Digital geologic map of the Coeur d'Alene 1:100,000 quadrangle, Idaho and Montana

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Frequently anticipated questions:


What does this data set describe?

Title:
Digital geologic map of the Coeur d'Alene 1:100,000 quadrangle, Idaho and Montana
Abstract:
The digital geologic map of the Coeur d'Alene 1:100,000 quadrangle was compiled from preliminary digital datasets [Athol, Coeur d'Alene, Kellogg, Kingston, Lakeview, Lane, and Spirit Lake 15-minute quadrangles] prepared by the Idaho Geological Survey from A. B. Griggs (unpublished field maps), supplemented by Griggs (1973) and by digital data from Bookstrom and others (1999) and Derkey and others (1996). 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 (cda100k) containing geologic contacts and structures (lines) and geologic map rock units (polygons), and one point file (cda100kp) containing structural data.
  1. How might this data set be cited?
    Munts, Steven R., 2000, Digital geologic map of the Coeur d'Alene 1:100,000 quadrangle, Idaho and Montana: U.S. Geological Survey Open-File Report OF00-135, U. S. Geological Survey, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -117.00
    East_Bounding_Coordinate: -116.00
    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: 05-Oct-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. It contains the following vector data types (SDTS terminology):
      • Point (1410)
      • String (5291)
      • GT-polygon composed of chains (1411)
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 11
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -117
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000
      False_Northing: 0.0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000000028834
      Ordinates (y-coordinates) are specified to the nearest 0.000000028834
      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 the Coeur d'Alene 1:100,000 quadrangle, Idaho and Montana' Open-File Report 00-135 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, cda100k.aat, that relates to the cda100k.con (contact look-up table), cda100k.st2 (structure look-up table), and the cda100k.ref (source reference look-up table) files; a rock unit polygon attribute table, cda100k.pat, that relates to the cda100k.ru (rock unit look-up table) and cda100k.ref (source reference look-up table) files; and a geologic map symbol point attribute table, cda100kp.pat, that relates to the cda100kp.sym (structural point data look-up tables) and cda100kp.ref (source reference look-up table) files.
    Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/of/2000/0135/pdf/of00-135.pdf

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Steven R. Munts
  2. Who also contributed to the data set?
    Allan B. Griggs (1973) mapped the Spokane quadrangle (1:250,000) from which the northeast corner 15-minute map segment was digitized; the Idaho Geological Survey provided digital geologic data coverage for the seven other 15-minute quadrangles used to prepare this composite map; Pamela D. Derkey and Robert J. Miller (both of the USGS) provided technical assistance with the geologic systems data model, metadata, digital documentation, and map projections; Steven R. Munts (contractor) digitized new linework, edited digital files, combined existing data sets, built look-up tables, and prepared the composite data set.
  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 Coeur d'Alene 1:100,000 quadrangle for use in future spatial analysis by a variety of users. These data can be printed in a variety of ways to display various geologic features or used for digital analysis and modeling. 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 (1973) (source 1 of 4)
    Griggs, A.B., 1973, Geologic map of the Spokane quadrangle, Washington, Idaho, and Montana: U.S. Geological Survey Geologic Investigations Series Map I-768, U.S. Geological Survey, Denver, CO.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Geology was digitized from the northeast part of this map source. Map units used in OF00-135 were described in Griggs (1973).
    Griggs, unpublished field notes (source 2 of 4)
    Griggs, A. B., unpublished, Unpublished geologic maps of the Athol, Coeur d'Alene, Kellogg, Kingston, Lakeview, Lane, and Spirit Lake 15-minute quadrangles, Idaho.: U.S. Geological Survey Field Records Library, Denver, CO.

    Type_of_Source_Media: paper maps
    Source_Scale_Denominator: 62500
    Source_Contribution:
    These seven field maps were digitized by the Idaho Geological Survey and used in the map compilation.
    Bookstrom and others, 1999 (source 3 of 4)
    Bookstrom, A. A., Box, S. E., Jackson, B. L., Brandt, T. R., Derkey, P. D., and Munts, S. R., 1999, Digital map of surficial geology, wetlands, deepwater habitats, Coeur d'Alene River valley, Idaho: U.S. Geological Survey Open-File Report OFR 99-548, U.S. Geological Survey, Denver, CO.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: 24000
    Source_Contribution:
    This source provided contacts between the surficial units with the bedrock units in the lower Coeur d'Alene River area.
    Derkey and others, 1996 (source 4 of 4)
    Derkey, P.D., Johnson, B.R., and Carver, Michael, 1996, Digital geologic map of the Coeur d'Alene district, Idaho and Montana: U.S. Geological Survey Open-File Report OFR 96-299, U.S. Geological Survey, Menlo Park, CA.

    Type_of_Source_Media: digital files
    Source_Scale_Denominator: 24000
    Source_Contribution:
    This source provided digital geology for the southeast part of the Coeur d'Alene 1:100,000 quadrangle.
  2. How were the data generated, processed, and modified?
    Date: 1999 (process 1 of 2)
    Preliminary digital geologic map information for seven 15-minute quadrangles obtained from the Idaho Geological Survey were compiled electronically into a single topologically correct coverage by R. J. Miller (USGS) using ARC/INFO ver. 7.2.1 on a Sun Unix system.
    S. R. Munts digitized the northeast corner part of Griggs's (1973) map plate on an Altek digitizing tablet (RMS input error = 0.002 [13 meters]) and incorporated the data into the Coeur d'Alene GIS.
    S. R. Munts projected the Coeur d'Alene GIS to UTM zone 11 (meters) and attributed it with an interim geologic data model.
    Digital data from Bookstrom and others (1999) was generalized and inserted into the Coeur d'Alene GIS to replace Griggs' unpublished field map data.
    Digital data from Derkey and others (1996) was inserted into the southeast part of the Coeur d'Alene 1:100,000 quadrangle.
    Date: 30-Nov-2000 (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 comparision of the source with hard copy printouts, plots, and on-screen evaluation.
  2. How accurate are the geographic locations?
    The horizontal position accuracy for the digital data is no better than 13 meters based on the digitizing RMS error.
  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 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. 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 coordiante 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 coordiante 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).
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 US 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)
  2. What's the catalog number I need to order this data set? USGS Open-File Report 00-135
  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 fitmess 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 Coeur d'Alene 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: 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)

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/00-135/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:05:22 2018