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Digital geologic map of Spokane County and vicinity, Washington and Idaho

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:


What does this data set describe?

Title:
Digital geologic map of Spokane County and vicinity, Washington and Idaho
Abstract:
The geology of Spokane County and vicinity, Washington and Idaho was compiled from Carrara and others (1995), Joseph (1990), Kiver and others (1979), Miller (written communication, 1995), and Waggoner (1990a, b) 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 four major Arc/Info datasets: one line and polygon file (spokco) containing geologic contacts and structures (lines) and geologic map rock units (polygons), and three point files (spcopnt1, spcopnt2, and spcopnt3) containing structural point data.
  1. How should this data set be cited?

    Johnson, Bruce R., Derkey, Pamela D., Frost, Thomas P., Derkey, Robert E., and Lackaff, Beatrice B., 1998, Digital geologic map of Spokane County and vicinity, Washington and Idaho: U.S. Geological Survey Open-File Report 98-503, U.S. Geological Survey, Spokane WA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -118.0
    East_Bounding_Coordinate: -117.0
    North_Bounding_Coordinate: 48.125
    South_Bounding_Coordinate: 47.125

  3. What does it look like?

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

    Calendar_Date: 1998
    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 (1598)
      • String (4430)
      • GT-polygon composed of chains (1599)

    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

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest not determined
      Ordinates (y-coordinates) are specified to the nearest not determined
      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 Spokane County and vicinity, Washington and Idaho' Open-File Report 98-503 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, spokco.aat, that relates to the spokco.con (contact look-up table), spokco.str (structure look-up table), spokco.lgu (linear geologic unit look-up table) and spokco.ref (source reference look-up table) files; a rock unit polygon attribute table, spokco.pat, that relates to the spokco.ru (rock unit look-up table) and spokco.ref (source reference look-up table) files; and three geologic map symbol point attribute tables, spcopnt1.pat, spcopnt2.pat, and spcopnt3.pat, that relate to the *pnt*.sym (structural point data look-up tables) and *pnt*.ref (source reference look-up table) files for each of the 1:100,000 quadrangles used in the Spokane County digital compilation.
    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)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Pamela D Derkey
    U.S. Geological Survey, GEO-WRG-MRS
    W 904 Riverside Avenue
    Spokane, WA 99201
    USA

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


Why was the data set created?

This dataset was developed to provide a geologic map GIS of Spokane County for use in future spatial analysis by a variety of users. These data will better enable Spokane County agencies to predict the likely occurrence of additional mineral lands, primarily containing sand, gravel, rock and clay deposits.
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?

    Carrara and others, 1995 (source 1 of 9)
    Carrara, P.E., Kiver, E.P., and Stradling, D.F., 1995, Surficial geologic map of the Chewelah 30- x 60-minute quadrangle, Washington and Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-2472, U.S. Geological Survey.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 100,000
    Source_Contribution: This map was used in the map compilation.

    Derkey and others, 1998 (source 2 of 9)
    Derkey, P.D., Johnson, B.R., Lackaff, B.B., and Derkey, R.D., 1998, Digital geologic map of the Rosalia 1:100,000 quadrangle, Washington and Idaho: a digital database for the 1990 S.Z. Waggoner map: U.S. Geological Survey Open-File Report 98-357, U.S. Geological Survey.

    Online Links:

    Type_of_Source_Media:
    digital GIS served by the USGS on the World Wide Web
    Source_Scale_Denominator: 100,000
    Source_Contribution:
    These digital files were used in the digital map compilation.

    Johnson and Derkey, 1998 (source 3 of 9)
    Johnson, B.R., and Derkey, P.D., 1998, Digital geologic map of the Spokane 1:100,000 quadrangle, Washington and Idaho: a digital database for the 1990 N.L. Joseph map: U.S. Geological Survey Open-File Report 98-115, U.S. Geological Survey.

    Online Links:

    Type_of_Source_Media: digital GIS served by the USGS on the World Wide Web
    Source_Scale_Denominator: 100,000
    Source_Contribution:
    These digital files were used in the digital map compilation.

    Joseph, 1990 (source 4 of 9)
    Joseph, N.L., 1990, Geologic map of the Spokane 1:100,000 quadrangle, Washington and Idaho: U.S. Geological Survey Open-File Report 90-17, Washington Division of Geology and Earth Resources, Olympia, WA.

    Type_of_Source_Media: stable-base mylar
    Source_Scale_Denominator: 100,000
    Source_Contribution:
    This map was used by Johnson and Derkey (1998) to create a digital geologic map of the Spokane quadrangle.

    Kiver and others, 1979 (source 5 of 9)
    Kiver, E.P., Rigby, J.C., and Stradling, D.F., 1979, Surficial geologic map of the Spokane quadrangle, Washington: U.S. Geological Survey Open-File Report 79-11, Washington Division of Geology and Earth Resources.

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 100,000
    Source_Contribution: This map was used in the map compilation.

    Miller, written communication, 1995 (source 6 of 9)
    Miller, F.K., unpublished material, Geologic map of the Chewelah 30- by 60-minute quadrangle, Washington and Idaho.

    Type_of_Source_Media: stable-base greenline mylar
    Source_Scale_Denominator: 100,000
    Source_Contribution:
    This unpublished map was 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 Digital Line Graph, U.S. Geological Survey.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: 100,000
    Source_Contribution: This source provided digital hydrography.

    Waggoner, 1990a (source 8 of 9)
    Waggoner, S.Z., 1990, Geologic map of the Chewelah 1:100,000 quadrangle, Washington-Idaho: U.S. Geological Survey Open-File Report 90-14, Washington Division of Geology and Earth Resources, Olympia, WA.

    Type_of_Source_Media: stable-base mylar
    Source_Scale_Denominator: 100,000
    Source_Contribution: This map was used in the map compilation.

    Waggoner, 1990b (source 9 of 9)
    Waggoner, S.Z., 1990, Geologic map of the Rosalia 1:100,000 quadrangle, Washington-Idaho: U.S. Geological Survey Open-File Report 90-7, Washington Division of Geology and Earth Resources, Olympia, WA.

    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 100000
    Source_Contribution:
    This map was used by Derkey and others (1998) to create a digital geologic map of the Rosalia quadrangle.

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

    Date: 1995 (process 1 of 2)
    The digital geologic maps of the Spokane and Rosalia quadrangles (Johnson and Derkey, 1998 and Derkey and others, 1998) were edgematched in Arc/Info GIS. Linework for the Chewelah quadrangle was digitized from Miller (written communication, 1995), Carrara and others (1995) and Waggoner (1990a) and edgematched to the Spokane-Rosalia map. T.P. Frost and R.E. Derkey resolved mis-matches across the Chewelah-Spokane quadrangle boundary by checking the contacts in the field. Structural point data for the Chewelah quadrangle was digitized from Miller (written communication, 1995).

    Date: 15-Oct-1999 (process 2 of 2)
    Creation of original metadata record

    Person who carried out this activity:

    Pamela D Derkey
    U.S. Geological Survey, GEO-WRG-MRS
    W 904 Riverside Avenue
    Spokane, WA 99201
    USA

    509-368-3114 (voice)
    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 probably no better than +/- 70 meters. 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?

    This dataset was produced from previously published reports (Carrara and others, 1995; Derkey and others, 1998; Johnson and Derkey, 1998; Joseph, 1990; Kiver and others, 1979; and Waggoner, 1990a, b) and from unpublished field mapping by Miller (written communication, 1995). These sources are considered to be the best geologic maps available for the area at a scale of 1:100,000.

  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 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 Spokane County and vicinity, Washington adn 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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