Source Id 02d50b34-1cc0-456c-9791-b503aacfa729
Harvest Source Title Current NGDA Standalones
Licence
Lineage
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-178.443593, -14.601813], [146.154418, -14.601813], [146.154418, 71.439786], [-178.443593, 71.439786], [-178.443593, -14.601813]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4269
Spatial Harvester True
Temporal Extent Begin 2023-06
Temporal Extent End 2024-10

Didn't find what you're looking for? Suggest a dataset here.

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov