Metadata for Montana 1990 Census Block Group Boundaries

- Identification Information
- Data Quality Information
- Spatial Data Organization Information
- Spatial Reference Information
- Entity and Attribute Information
- Distribution Information
- Metadata Reference Information
- Download full XML Metadata

Identification Information:

Citation:
  Originator: Montana State Library
  Publication date: 05/14/1999
  Title: Montana 1990 Census Block Group Boundaries
  Publication place: Helena, Montana
  Publisher: Montana State Library
  Other citation details:
    The former name of the data set on the NRIS web site was "ab135"
  Online linkage: ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/blkgrp1990.zip
  Browse graphic file name: ftp://ftp.geoinfo.msl.mt.gov/Documents/Maps/Thumbnails/20031118_603_thumb.jpg
  Browse graphic file description: Thumbnail image of 1990 Block Group population density map
  Browse graphic file name: ftp://ftp.geoinfo.msl.mt.gov/Documents/Maps/Individual/20031118_603_2003_MTPopDensitybyBlock.gif
  Browse graphic file description: Map of 1990 Block Group population density
Abstract:
  Block Group derived from 1992 U.S. Census Bureau TIGER files, with total 1990 Census population counts.
  Census Block Groups are the regions for which data is available from the long questionnaire sent to 1/6th of the people in the 1990 Census. To link this data to the Summary Tape File 3A data from the Census, you must relate the UNIQUEID field to a field from the STF3A file that is a combination of the COUNTY, TRACTBNA, and BLCKGR fields.
Time period of content:
  Calendar date: 1990
  Currentness reference: Publication Date
Status:
  Progress: Complete
Access constraints: None
Use constraints:
  The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
Point of contact:
  Montana State Library
  PO Box 201800
  Helena, Montana 59620-1800
  Telephone: 406-444-5354
  TDD/TTY telephone: 406-444-4799
  Fax: 406-444-0266
  E-Mail: geoinfo@mt.gov

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Data Quality Information:

Attribute accuracy report:
  Block Group numbers were copied directly from the 1992 TIGER files, and are believed to be accurate.
Completeness report: Data set is complete
Horizontal Positional Accuracy Report:
  Approximate horizontal accuracy is 51 meters, assuming source data meets National Map Accuracy Standards.
Lineage:
  Source information:
    Originator: U.S. Census Bureau
    Publication date: 1992
    Title: 1992 Tiger/Line Files
    Edition: 1992
    Publication place: Washington, DC
    Publisher: U.S. Census Bureau
    Source scale denominator: 100000
    Source contribution: The data set is a sub-set of this source.
    Calendar date: 1992
  Process step:
    Convert TIGER files to Arc/Info format and project them from geographic coordinates to Albers.
  Process date: 05/01/1996
  Process step:
    Dissolve TIGER county coverages on the blockgrp attribute. Summarize the population totals from the individual Census Blocks.
  Process date: 05/14/1996
  Process step:
    Add the county FIPS code to each county attribute table so that the block groups will have a unique attribute when all the counties are joined. Mapjoin all the counties into a single coverage.
  Process date: 05/14/1999
  Process step:
    Bring the UniqueID field back into the shapefile from the coverage version of the layer. It had gone missing somehow. Add the population density field.
  Process date: 01/08/2014

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Spatial Data Organization Information:

Point and vector object information:
  SDTS object type: G-polygon
    SDTS object count: 1024

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Spatial Reference Information:

Horizontal coordinate system definition:
  Grid coordinate system name: State Plane Coordinate System 1983
  SPCS zone identifier: 2500
  Lambert conformal conic:
  Standard parallel: 45
  Standard parallel: 49
  Longitude of central meridian: -109.5
  Latitude of projection origin: 44.25
  False easting: 600000.00000
  False northing: 0.00000
  Planar distance units: meters
  Geodetic model:
    Horizontal datum name: North American Datum of 1983
    Ellipsoid name: Geodetic Reference System 80
    Semi-major axis: 6378137
    Denominator of flattening ratio: 298.257

