Geologic and structure maps of the Kalispell 1:250,000 quadrangle, Montana, and Alberta and British Columbia: a digital database.

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

Frequently anticipated questions:

What does this data set describe?

Geologic and structure maps of the Kalispell 1:250,000 quadrangle, Montana, and Alberta and British Columbia: a digital database.
This dataset was digitized by the U.S. Geological Survey EROS Data Center and U.S. Geological Survey Spokane Field Office for input into an Arc/Info geographic information systsem (GIS). The digital geologic map database can be queried in many ways to produce a variety of derivative geologic maps.
This GIS dataset consists of one major Arc/Info dataset: a line and polygon file (kal250k) that contains geologic contacts and structures (lines) and geologic map rock units (polygons).
  1. How might this data set be cited?
    Harrison, J.E., Cressman, E.R., Whipple, J.W., Kayser, H.K., and Derkey, P.D., 2000, Geologic and structure maps of the Kalispell 1:250,000 quadrangle, Montana, and Alberta and British Columbia: a digital database.: U.S. Geological Survey Miscellaneous Investigations Series Map I-2267, U.S. Geological Survey, Denver, CO.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -116.00
    East_Bounding_Coordinate: -114.00
    North_Bounding_Coordinate: 49.00
    South_Bounding_Coordinate: 48.00
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2000
    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 (12246)
      • String (21022)
      • GT-polygon composed of chains (9580)
    2. What coordinate system is used to represent geographic features?
      The map projection used is Transverse Mercator.
      Projection parameters:
      Scale_Factor_at_Central_Meridian: 1.00000
      Longitude_of_Central_Meridian: -115
      Latitude_of_Projection_Origin: 0
      False_Easting: 0
      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?
    The 'Geologic map of the Kalispell 1°x2° quadrangle, Montana ...' Miscellaneous Investigations Series Map I-2267 contains a detailed description of each attribute code. The database includes a geologic linework arc attribute table, kal250k.aat, that relates to the kal250k.con (contact look-up table), kal250k.st2 (structure look-up table), kal250k.lgu (linear geologic unit look-up table), and kal250k.ref (source reference look-up table) files; a rock unit polygon attribute table, kal250k.pat, that relates to the (rock unit look-up table) and kal250k.ref (source reference look-up table) files.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Harrison, J.E.
    • Cressman, E.R.
    • Whipple, J.W.
    • Kayser, H.K.
    • Derkey, P.D.
  2. Who also contributed to the data set?
    Jack E. Harrison, Earle R. Cressman, James W. Whipple compiled the geology and published the original geologic paper map.
    EROS Data Center staff scanned/digitized geologic map and prepared the original ArcInfo data prior to 1994.
    Montana Bureau Mines and Geology acquired the original data and, in 1999, provided it to the USGS in Spokane, WA.
    R.J. Miller (USGS) converted the original data to a single topologically correct ArcInfo coverage.
    Helen Z. Kayser (contractor) attached and attributed an interim geologic map data model.
    Thomas P. Frost (USGS), Pamela D. Derkey (USGS), and William N. Kelley (contractor) visually compared the hard copy plots with the source documents;
  3. To whom should users address questions about the data?
    Pamela D. Derkey
    U.S. Geological Survey
    904 W. Riverside Ave., Rm. 202
    Spokane, WA

    1-509-368-3114 (voice)
    1-509-368-3199 (FAX)

Why was the data set created?

This dataset was developed to provide geologic map GIS of the Kalispell 1:250,000 quadrangle for use in the future spatial analysis by a variety of users.
This database is not meant to be used or displayed at any scale larger than 1:250,000 (e.g., 1:100,000 or 1:24,000).

How was the data set created?

  1. From what previous works were the data drawn?
    Harrison and others, 1992. (source 1 of 1)
    Harrison, Jack E., Cressman, Earle R., and Whipple, James W., 1992, Geologic and Structure Maps of the Kalispell 1°x2° Quadrangle, Montana, and Alberta and British Columbia.: U.S. Geological Survey Miscellaneous Investigations Series Map Map I-2267, U.S. Geological Survey, Denver, CO.

    Type_of_Source_Media: published paper map
    Source_Scale_Denominator: 250000
    These two maps were the only maps used to create the digital geologic map database.
  2. How were the data generated, processed, and modified?
    (process 1 of 3)
    The published paper geologic map was digitized by the EROS Data Center prior to 1994.
    Date: 1999 (process 2 of 3)
    The digital files were attributed by Helen Z. Kayser (contractor) at the USGS Spokane Field Office using an iterim geologic map data model. The data were checked for position by comparing plots of the digital data to the source.
    Date: 11-Oct-2000 (process 3 of 3)
    Creation of original metadata record Person who carried out this activity:
    U.S. Geological Survey
    Attn: Pamela D. Derkey
    904 West Riverside Avenue, Rm. 202
    Spokane, WA

    1-509-368-3114 (voice)
    1-509-368-3199 (FAX)
  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?
    +/-178 meters
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This digital geologic map is wholly derived from Harrison, and others (1992).
  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 do duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. All nodes are represented by a single coordinate pair which indicates the beginning or end of a line segment.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
This digital database is not meant to be used or displayed at any scale larger than 1:250,000 (e.g., 1:100,000 1:24,000).
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

  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 make 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 determined fitness for use lies 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 constite 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 the delivery, installation, operation, or support by the USGS.
    This digital geologic map database of the Kalispell 1:250,000 quadrangle is not meant to be used or displayed at any scale larger than 1:250,000 (e.g., 1:100,000 or 1:24,000)
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: Geologic units, structural features, and reference information in format ARCE (version 7.x) Size: 11.5
      Network links:
    • Cost to order the data: none

Who wrote the metadata?

Last modified: 10-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse,
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA

703-648-6533 (voice)
703-648-6252 (FAX)
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <>
Generated by mp version 2.9.48 on Tue Jul 03 20:04:47 2018