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Digital geologic map of the Wallace 1:100,000 quadrangle, Idaho

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Frequently anticipated questions:


What does this data set describe?

Title: Digital geologic map of the Wallace 1:100,000 quadrangle, Idaho
Abstract:
The geology of the Wallace 1:100,000 quadrangle, Idaho was compiled by Reed S. Lewis in 1997 and supplemented by field mapping by Reed S. Lewis, Russell F. Burmester, and Mark D. McFaddan in 1997 and 1998. The geologic map information was inked 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 (wa100k) containing geologic contacts and structures (lines) and geologic map rock units (polygons), and one point file (wapnt) containing structural data.
  1. How should this data set be cited?

    Lewis, Reed S., Burmester, Russell F., McFaddan, Mark D., Derkey, Pamela D., and Oblad, Jon R., 1999, Digital geologic map of the Wallace 1:100,000 quadrangle, Idaho: U.S. Geological Survey Open-File Report 99-390, 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: 47.50
    South_Bounding_Coordinate: 47.00

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 05-Aug-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 (491)
      • String (1562)
      • GT-polygon composed of chains (492)

    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
      False_Easting: 0.000
      False_Northing: -5000000

      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 the Wallace 1:100,000 quadrangle, Idaho' Open-File Report 99-390 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, wa100k.aat, that relates to the wa100k.con (contact look-up table), wa100k.str (structure look-up table), wa100k.lgu (linear geologic unit look-up table) and wa100k.ref (source reference look-up table) files; a rock unit polygon attribute table, wa100k.pat, that relates to the wa100k.ru (rock unit look-up table) and wa100k.ref (source reference look-up table) files; and a geologic map symbol point attribute table, wapnt.pat, that relates to the wapnt.sym (structural point data look-up tables) and wapnt.ref (source reference look-up table) files.
    Entity_and_Attribute_Detail_Citation:
    A detailed description of the items in the Wallace 100K GIS are given in the text of the Open-File Report 99-390 available in Adobe Acrobat PDF format at http://pubs.usgs.gov/of/1999/of99-390/OF99-390.PDF


Who produced the data set?

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

  2. Who also contributed to the data set?

    Reed S. Lewis, Russell F. Burmester and Mark D. McFadden compiled and mapped the geology onto stable-base material;
    Optronics Specialty Co., Inc. scanned the geologic map and provided minimally attributed Arc/Info interchange-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 99201
    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 Wallace 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?

    Harrison, unpublished field notes (source 1 of 9)
    Harrison, J.E., (unpublished), Unpublished geologic maps of the Bathtub Mountain 7.5-, Fishhook Creek 7.5-, Haugen 15-, Hoyt Mountain 7.5-, Montana Peak 7.5-, Monumental Buttes 7.5-, Saltese 15-, Thor Mountain 7.5-, Three Sisters 7.5-, Wallace 15- and Widow Mountain 7.5-minute quadrangles, Idaho: U.S. Geological Survey Field Records Library, Denver CO.

    Type_of_Source_Media: paper maps
    Source_Scale_Denominator: 24000 and 62500
    Source_Contribution: These field maps were used in the map compilation.

    Hietenan, 1963 (source 2 of 9)
    Hietenan, Anna, 1963, Anorthosite and associated rocks in the Boehls Butte quadrangle and vicinity, Idaho: U.S. Geological Survey Professional Paper 344-B, U.S. Geological Survey.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 48000
    Source_Contribution: This map was used in the map compilation.

    Hietenan, 1967 (source 3 of 9)
    Hietenan, Anna, 1967, Scapolite in the Belt Series in the St. Joe-Clearwater region, Idaho: Special Paper 86, Geological Society of America.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 48000
    Source_Contribution: These maps were used in the map compilation.

    Hietenan, 1968 (source 4 of 9)
    Hietenan, Anna, 1968, Belt Series in the region around Snow Peak and Mallard Peak, Idaho: U.S. Geological Survey Professional Paper 344-E, U.S. Geological Survey.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 48000
    Source_Contribution: These maps were used in the map compilation.

    Hietenan, 1984 (source 5 of 9)
    Hietenan, Anna, 1984, Geology along the northwest border zone of the Idaho batholith, northern Idaho: U.S. Geological Survey Bulletin 1608, U.S. Geological Survey.

    Type_of_Source_Media: paper map
    Source_Contribution: These figures were used in the map compilation.

    Hobbs and others, 1965 (source 6 of 9)
    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: 24000
    Source_Contribution: These maps were used in the map compilation.

    USGS, 1993 (source 7 of 9)
    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.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: 100000
    Source_Contribution:
    This source provided the eastern boundary of the map area (Idaho-Montana) boundary in a digital format.

    Vance, 1981 (source 8 of 9)
    Vance, R.B., 1981, Geology of the NW 1/4 of the Wallace 15-minute quadrangle, Shoshone County, Idaho: University of Idaho, Moscow, Idaho.

    Other_Citation_Details: M.S. thesis
    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 24000
    Source_Contribution: This map was used in the map compilation.

    Foster, 1983 (source 9 of 9)
    Foster, S.A., 1983, Structural analysis of the NE 1/4 fo the Wallace 15- minute quadrangle, Shoshone County, Idaho: University of Idaho M.S. thesis, 150 p.: University of Idaho.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 24000
    Source_Contribution: This map was used in the map compilation.

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

    Date: 1997 (process 1 of 5)
    Geologic map information primarily from Foster (1983), Harrison (1975?-1985?), Hietenan (1963, 1967, 1968, 1984), Hobbs and others (1965), and Vance (1981) were compiled on a stable-base copy of the USGS 1:100,000-scale topographic quadrangle map and manually labeled. Additional geology from field mapping efforts in 1997 was also incorporated onto the stable-base map.

    Person who carried out this activity:

    Reed S. Lewis
    Idaho Geological Survey
    geologist
    Idaho Geological Survey, University of Idaho
    Moscow, Idaho 83844
    USA

    1-208-885-7472 (voice)
    reedl@uidaho.edu

    Date: 1998 (process 2 of 5)
    Stable-base map was scanned and converted from a raster to a vector format (in scanner units).

    Date: 1998 (process 3 of 5)
    Digital files were transformed to UTM zone 11 (meters), with a RMS error (input,output) = (0.002, 6.148), and attributed using an interim geologic map data model. The data were checked for position by comparing plots of the digital data to the source.

    Date: 1999 (process 4 of 5)
    Senior author revised the geologic map based on mapping during the summer of 1998, and this information was incorporated into the digital map GIS.

    Date: 15-Oct-1999 (process 5 of 5)
    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 99201
    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 +/- 6 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?

    Geologic units were both compiled from previously existing geologic maps generally ranging in scale from 1:24,000 to 1:48,000 and mapped in the field at a scale of 1:24,000. Some small units and those obscured by dense forest cover may not be included in this dataset.

  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 poygon 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)

    USGS Information Services
    Box 25286
    Denver Federal Center
    Denver, CO 80225-0046
    USA

    1-888-ASK-USGS (voice)
    303-202-4693 (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 Wallace 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: 31-Jul-2014
Last Reviewed: 15-Oct-1999
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Geologist
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA 20192-0002
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov

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


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