Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho

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Frequently anticipated questions:

What does this data set describe?

Title:
Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho
Abstract:
The geology of the Thompson Falls 1:100,000 quadrangle, Idaho was compiled by Reed S. Lewis in 1997 onto a 1:100,000-scale topographic base map for input into an Arc/Info geographic information system (GIS). The digital geologic map database can be queried in many ways to produce a variety of derivative geologic maps.
Supplemental_Information:
This GIS consists of two major Arc/Info datasets: one line and polygon file (tf100k) containing geologic contacts and structures (lines) and geologic map rock units (polygons), and one point file (tfpnt) containing structural data.
  1. How might this data set be cited?
    Lewis, Reed S., and Derkey, Pamela D., 1999, Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho: U.S. Geological Survey Open-File Report 99-438, U.S. Geological Survey, Spokane WA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -116.0
    East_Bounding_Coordinate: -115.0
    North_Bounding_Coordinate: 48.00
    South_Bounding_Coordinate: 47.50
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1999
    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. It contains the following vector data types (SDTS terminology):
      • Point (230)
      • String (744)
      • GT-polygon composed of chains (231)
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Planar coordinates are encoded using coordinate pair
      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:
    The 'Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho' Open-File Report 99-438 contains a detailed description of each attribute code and a reference to the associated map symbols on the map source materials. The GIS includes a geologic linework arc attribute table, tf100k.aat, that relates to the tf100k.con (contact look-up table), tf100k.str (structure look-up table), and tf100k.ref (source reference look-up table) files; a rock unit polygon attribute table, tf100k.pat, that relates to the tf100k.ru (rock unit look-up table) and tf100k.ref (source reference look-up table) files; and a geologic map symbol point attribute table, tfpnt.pat, that relates to the tfpnt.sym (structural point data look-up tables) and tfpnt.ref (source reference look-up table) files.
    Entity_and_Attribute_Detail_Citation:
    A detailed description of the items in the Thompson Falls 100K GIS is given in the text of the Open-File Report 99-348 available in Adobe Acrobat PDF format on the World Wide Web at http://pubs.usgs.gov/of/1999/0438/pdf/OF99-438.PDF

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Reed S. Lewis
    • Pamela D. Derkey
  2. Who also contributed to the data set?
    Reed S. Lewis (contractor) compiled the geology onto stable-base material; Optronics Specialty Co., Inc. scanned the geologic map and provided minimally attributed Arc/Info EXPORT-format files to the USGS; Pamela D. Derkey (USGS) imported the files, transformed them to UTM zone 11 (with a y-shift) and attached and attributed an interim geologic map data model; Thomas P. Frost (USGS) visually compared the hard copy plots with the source; Jon R. Oblad (EWU) annotated the point data for output at a scale of 1:100,000.
  3. To whom should users address questions about the data?
    Pamela D. Derkey
    U.S. Geological Survey
    geologist
    904 W. Riverside Ave., Rm. 202
    Spokane, WA
    USA

    1-509-368-3114 (voice)
    1-509-368-3199 (FAX)
    pderkey@usgs.gov

Why was the data set created?

This dataset was developed to provide geologic map GIS of the Idaho portion of the Thompson Falls 1:100,000 quadrangle for use in future spatial analysis by a variety of users.
This database is not meant to be used or displayed at any scale larger than 1:100,000 (e.g., 1:62,500 or 1:24,000).

How was the data set created?

  1. From what previous works were the data drawn?
    Griggs, unpublished field notes (source 1 of 10)
    Griggs, A.B., not published, Unpublished geologic maps of the Bloom Peak 7.5-, Burke 15-, Cooper Gulch 15-, Gem Peak 7.5-, Noxon 7.5- and Taylor Peak 7.5-minute quadrangles, Idaho: U.S. Geological Survey Field Records Library, Denver CO.

    Type_of_Source_Media: paper maps
    Source_Scale_Denominator: 24,000
    Source_Contribution: These field maps were used in the map compilation.
    Harrison and others, 1986 (source 2 of 10)
    Harrison, J.E., Griggs, A.B., and Wells, J.D., 1986, Geologic and structure maps of the Wallace 1- by 2-degree quadrangle, Montana and Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-1509A, U.S. Geological Survey.

    Type_of_Source_Media: paper maps
    Source_Scale_Denominator: 250,000
    Source_Contribution: This map was used in the map compilation.
    Hobbs and others, 1965 (source 3 of 10)
    Hobbs, S.W., Griggs, A.B., Wallace, R.E., and Campbell, A.B., 1965, Geology of the Coeur d'Alene district: U.S. Geological Survey Professional Paper 478, U.S. Geological Survey.

