TIGER/Line 2015 Census

Metadata also available as

Frequently-anticipated questions:


What does this data set describe?

Title: TIGER/Line 2015 Census
Abstract:
The TIGER/Line Files are shapefiles and related database files (.dbf) that 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 File 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 2010 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, 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.
  1. How should this data set be cited?

    U.S. Department of Commerce, U.S. Census Bureau, Geography Divisi, 2015, TIGER/Line 2015 Census, Census Tract national-based.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -179.231086
    East_Bounding_Coordinate: 179.859681
    North_Bounding_Coordinate: 71.441059
    South_Bounding_Coordinate: 51.175092

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: Jan-2010
    Ending_Date: Jul-2010
    Currentness_Reference: publication date

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference:
      Federal Information Processing Standards (FIPS), ANSI, and feature names.
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (167)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000458. Longitudes are given to the nearest 0.000458. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983 in the 48 contiguous states, the District of Columbia, Alaska, Hawaii, Puerto Rico, the Virgin Islands of the United States, and the Pacific Island Areas..
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298257.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    TIGER/Line 2015 Census, Census Tract
    2015 Census, Census Tract national-based (Source: U.S. Census Bureau)

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    STATEFP10
    2015 Census state Federal Information Processing Standards (FIPS) codes (Source: U.S. Census Bureau)

    Formal codeset
    Codeset Name:INCITS.38-200x (R2004), Codes for the Identification of the States, the District of Columbia, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 5-2)
    Codeset Source:U.S. Census Bureau

    COUNTYFP10
    2015 Census county Federal Information Processing Standards (FIPS) code (Source: U.S. Census Bureau)

    Formal codeset
    Codeset Name:INCITS.31-200x (R2007), Codes for the Identification of the Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 6-4)
    Codeset Source:U.S. Census Bureau

    TRACTCE10
    2015 Census census tract code (Source: U.S. Census Bureau)

    ValueDefinition
    000000Water tract in some coastal and Great Lakes water and territorial sea
    000100 to 998999Census tract number

    GEOID10
    Census tract identifier, a concatenation of 2015 Census state Federal Information Processing Standards (FIPS) code, county FIPS code, and census tract code (Source: U.S. Census Bureau)

    Formal codeset
    Codeset Name:INCITS.38-200x (R2004), Codes for the Identification of the States, the District of Columbia, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 5-2), INCITS.31-200x (R2007), Codes for the Identification of the Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas of the United States (Formerly FIPS 6-4) and the census tract code that appears in TRACTCE10
    Codeset Source:U.S. Census Bureau

    NAME10
    2015 Census census tract name, this is the census tract code converted to an integer or integer plus two-digit decimal if the last two characters of the code are not both zeros. (Source: U.S. Census Bureau)

    Formal codeset
    Codeset Name:Refer to the online census tract gazetteer file at URL: <http://www.census.gov/geo/www/gazetteer/gazette.html>
    Codeset Source:U.S. Census Bureau

    NAMELSAD10
    2015 Census translated legal/statistical area description and the census tract name (Source: U.S. Census Bureau)

    Formal codeset
    Codeset Name:Refer to the online census tract gazetteer file at URL: <http://www.census.gov/geo/www/gazetteer/gazette.html> and translated legal/statistical area description code CT, Census Tract
    Codeset Source:U.S. Census Bureau

    MTFCC10
    MAF/TIGER feature class code (Source: U.S. Census Bureau)

    ValueDefinition
    G5020Census Tract

    FUNCSTAT10
    2015 Census functional status (Source: U.S. Census Bureau)

    ValueDefinition
    SStatistical entity

    ALAND10
    2015 Census land area (square meters) (Source: U.S. Census Bureau)

    ValueDefinition
    0 to 9,999,999,999,999Blank

    AWATER10
    2015 Census water area (square meters) (Source: U.S. Census Bureau)

    ValueDefinition
    0 to 9,999,999,999,999Blank

    INTPTLAT10
    2015 Census latitude of the internal point (Source: U.S. Census Bureau)

    ValueDefinition
    00Blank

    INTPTLON10
    2015 Census longitude of the internal point (Source: U.S. Census Bureau)

    ValueDefinition
    00Blank

    Shape.STArea()

    Shape.STLength()


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
    4600 Silver Hill Road, Stop 7400
    Washington, DC 20233-7400
    United States

    301-763-1128 (voice)
    301-763-4710 (FAX)
    geo.tiger@census.gov


Why was the data set created?

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.


How was the data set created?

  1. From what previous works were the data drawn?

    MAF/TIGER (source 1 of 1)
    U.S. Department of Commerce, U.S. Census Bureau, Geography Divisi, Unpublished material, Census MAF/TIGER database.

    Type_of_Source_Media: online
    Source_Contribution:
    The selected geographic and cartographic information (line segments) are derived from the U.S. Census Bureau's Master Address File Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) database.

  2. How were the data generated, processed, and modified?

    Date: 2015 (process 1 of 3)
    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.

    Data sources used in this process:

    • Census MAF/TIGER

    (process 2 of 3)
    Shapefiles were downloaded from <http://www.census.gov/geo/www/tiger>. TIGER/Line state-based Shapefiles were merged into a single U.S. layer, and reprojected to WGS84.

    Person who carried out this activity:

    Jonathan Justice
    U.S. Department of Agriculture, Natural Resources Conservation Service, National Geospatial Management Center
    Authoritative Data Team
    501 W. Felix St., Bldg. 23
    Fort Worth, Texas 76115
    USA

    817-509-3432 (voice)
    817-509-3469 (FAX)
    jonathan.justice@ftw.usda.gov

    Hours_of_Service: 7:00 am - 3:30 pm, Central Time
    Contact_Instructions: Prefer e-mail.
    Date: 16-Aug-2011 (process 3 of 3)
    Dataset copied.

    Data sources used in this process:

    • Server=p119collinsp401.ftw.nrcs.usda.gov; Service=5171; Database=BASEDEV; User=base; Version=sde.DEFAULT

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Accurate against Federal Information Processing Standards (FIPS), FIPS Publication 6-4, and FIPS-55 at the 100% level for the codes and base names. The remaining attribute information has been examined but has not been fully tested for accuracy.

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    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.

  5. How consistent are the relationships among the observations, including topology?

    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 FIPS 55. 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.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

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.

  1. Who distributes the data set? (Distributor 1 of 1)

    U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
    4600 Silver Hill Road, Stop 7400
    Washington, DC 20233-7400
    United States

    301-763-1128 (voice)
    301-763-4710 (FAX)
    geo.tiger@census.gov

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    No warranty, expressed or implied is made with regard to the accuracy of these data, and no liability is assumed by the U.S. Government in general or the U.S. Census Bureau in specific as to the spatial or attribute accuracy of the data. The act of distribution shall not constitute any such warranty and no responsibility is assumed by the U.S. government in the use of these files. The boundary information in the TIGER/Line Shapefiles is for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes do not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    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.


Who wrote the metadata?

Dates:
Last modified: 07-May-2015
Metadata author:
U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
c/o REQUIRED: The person responsible for the metadata information.
4600 Silver Hill Road, Stop 7400
Washington, DC 20233-7400
United States

301-763-1128 (voice)
301-763-4710 (FAX)
geo.tiger@census.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.6 on Thu Oct 27 15:47:59 2011