Snake/Salt Basin Plan

Wyoming Bedrock Geology

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?
    Title: bedgeol_ssdd27
    Abstract:
    The geologic map was digitized from original scribe sheets used to prepare the published Geologic Map of Wyoming (Love and Christiansen, 1985), consequently at a 1:500,000 scale. The dataset has both polygon and line features (faults), with attributes derived from the 1985 map.

  1. How should this data set be cited?

    U.S. Geological Survey, 1994, bedgeol_ssdd27: U.S. Geological Survey, Denver, CO.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -111.049455
    East_Bounding_Coordinate: -109.763680
    North_Bounding_Coordinate: 44.490398
    South_Bounding_Coordinate: 42.484280

  3. What does it look like?

    <URL:http://www.sdvc.uwyo.edu/24k/geol/wygeol.gif> (gif)
    Bedrock geology

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

    Calendar_Date: 1985
    Currentness_Reference: date of publication

  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?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (3837)
      • GT-polygon composed of chains (22916)

    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 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    bedgeol_ssdd27

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    AREA

    PERIMETER

    GEOL_DD_

    GEOL_DD_ID

    P1

    NAME

    COUNT

    DETAIL

    CCA

    DOT

    PLT

    MAJOR1

    MINOR1

    ACRES

    Entity_and_Attribute_Overview:
    This dataset has both line (arc) entities and polygon attributes. Polygon attibutes: P1: shorthand attribute NAME: name COUNT: number of polygons of each type (name) DETAIL: detailed description BW: Line pattern from CARTO.LIN (a linesymbol set in Arc/Info; for use in displaying the map in ArcPLOT) CCA: Line pattern from CCA.LIN or shade color from CCA.SHD; for use in displaying the map in ArcPlot DOT: Shade pattern from DOT.SHD (ArcPlot) PLT: Shade pattern from PLOTTER.SHD (ArcPlot) MINOR1: DLG3 optional style attribute MINOR2: DLG3 optional style attribute In Arc Export file format, when the file is imported it also comes with an INFO file with a *.NAME extension, containing descriptions for the codes in the polygon attribute table. In ArcView shapefile format, the shapefile is accompanied by a dbase file, name.dbf, containing descriptions for the the codes in the attribute table.
    Entity_and_Attribute_Detail_Citation:
    More information about associated files and attributes are contained in the USGS Open-File 94-0425 accompaning the data set in a text format. These documents can be downloaded via anonymous ftp from a USGS server, greenwood.cr.usgs.gov (137.177.48.5) in a directory named /pub/open-file-reports/ofr-94-0425.

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?

    David Love, Anne Coe Christiansen: original scribe sheets. Pat Stamile, USGS. Chris Arneson and Laisan Serebryakov, WWRC.

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

    Gregory N. Green and Patricia H. Drouillard
    U.S. Geological Survey
    Box 25046 Mail Stop 905
    Denver, Colorado 80225
    USA

    n/a (voice)
    n/a

    Hours_of_Service: n/a

Why was the data set created?
This geologic map was prepared as part of a study of digital methods and techniques as applied to complex geologic maps.

How was the data set created?
  1. From what previous works were the data drawn?

    scribe sheets (source 1 of 1)
    Christiansen, Love and , 1985, geologic scribe sheets.

    Type_of_Source_Media: stable base contact prints
    Source_Contribution: source data

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

    Date: unknown (process 1 of 2)
    The geologic map was digitized from scribe sheets used to prepare the published Geologic Map of Wyoming (Love and Christiansen, 1985), consequently at a 1:500,000 scale. Stable base contact prints of the scribe sheets were scannned on a Tektronix 4991 digital scanner. The scanner automatically converts the scanned image to an ASCII vector format. These vectors were transferred to a VAX minicomputer, where they were loaded into Arc/Info. The dataset includes both linear and polygon features, with attributes derived from the original 1985 map.

    (process 2 of 2)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\decook\LOCALS~1\Temp\xml4D.tmp

  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?

    The accuracy of the attributing is unknown

  2. How accurate are the geographic locations?

    The USGS does not have National Mapping Accuracy Standards for data produced at the 1:500,000-scale.

  3. How accurate are the heights or depths?

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

    Unknown, but likely to be as complete in attributing as the Love and Christiansen geologic map.

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

    Polygon topology present and Arc/Info reports matching labels/polygons Line toplogy also present.

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: scale is 1:500,000 and should not be used outside that range

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

    Data Manager
    Spatial Data and Visualization Center
    Box 4008 University Station
    Laramie, Wyoming 82071
    USA

    307-766-2735 (voice)
    n/a

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate used described in this metadata document.

  4. How can I download or order the data?

Who wrote the metadata?
Dates:
Last modified: 14-May-2004

Metadata author:
Margo Berendsen
Box 4008 University Station
Laramie, Wyoming 82071
USA

307-766-2751 (voice)
meh@uwyo.edu

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

Metadata extensions used:

Generated by mp version 2.7.33 on Fri May 14 13:37:44 2004