    Type_of_Source_Media: paper maps
    Source_Scale_Denominator: 24,000
    Source_Contribution: These maps were used in the map compilation.
    Hosterman, 1956 (source 4 of 10)
    Hosterman, J.W., 1956, Geology of the Murray area, Shoshone County, Idaho: U.S. Geological Survey Bulletin 1027-P, U.S. Geological Survey.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 62,500
    Source_Contribution: This map was used in the map compilation.
    Gibson and others, 1941 (source 5 of 10)
    Gibson, Russell, Jenks, W.F., and Campbell, Ian, 1941, Stratigraphy of the Belt series in Libby and Trout Creek quadrangles, northwestern Montana and northern Idaho: Geological Society of America Bulletin vol. 52, no. 3, Geological Society of America.

    Other_Citation_Details: pp. 363-379
    Type_of_Source_Media: paper maps?
    Source_Scale_Denominator: 180,000
    Source_Contribution:
    This source was used as a secondary source in compiling the geologic map.
    Ransome and Calkins, 1908 (source 6 of 10)
    Ransome, F.L., and Calkins, F.C., 1908, The geology and ore deposits of the Coeur d'Alene district, Idaho: U.S. Geological Survey Professional Paper 62, U.S. Geological Survey.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 62,500
    Source_Contribution: This map was used in the map compilation.
    Schalck, 1989 (source 7 of 10)
    Schalck, D.K., 1989, The geology and alteration of the Gem stocks, Shoshone County, Idaho: in V.E. Chamberlain, R.M. Breckenridge, and Bill Bonnichsen (editors), Guidebook to the geology of northern and western Idaho and surrounding area: U.S. Geological Survey Bulletin 28, Idaho Geological Survey, Moscow, Idaho.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: unknown
    Source_Contribution:
    This source was used as a secondary source in compiling the geologic map.
    USGS, 1993 (source 8 of 10)
    U.S. Geological Survey, 1993, 1:100,000-scale digital line graph (DLG) data - hydrography and transportation, Area 13 -- Northwestern states: U.S. Geological Survey Digital Line Graph, U.S. Geological Survey.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: 100,000
    Source_Contribution:
    This source provided the eastern boundary of the map area (Idaho-Montana) boundary in a digital format.
    Shenon, 1938 (source 9 of 10)
    Shenon, P.J., 1938, Geology and ore deposits near Murray, Idaho: Pamphlet 47, Idaho Bureau of Mines and Geology, Moscow, Idaho.

    Type_of_Source_Media: paper map?
    Source_Scale_Denominator: unknown
    Source_Contribution:
    This source was used as a secondary source in compiling the geologic map.
    Umpleby and Jones, 1923 (source 10 of 10)
    Umpleby, J.B., and Jones, E.L., Jr., 1923, Geology and ore deposits of Shoshoe County, Idaho: U.S. Geological Survey Bulletin 732, U.S. Geological Survey.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 250,000
    Source_Contribution:
    This secondary source provided additional information in compiling the geologic map.
  2. How were the data generated, processed, and modified?
    Date: 1998 (process 1 of 2)
    Geologic map information from source maps were reduced to a scale of 1:100,000 using a copy machine, then manually compiled onto a stable-base copy of the USGS 1:100,000-scale topographic quadrangle map and manually labeled.
    Date: 15-Oct-1999 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    U.S. Geological Survey
    Attn: Pamela D. Derkey
    geologist
    904 West Riverside Avenue, Rm. 202
    Spokane, WA
    USA

    1-509-368-3114 (voice)
    1-509-368-3199 (FAX)
    pderkey@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?
    Attribute accuracy was verified by manual comparison of the source with hard copy printouts and plots.
  2. How accurate are the geographic locations?
    The horizontal positional accuracy for the digital data is no better than +/- 7 meters based on the transformation RMS error. It was tested by visual comparison of the source with hard copy plots.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    All geologic units were compiled from previously existing geologic maps ranging in scale from 1:24,000 to 1:250,000.
  5. How consistent are the relationships among the observations, including topology?
    Polygon and chain-node topology present. Polygons intersecting the neatline are closed along the border. Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. Line segments are a set of sequentially numbered coordinate pairs. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. Point data are represented by two sets of coordinate pairs, each with the same coordinate values. All nodes are represented by a single coordinate pair which indicates the beginning or end of a line segment. The neatline was generated by mathematically generating the four sides of the quadrangle, densifying the lines of latitude and projecting the file to UTM zone 11 (with a y-shift).

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 digital database is not meant to be used or displayed at any scale larger than 1:100,000 (e.g., 1:62,500 or 1:24,00).
Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey Information Services
    Open-File Reports, Box 25286
    Denver, CO
    USA

    1-303-202-4200 (voice)
    1-303-202-4695 (FAX)
  2. What's the catalog number I need to order this data set?
  3. What legal disclaimers am I supposed to read?
    The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
    In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS.
    This digital geologic map GIS of the Thompson Falls 1:100,000 quadrangle, Idaho, is not meant to be used or displayed at any scale larger than 1:100,000 (e.g., 1:62,500 or 1:24,000).
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 10-Jun-2016
Last Reviewed: 15-Oct-1999
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-OO1-1998)
This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/99-438/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:07:21 2018