Metadata for Greater Yellowstone Area, Montana Hydrography Polygons 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 Hydrography Polygons 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/dlghd2.gif

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

Browse graphic file type: gif

Abstract:
  Hydrography polygons from USGS 1:24,000 scale quadrangles, Greater Yellowstone Area, Montana. The quadrangles have been joined into a single data set, but have not been edgematched, except to perserve polygon topology. The USGS major and minor attribute codes have been replaced with the codes shown in this metadata record.
  A few of the DLG files from USGS had coordinates in the NAD83 datum, while most were in NAD27. Because of the diffrence between the position of the quadrangle boundaries between NAD83 and NAD27, there are gaps in the data, generally about 200 meters wide, between adjacent quadrangles that have different datums.
  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: Polygon and arc-node topology exist.
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.
Vertical positional accuracy report:
  Elevation of some polygons was read or estimated from the source quadrangles. National Map Accuracy Standards require that 90 percent of the elevations be within half the contour interval of the source maps (contour interval is usually 20 or 40 feet). For polygons with a value other than 0 for M619, the elevation is estimated.
Lineage:
  Source information:
    Originator:
      National Mapping Division
      U.S. Geological Survey
    Publication date: 2001
    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: 11831
  SDTS object type: GT-polygon composed of chains
    SDTS object count: 6724
  SDTS object type: Area Point
    SDTS object count: 6719

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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
Altitude system definition:
  Altitude datum name: NGVD29
  Altitude resolution: 1
  Altitude distance units: FEET
  Altitude encoding method: Attribute values

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Entity and Attribute Information:

Entity type label: LAKE.PAT
Entity type definition: Polygon Attribute Table
  Attribute label: CODE
    Attribute definition: Code for hydrography polygon type

    Attribute Value | Definition of Attribute Value
    0 | Land
    110 | Stream
    120 | Stream, Intermittent
    130 | Stream, Rapids
    140 | Stream, Submerged
    210 | Ditch
    300 | Lake or Pond
    311 | Lake or Pond, Wetland
    313 | Lake or Pond, Intermittent
    410 | Reservoir
    413 | Reservoir, Intermittent
    420 | Inundation Area
    422 | Inundation Area, Wetland
    450 | Tailings Pond
    460 | Aquaculture Pond
    461 | Filtration Pond
    810 | Glacier or Snowfield
    823 | Spillway
    830 | Wash or Ephemeral Drain
    850 | Wetland
    851 | Wetland, Submerged
    852 | Wetland, Coincident Woods
    860 | Sewage Disposal Pond

  Attribute label: RVIS
    Attribute definition: Photorevision code

    Attribute Value | Definition of Attribute Value
    0 | Feature is not photo-revised
    1 | Feature is photo-revised

  Attribute label: M619
    Attribute definition: Estimated elevation code

    Attribute Value | Definition of Attribute Value
    0 | Elevation was printed on source map
    1 | Elevation was estimated from source map

  Attribute label: ELEV
    Attribute definition:
      Elevation, feet
      Elevation of zero indicates that elevation was not recorded.
    Range domain minimum: 3797
    Range domain maximum: 11780
    Attribute units of measure: feet
    Attribute measurement resolution: 1
    Attribute value accuracy information:
      Attribute value accuracy: 20
      Attribute value accuracy explanation:
        Accuracy of 20 feet is based on National Map Accuracy Standards for maps with 40-foot contours. Some of the source maps have 20- or 80-foot contours, and the accuracy there would be 10 or 40 feet.

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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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