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Entity and Attribute Information:

Entity type label: blockgrp.dbf
Entity type definition: Polygon Attribute Table
  Attribute label: FID
    Attribute definition: Shapefile sequence number
  Attribute label: Shape
    Attribute definition: Feature geometry
  Attribute label: Area
    Attribute definition: area of the polygon in square meters
  Attribute label: Perimeter
    Attribute definition: perimeter of the polygon in meters
  Attribute label: AB135_
    Attribute definition: Sequence number from original coverage version of the data
  Attribute label: AB135_ID
    Attribute definition: ID number from original coverage version of the data
  Attribute label: COUNTY
    Attribute definition: County FIPS Code

    Attribute Value | Definition of Attribute Value
    53 | LINCOLN
    91 | SHERIDAN
    29 | FLATHEAD
    35 | GLACIER
    19 | DANIELS
    105 | VALLEY
    101 | TOOLE
    71 | PHILLIPS
    51 | LIBERTY
    5 | BLAINE
    41 | HILL
    85 | ROOSEVELT
    73 | PONDERA
    89 | SANDERS
    15 | CHOUTEAU
    83 | RICHLAND
    99 | TETON
    55 | MCCONE
    47 | LAKE
    33 | GARFIELD
    49 | LEWIS AND CLARK
    21 | DAWSON
    27 | FERGUS
    13 | CASCADE
    63 | MISSOULA
    77 | POWELL
    61 | MINERAL
    69 | PETROLEUM
    109 | WIBAUX
    45 | JUDITH_BASIN
    79 | PRAIRIE
    59 | MEAGHER
    17 | CUSTER
    39 | GRANITE
    87 | ROSEBUD
    7 | BROADWATER
    25 | FALLON
    65 | MUSSELSHELL
    81 | RAVALLI
    107 | WHEATLAND
    37 | GOLDEN_VALLEY
    43 | JEFFERSON
    111 | YELLOWSTONE
    103 | TREASURE
    23 | DEER_LODGE
    11 | CARTER
    93 | SILVER_BOW
    97 | SWEET_GRASS
    31 | GALLATIN
    67 | PARK
    95 | STILLWATER
    3 | BIG_HORN
    1 | BEAVERHEAD
    57 | MADISON
    75 | POWDER_RIVER
    9 | CARBON
    113 | YELLOWSTONE_P

  Attribute label: UniqueID
    Attribute definition:
      String that uniquely identifies a block group within Montana.
      This is the link to the the combination of the COUNTY, TRACTBNA, and BLCKGR fields from the Census Summary Tape File 3A data tables.
  Attribute label: Population
    Attribute definition: Total Population of the Block Group, 1990 Census
    Range domain minimum: 0
    Range domain maximum: 5938
    Attribute units of measure: persons
  Attribute label: Pct_Walk
    Attribute definition:
      Percent of respondents to the 1990 Census long questionnaire who said they walk to work
  Attribute label: Density
    Attribute definition: Population density in square miles

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Distribution Information:

Distributor:
  Montana State Library
  PO Box 201800
  Helena, MT 59620-1800
  Telephone: 406-444-5354
  TDD/TTY telephone: 406-444-4799
  Fax: 406-444-0266
  E-Mail: geoinfo@mt.gov
Resource description: Downloadable Data
Distribution liability:
  The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
Standard order process:
  Digital form:
    Format name: ESRI Shapefile
    Online option:
    ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/blkgrp1990.zip

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Metadata Reference Information:

Metadata date: 01/08/2014
Metadata review date: 04/17/2013
Metadata review date: 09/29/2004
Metadata review date: 06/10/1999
Metadata contact:
  Montana State Library
  PO Box 201800
  Helena, Montana 59620-1800
  Telephone: 406-444-5354
  TDD/TTY telephone: 406-444-4799
  Fax: 406-444-0266
  E-Mail: geoinfo@mt.gov

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