TIGER/Line Shapefile, 2014, state, North Carolina, Current Block Group State-based Shapefiles
Dataset Identification:
Resource Abstract:
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
2010 Census.
Citation
Title TIGER/Line Shapefile, 2014, state, North Carolina, Current Block Group State-based Shapefiles
alternateTitle
National Geospatial Data Asset (NGDA) Current Block Group
Title ANSI INCITS 38:2009 (Formerly FIPS 5-2), ANSI INCITS 31:2009 (Formerly FIPS 6-4),ANSI INCITS 454:2009 (Formerly FIPS 8-6),
ANSI INCITS 455:2009(Formerly FIPS 9-1), ANSI INCITS 446:2008(Geographic Names Information System (GNIS))
Theme keywords (theme):
Governmental Units and Administrative and Statistical Boundaries Theme
National Geospatial Data Asset
NGDA
thesaurus name >
Title NGDA Portfolio Themes
revision Date
2010-02-01
other Citation Details
http://www.fgdc.gov/initiatives/resources/2013-2-1-ngda-data-themes-fgdc-sc-revised.pdf
other Citation Details
Cinergi keyword enhanced at Sun Nov 13 03:40:16 UTC 2016
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.
Resource language:
eng
Character set encoding of resource:
8859part1
Resource Maintenance Information
maintenance or update frequency:
notPlanned
Constraints on resource usage:
Legal Constraints
Access Constraints
otherRestrictions
use constraint:
otherRestrictions
Other constraints
Access Constraints: None
Other constraints
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 acknowledgment 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.
Spatial representation type code:
vector
Processing environment:
The TIGER/Line shapefiles contain geographic data only and do not include display mapping software or statistical data. For
information on how to use the TIGER/Line shapefile data with specific software package users shall contact the company that
produced the software.
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
source description
online
source citation
Title MAF/TIGER
revision Date
2014
Completeness Commission
Completeness Omission
evaluation Method Description
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.
ConceptualConsistency
measure Description
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 the Geographic Names Information System (GNIS). 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.
fees The online copy of the TIGER/Line Shapefiles may be accessed without charge.
Ordering Instructions
To obtain more information about ordering TIGER/Line Shapefiles visit http://www.census.gov/geo/www/tiger
Format
Format name TGRSHP (compressed)
Format version
file Decompression Technique
The TIGER/Line shapefiles contain geographic data only and do not include display mapping software or statistical data. For
information on how to use the TIGER/Line shapefile data with specific software package users shall contact the company that
produced the software.