Metadata for Greater Yellowstone Area, Montana Railroads from 1:24,000 scale U.S.G.S. quadrangles

- 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: 01/30/2002
  Title:
    Greater Yellowstone Area, Montana Railroads from 1:24,000 scale U.S.G.S. quadrangles
  Publication place: Helena, Montana
  Publisher: Montana State Library
Browse graphic file name: http://nris.mt.gov/nsdi/nris/dlgrr1.gif

Browse graphic file description: Simple image of the data set and/or its extent.

Browse graphic file type: gif

Abstract:
  Railroads from 1:24,000 scale U.S. Geological Survey quadrangles, Greater Yellowstone Area, Montana.
  The quadrangles have been joined into a single data set, but have not been edgematched. The USGS major and minor attribute codes have been replaced with the codes shown in this metadata record.
  These data have been removed from the State Library web site because they are obsolete and better recent data may be available. These data are still available on request from the State Library data archive.
Purpose: Base map data.
Time period of content:
  Beginning date: 1948
  Ending date: 1996
  Currentness reference: Publication Date
Status:
  Progress: Complete
  Maintenance and update frequency: Unknown
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, MT 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:
  Attributes were interpreted from the original DLG files by a computer program. The accuracy of this interpretation has not been extensively checked. Attribute accuracy of the original Digital Line Graph data is estimated by the USGS at 98.5 percent, and was tested by them as follows:
  - manual comparison of the source with hard copy plots.
  - symbolized display of the digital line graph on an interactive compter graphic system.
  - Selected attributes that could not be visually verified on plots or on screen, were interactively queried and verified on screen.
  In addition, U.S. Geological Survey (USGS) Production System (PROSYS) software tested the attributes against a master set of valid attributes for the category; it also checked for selected valid attribute combinations, and for valid attributes relative to topology and dimensionality. All attribute data conform to the attribute codes current as of the date of digitizing.
Logical consistency report: Arc-node topology exists.
Completeness report:
  For DLG data, Digital Revision Status = Not revised:
  Data completeness reflects the content of the source quadrangle. Features may have been eliminated or generalized on the source graphic, due to scale and legibility constraints.
  For DLG data, Digital Revision Status = Limited Update:
  This file has undergone limited update digital revision. The file contains only (1) those features that are photoidentifiable on monoscopic source, supplemented with limited ancillary source, and (2) those features, present on the original source quadrangle, that can not be reliably photoidentified but that are not considered particularly prone to change.
  For DLG data, Digital Revision Status = Standard Update:
  This file has undergone standard update digital revision. The data completeness of this file meets National Mapping Division standards for feature content.
Horizontal Positional Accuracy Report:
  Approximate accuracy is 12 meters, assuming the source maps meet National Map Accuracy Standards (NMAS). NMAS horizontal accuracy requires that at least 90 percent of points tested are within 0.02 inches of the true position.
  The digital data are estimated to contain a horizontal positional error of less than or equal to 0.003 inches standard error in the two component directions relative to the source quadrangle. Comparison to the graphic source is used as control to assess digital positional accuracy.
  Cartographic offsets may be present on the graphic source, due to scale and legibility constraints. Digital map elements require edge alignment between data sets. Data along each quadrangle edge are tested against the data set for the adjacent quadrangle using PROSYS; tests check for positional accuracy between data sets within a 0.02 inches tolerance. Features with like dimensionality, and with or without like attribution, that are within the tolerance are adjusted by moving the feature equally in both data sets. Features outside the tolerance are not moved.
Lineage:
  Source information:
    Originator:
      National Mapping Division
      U.S. Geological Survey
    Publication date: 1948
    Title: 1:24,000-scale Digital Line Graphs
    Publication place: Reston, VA
    Publisher: U.S. Geological Survey
    Other citation details:
      See http://nris.mt.gov/nsdi/nris/dlg1.dbf for publication dates of the various quadrangles.
    Source scale denominator: 24000
    Source contribution: The data set is a re-processed copy of this source.
    Beginning date: 1948
    Ending date: 1996
  Process step:
    Interpret USGS attributes, project quadrangles to State Plane Coordinates, and join quadrangles into one data set. The procedures used to do this are shown in the Arc/Info AML programs at http://nris.mt.gov/nsdi/nris/dlgaml1.zip.
  Process date: 01/30/2002

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Spatial Data Organization Information:

Point and vector object information:
  SDTS object type: Complete Chain
    SDTS object count: 228
  SDTS object type: Node, planar graph
    SDTS object count: 195

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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: RAILROAD.AAT
Entity type definition: Arc Attribute Table
  Attribute label: CODE
    Attribute definition: Railroad arc type code

    Attribute Value | Definition of Attribute Value
    1 | Railroad
    2 | Railroad underpassing
    3 | Railroad on bridge
    4 | Railroad in tunnel
    6 | Abandoned railroad
    7 | Abandoned underpassing railroad
    8 | Railroad, underpassing, arbitrary closure
    11 | Railroad siding
    12 | Railroad siding underpassing
    13 | Railroad siding on bridge
    15 | Railroad siding in snowshed
    16 | Abandoned railroad siding
    18 | Railroad siding, arbitrary closure
    21 | Yard limit
    22 | Yard limit underpassing
    31 | Turntable
    41 | Roundhouse
    52 | Railroad tunnel portal
    209 | Railroad yard boundary

  Attribute label: TRACKS
    Attribute definition: Number of railroad tracks
    Attribute units of measure: each
  Attribute label: RVIS
    Attribute definition: Photorevision code

    Attribute Value | Definition of Attribute Value
    0 | Not photorevised
    1 | Photorevised

Entity type label: RAILROAD.NAT
Entity type definition: Node Attribute Table
  Attribute label: CODE
    Attribute definition: Railroad point type code

    Attribute Value | Definition of Attribute Value
    1 | Bridge abutment
    2 | Tunnel portal
    401 | Turntable

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Distribution Information:

Distributor:
  Montana State Library
  PO Box 201800
  Helena, MT 59620-1800
  Telephone: 1-406-444-5354
  E-Mail: geoinfo@mt.gov
Resource description: Offline Data
Distribution liability:
  DISCLAIMER: The Montana State Library Geographic Information Services 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.

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Metadata Reference Information:

Metadata date: 04/11/2013
Metadata review date: 05/26/2010
Metadata review date: 09/29/2004
Metadata review date: 01/30/2002
Metadata contact:
  Gerry Daumiller
  Montana State Library
  P.O. Box 201800
  Helena, Montana 59620-1800
  Telephone: (406) 444-5355
  Fax: (406) 444-0581
  E-Mail: gdaumiller@mt.gov

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