Metadata for Montana 1990 Population Density 1-km grid

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

Identification Information:

Citation:
  Originator: Montana State Library
  Publication date: 11/19/1993
  Title: Montana 1990 Population Density 1-km grid
  Publication place: Helena, Montana
  Publisher: Montana State Library
  Other citation details:
    The former name of the data set on the NRIS web site was "oc39"
  Online linkage: ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/dens1990.zip
  Browse graphic file name: ftp://ftp.geoinfo.msl.mt.gov/Documents/Maps/Thumbnails/19900401_600_thumb.jpg
  Browse graphic file description: Thumbnail image of Montana 1990 Population Density map
  Browse graphic file name: ftp://ftp.geoinfo.msl.mt.gov/Documents/Maps/Individual/19900401_600_1990_MTPopDensity.gif
  Browse graphic file description: Montana 1990 Population Density map
Abstract:
  Montana Population in persons per square mile from the 1990 Census. Derived from U.S. Census Bureau TIGER files and population counts. The original data was smoothed, and the highest resulting density in each 1-kilometer grid cell was assigned to the cell.
Time period of content:
  Calendar date: 04/01/1990
  Currentness reference: Ground Condition
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:

Lineage:
  Source information:
    Originator: U.S. Census Bureau
    Publication date: 1990
    Title: 1990 TIGER/Line Files
    Edition: Census
    Publication place: Washington, DC
    Publisher: U.S. Census Bureau
    Source scale denominator: 100000
    Source contribution:
      This is the source of the Census Block boundaries that were used to calculate the population density denominator.
    Calendar date: 1990
  Source information:
    Originator: U.S. Census Bureau
    Publication date: 04/01/1990
    Title: Public Law 94-171 Files
    Publication place: Washington, DC
    Publisher: U.S. Census Bureau
    Source contribution:
      This is the source of the population counts per Census Block that formed the numerator of the population densities.
    Calendar date: 04/01/1990
  Process step:
    Convert 57 Montana TIGER files to Arc/Info format, dissolve polygons to create Census Blocks, and relate Census Block numbers to the Public Law 94-171 files.
  Process date: 10/12/1991
  Process step:
    Convert 57 Census Block coverages to 100m grid cells based on population density. Set the value of each cell to be the mean value of each cell and its 81 nearest neighbors.
    Arc/Info command: s2 = focalmean (s1,rectangle,9,9)
  Process date: 11/18/1993
  Process step:
    Assign each cell the density of the highest of the 81 nearby cells. Arc/Info command: s3 = focalmax (s2,rectangle,9,9)
  Process date: 11/18/1993
  Process step:
    Resample the data from 100 meter resolution to 1000.
    Arc/Info commands: setcell 1000, s4 = s3.
    Join the 57 counties into a single data set with the "merge" command.
  Process date: 11/18/1993

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Spatial Data Organization Information:

Raster object information:
  Raster object type: Grid Cell
  Row count: 531
  Column count: 919

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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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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: GeoTIFF and ESRI Shapefile
    Online option:
    ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Census/dens1990.zip

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Metadata Reference Information:

Metadata date: 01/22/2014
Metadata review date: 04/17/2013
Metadata review date: 09/29/2004
Metadata review date: 11/05/2001
Metadata review date: 03/05/1997
Metadata review date: 12/27/1993
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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