Geologic Map of the Challis 1°x2° Quadrangle, Idaho

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Frequently anticipated questions:

What does this data set describe?

Title: Geologic Map of the Challis 1°x2° Quadrangle, Idaho
Abstract:
The paper version of The geology of the Challis 1°x2° quadrangle, was compiled by Fred Fisher, Dave McIntyre and Kate Johnson in 1992. The geology was compiled on a 1:250,000 scale topographic base map. TechniGraphic System, Inc. of Fort Collins Colorado digitized this map under contract for N.Shock. G.Green edited and prepared the Challis digital version for publication as a geographic information system database. The digital geologic map database can be queried in many ways to produce a variety of geologic maps.
  1. How might this data set be cited?
    Fisher, F.S., McIntyre, D.H., and Johnson, K.M., 1992, Geologic Map of the Challis 1°x2° Quadrangle, Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-1819, U.S. Geological Survey, Denver, Colorado.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -116.0
    East_Bounding_Coordinate: -114.0
    North_Bounding_Coordinate: 45.0
    South_Bounding_Coordinate: 44.0
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2000
    Currentness_Reference:
    publication date
  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?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      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:
    Polygons are given a general type and formation name; arcs are given a general type, dikes are also assigned a unit symbol. Points are given a general type. These values are currently listed in files *.tbl accompanying the ArcInfo interchange files.
    Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/imap/i-1819/data/

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • F.S. Fisher
    • D.H. McIntyre
    • K.M. Johnson
  2. Who also contributed to the data set?
    Fred Fisher, Dave McIntyre and Kate Johnson (all USGS) compiled the geology onto stable-base material at a 1:250,000. That version was published as USGS publication MAP I-1819. TechniGraphic System, Inc. of Fort Collins Colorado digitized that map for the USGS in 1999 under contract for N.Shock (USGS). G.Green (USGS) edited and prepared for digital release the Challis digital version as a geographic information system database. The digital geologic map database can be queried in many ways to produce a variety of geologic maps. The files are stored in the following projection - UTM, meters, zone 11, NAD27, Clarke 1866.
  3. To whom should users address questions about the data?
    Gregory N. Green
    U.S. Geological Survey
    geologist
    MS 905, USGS, Denver Federal Center
    Denver, CO
    USA

    (303) 236-5390 (voice)
    ggreen@usgs.gov

Why was the data set created?

This dataset was developed to provide a geologic map GIS database of Challis 1°x2° Quadrangle, Idaho for use in spatial analysis.

How was the data set created?

  1. From what previous works were the data drawn?
    Fisher and others (1992) (source 1 of 1)
    Fisher, F.S., McIntyre, D.H., and Johnson, K.M., 1992, Geologic Map of the Challis 1°x2° Quadrangle, Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-1819, U.S. Geological Survey, Denver, Colorado, USA.

    Type_of_Source_Media: stable-base material clear films from orginals
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Fred Fisher, Dave McIntyre and Kate Johnson compiled the geology of the Challis 1x2 quadrangle and published it in 1992. Some of the geologists who have worked on the Challis 1x2 quadrangle included Ben Leonard, Bart Ekren, Dick Hardyman, Betty Skipp, Paul Simms, Thor Kiilsgaard and Reed Lewis. Published and unpublished sources for the compilation are included in the paper text. Nancy Shock was responsible for creating the digital product. Gregory N. Green did the final assembly for digital publication.
  2. How were the data generated, processed, and modified?
    Date: 2000 (process 1 of 2)
    Clear film positives of the 1:250,000-scale geologic map compilation were electronically scanned to create raster images, converted to vector, polygon, and point GIS layers, and attributed by the contractor Techni Graphics Systems, Inc. of Fort Collins Colorado. At the USGS these files were further attributed, edited, and compared to the original film positives to check for digitizing and attributing errors. Corrections were made as needed.
    Date: 15-May-2000 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    U.S. Geological Survey
    Attn: Gregory N. Green
    MS 905, USGS, Denver Federal Center
    Denver, CO
    USA

    (303) 236-5390 (voice)
    ggreen@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 orginals

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 database 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)
    U.S. Geological Survey
    USGS Information Services
    PO Box 25286, Denver Federal Center
    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? U.S. Geological Survey Miscellaneous Investigations Series Map I-1819
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey (USGS) editorial standard nor with the North American stratigraphic codes. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the USGS. Although these data have been used by the USGS and have been successfully imported into data base programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. This data base GIS 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 units and structural features in format ArcInfo interchange (version 7.1.2) Size: 10
      Network links: http://pubs.usgs.gov/imap/i-1819/challis.tar
    • Cost to order the data: none

Who wrote the metadata?

Dates:
Last modified: 14-Jun-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)
This page is <https://geo-nsdi.er.usgs.gov/metadata/map-i/1819/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:04:47 2018