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Census Block Groups (TIGER/Line), WI 2020

Identification Information

Citation
Title
Census Block Groups (TIGER/Line), WI 2020
Originator
U.S. Census Bureau
Publication Date
2021-11-17
Edition
2020
Geospatial Data Presentation Form
mapDigital
Collection Title
Statewide
Abstract
This data represents Block Groups from the U.S. Census Bureau for Wisconsin in 2020. [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. Block Groups (BGs) are clusters of blocks within the same census tract. Each census tract contains at least one BG, and BGs are uniquely numbered within census tracts. BGs have a valid code range of 0 through 9. BGs have the same first digit of their 4-digit census block number from the same decennial census. For example, tabulation blocks numbered 3001, 3002, 3003,.., 3999 within census tract 1210.02 are also within BG 3 within that census tract. BGs coded 0 are intended to only include water area, no land area, and they are generally in territorial seas, coastal water, and Great Lakes water areas. Block groups generally contain between 600 and 3,000 people. A BG usually covers a contiguous area but never crosses county or census tract boundaries. They may, however, 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. The BG boundaries in this release are those that were delineated as part of the Census Bureau's Participant Statistical Areas Program (PSAP) for the 2020 Census.]
Purpose
This data is intended for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. [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.]
Supplemental Information
This is an archived copy of the data held at UW-Madison.
Temporal Extent
Time Instant
2020-01-01T00:00:00
Bounding Box
West
-92.889433
East
-86.249548
North
47.309822
South
42.49172
ISO Topic Category
boundaries
Place Keyword
Wisconsin
Place Keyword Thesaurus
GNS
Theme Keyword
Census districts
Theme Keyword Thesaurus
LCSH
Resource Constraints
Use Limitation
[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. 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 boundaries 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.]
Legal Constraints
Use Limitation
Although this data is being distributed by the University of Wisconsin-Madison, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials.
Status
completed
Maintenance and Update Frequency
unknown
Language
eng
Credit
U.S. Census Bureau
Point of Contact
Contact
U.S. Census Bureau

Spatial Reference Information

Reference System Identifier
Code
4269
Code Space
EPSG
Version
9.7

Data Quality Information

Lineage
Process Step
Description
Process Description: Provided access to archived data at UW-Madison.
Process Date
2021-11-17T00:00:00

Distribution Information

Format Name
Shapefile
Format Version
1.0
Distributor
University of Wisconsin-Madison
Distributor
U.S. Census Bureau
Online Access
https://gisdata.wisc.edu/public/WI_CensusTL_BlockGroups_2020.zip
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
GeoData@Wisconsin
Function
download

Spatial Representation Information

Vector
Topology Level
geometryOnly
Vector Object Type
composite
Vector Object Count
4692

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
1A7CD614-9504-4087-983A-E1CA9FFE87F9
Metadata Point of Contact
Name
Arthur H. Robinson Map Library
Position Name
Metadata technician
Delivery Point
550 N. Park Street
City
Madison
Administrative Area
WI
Postal Code
53706
Country
US
Email
askmap@library.wisc.edu
Phone
(608) 262-1471
Metadata Date Stamp
2021-11-17
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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