Geologic map of the Stillwater Complex, Montana: topographic base map image

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Frequently anticipated questions:


What does this data set describe?

Title:
Geologic map of the Stillwater Complex, Montana: topographic base map image
Abstract:
Four film positives of topography [which was prepared in 1943 and subsequently used by Page and Nokleberg (1974) for a base map for the geology of the Stillwater Complex, Montana] were scanned, and the resulting TIFF images were then geoferenced, rectified, and spliced together to create i797base.tif.
  1. How might this data set be cited?
    Page, Norman J, Nokleberg, Warren J., and Miller, Robert J., 2002, Geologic map of the Stillwater Complex, Montana: topographic base map image: U.S. Geological Survey Miscellaneous Investigations Series Map I-797, U. S. Geological Survey, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -110.247638
    East_Bounding_Coordinate: -109.736573
    North_Bounding_Coordinate: 45.520307
    South_Bounding_Coordinate: 45.327177
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1943
    Currentness_Reference:
    Date that topographic map was created.
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map image
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Raster data set. It contains the following raster data types:
      • Dimensions 7321 x 13347, type Pixel
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: State Plane Coordinate System
      State_Plane_Coordinate_System:
      SPCS_Zone_Identifier: 2503
      Lambert_Conformal_Conic:
      Standard_Parallel: 44.866667
      Standard_Parallel: 46.4
      Longitude_of_Central_Meridian: -109.5
      Latitude_of_Projection_Origin: 44.0
      False_Easting: 2000000.0
      False_Northing: 0.0
      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 10.36
      Ordinates (y-coordinates) are specified to the nearest 10.36
      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 1/294.978698.
  7. How does the data set describe geographic features?

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Norman J Page
    • Warren J. Nokleberg
    • Robert J. Miller
  2. Who also contributed to the data set?
    Abadan Reprographics & Imaging, Spokane Washington, scanned four film positives of topographic maps generated in 1943 by the USGS. Jeremy Larsen (Eastern Washington University) georeferenced and rectified the resulting TIFF images. Robert J. Miller then merged the four TIFF images into a single image, i797base.tif.
  3. To whom should users address questions about the data?
    Robert J Miller
    U.S. Geological Survey, GEO-WRG-MRS
    Mail Stop 901
    345 Middlefield Rd
    Menlo Park, CA
    USA

    650-329-5407 (voice)
    650-329-5490 (FAX)
    rjmiller@usgs.gov

Why was the data set created?

This image was prepared for archival purposes and is not meant to be used or displayed at any scale larger than 1:12000 (for example. 1:2000).

How was the data set created?

  1. From what previous works were the data drawn?
    (source 1 of 1)
    U.S. Geological Survey, 1943, 1943 topographic base map for the Stillwater Complex and adjacent area, Montana, scale 1:12000.: U.S. Geological Survey.

    Other_Citation_Details: source not formally published
    Type_of_Source_Media: film positive
    Source_Scale_Denominator: 12000
    Source_Contribution:
    The topography created by the USGS in 1943 is the sole source of data in this image, i797base.tif.
  2. How were the data generated, processed, and modified?
    Date: 2001 (process 1 of 2)
    Low resolution scans (100 dpi) of portions of the basemap were georeferenced and converted to ArcInfo grids. The grids were clipped and merged into a single file then saved in a TIFF format. Person who carried out this activity:
    Robert J Miller
    U.S. Geological Survey, GEO-WRG-MRS
    Mail Stop 901
    345 Middlefield Rd
    Menlo Park, CA
    USA

    650-329-5407 (voice)
    650-329-5490 (FAX)
    rjmiller@usgs.gov
    Date: 08-Mar-2002 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Robert J Miller
    U.S. Geological Survey, GEO-WRG-MRS
    Mail Stop 901
    345 Middlefield Rd
    Menlo Park, CA
    USA

    650-329-5407 (voice)
    650-329-5490 (FAX)
    rjmiller@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?
  2. How accurate are the geographic locations?
    The individual scanned images of parts of the basemap typically had an RMS error of approximately 3 meters. However, where parts of the georeferenced scans overlap, local shifts of up 15 meters were noted.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    The scanned image is an accurate representation of the original (1943) film positives.
  5. How consistent are the relationships among the observations, including topology?
    The topography in the scanned image matches fairly well with the topography in the scanned images of the Page and Nokleberg map (1974) and with the geology portrayed in i797.e00 (Page and others, 2002).

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 georeferenced image is not meant to be used or displayed at any scale larger than 1:12000 (for example, 1:6000).
Any hardcopies utilizing these data 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 this data set, nor to imply the U.S. Geological Survey approved changes the user has made.
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS Information Services
    Box 25286 Denver Federal Center
    Denver, CO
    USA

    1-888-ASK-USGS (voice)
    303-202-4693 (FAX)
    ask@usgs.gov
  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 georeferenced image of topography for the Stillwater Complex area, Montana, is not meant to be used or displayed at any scale larger than 1:12000 (for example, 1:2000).
  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/map-i/797/topobase.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:04:58 2018