Bedrock Geology of Wyoming

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title: Bedrock Geology of Wyoming

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, Bedrock Geology of Wyoming: U.S. Geological Survey, Denver, CO.

   Online Links:

   • <URL:http://www.sdvc.uwyo.edu/24k/bedgeol.html>geology

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -111.36

   East_Bounding_Coordinate: -104

   North_Bounding_Coordinate: 45.0

   South_Bounding_Coordinate: 41.0

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?

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):

      • string (60610)
      • 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 .001. Longitudes are given to the nearest .001. Latitude and longitude values are specified in Decimal Degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is GRS1980.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.2572221.
      

7. How does the data set describe geographic features?

   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.

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • U.S. Geological Survey

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

This geologic map was prepared as part of a study of digital methods and techniques as applied to complex geologic maps.

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 1)

   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.

3. What similar or related data should the user be aware of?

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.

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?

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?
   • Availability in digital form:

     Data format:	ARCE (Arc/Info export) (version 7.0.4) Size: 34.9
     Network links:	ftp.sdvc.uwyo.edu or <http://www.sdvc.uwyo.edu/clearinghouse>

   • Cost to order the data: none for on-line data

Dates:

Last modified: 23-Jan-1998

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)