Geologic map of the Dillon 1°x2° quadrangle, Idaho and Montana

Frequently anticipated questions:

• What does this data set describe?
  1. How might 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?

What does this data set describe?

1. How might this data set be cited?
   Ruppel, Edward T., O'Neill, J. Michael, and Lopez, David A., 1993, Geologic map of the Dillon 1°x2° quadrangle, Idaho and Montana: U.S. Geological Survey Miscellaneous Investigations Series Map I-1803-H, U.S. Geological Survey, Denver, Colorado.

   Online Links:

   • http://pubs.usgs.gov/imap/i-1803-h/

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -114.0
   East_Bounding_Coordinate: -112.0
   North_Bounding_Coordinate: 46.0
   South_Bounding_Coordinate: 45.0
   

3. What does it look like?
4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 1997

   Currentness_Reference:

   dataset completion

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: map
   

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.
   2. What coordinate system is used to represent geographic features?
      The map projection used is Transverse Mercator.
      

      Projection parameters:

      Scale_Factor_at_Central_Meridian: 1
      Longitude_of_Central_Meridian: -113.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 0
      False_Northing: 0
      

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 1
      Ordinates (y-coordinates) are specified to the nearest 1
      Planar coordinates are specified in Meters
      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 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
      
7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview: formation name and line type
   Entity_and_Attribute_Detail_Citation: none
   

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Edward T. Ruppel
   • J. Michael O'Neill
   • David A. Lopez
2. Who also contributed to the data set?

   Edward T. Ruppel, J. Michael O'Neill, and David A. Lopez

3. To whom should users address questions about the data?
   J. Michael O'Neill

   U.S. Geological Survey

   Geologist

   MS 905, USGS, Denver Federal Center

   Denver, CO
   

   USA

   (303) 236-1288 (voice)

   joneill@usgs.gov

Why was the data set created?

This GIS database was prepared to provide digital geologic coverage for the Dillon 1 degree by 2 degree quadrangle of southwest Montana and east-central Idaho.

How was the data set created?

1. From what previous works were the data drawn?

   Geologic map of the Dillon quadrangle, Ruppel and others, 1993 (source 1 of 1)

   Ruppel, E.T., O'Neill, J.M., and Lopez, D.A., 1993, Geologic map of the Dillon 1°x2° quadrangle, Idaho and Montana: U.S. Geological Survey Miscellaneous Investigations Series Map I-1803-H, U.S. Geological Survey, Denver, Colorado.

   Type_of_Source_Media: paper and original greenline mylar
   Source_Scale_Denominator: 250000
   Source_Contribution: New and compiled geologic mapping
   

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

   Date: 1997 (process 1 of 2)

   The original base materials used to create U.S. Geologic Survey (USGS) Map I-1803-H were digitized by staff of the USGS EROS Data Center in Sioux Falls, South Dakota. These digital files were transferred to the Montana Bureau of Mines and Geology (MBMG) in Butte, Montana. In 1997 the USGS contracted the GIS staff of the MBMG at Butte to assemble and attribute this digital geology in ARC/INFO format. The goal was to create an exact digital reproduction of Map I-1803-H in ARC/INFO format data coverages. The MBMG completed the scanning, digital registration, and rectification of differences with the published paper map on 02/25/97. The resulting ARC/INFO datafiles were transferred from the MBMG to the USGS for review on 06/06/97. These files were manually proofed against the original published paper map by Bradley S. Van Gosen of the USGS in Denver. Final edits were completed at the GIS department of the MBMG in July 1997. The final ARC/INFO files were transferred to the USGS on 6/29/98. These ARC/INFO datafiles are provided in this website directory for public use in spatial analysis.

   Date: 16-Dec-1999 (process 2 of 2)

   Creation of original metadata record Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: J. Micheal O'Neill

   MS 905, USGS, Denver Federal Center

   Denver, CO
   

   USA

   (303) 236-1288 (voice)

   joneill@usgs.gov

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?
   finished
5. How consistent are the relationships among the observations, including topology?
   manual check against originals

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:

This geologic map is not meant to be used or displayed at any scale other than 1:250,000.

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

   USGS Information Services

   Box 25286

   Denver, CO
   

   USA

   1-888-ASK-USGS (1-888-275-8747) (voice)

   ask@usgs.gov
2. What's the catalog number I need to order this data set? USGS Miscellaneous Investigations Series Map I-1803-H
3. What legal disclaimers am I supposed to read?

   This map is not meant to be used or displayed at any scale other than 1:250,000.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Geologic map of the Dillon 1 degree by 2 degree quadrangle, Idaho and Montana in format ARCE (version 7.1.1) Size: 7.1
     Network links:	http://pubs.usgs.gov/imap/i-1803-h/

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 05-Feb-2016

Metadata author:

Peter N Schweitzer

USGS Midwest Area

Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/

Mail Stop 954

12201 Sunrise Valley Dr

Reston, VA

USA

703-648-6533 (voice)

703-648-6252 (FAX)

pschweitzer@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)