Geologic map of the Stillwater Complex, Montana: scanned source map images

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Frequently anticipated questions:


What does this data set describe?

Title:
Geologic map of the Stillwater Complex, Montana: scanned source map images
Abstract:
This collection of four georeferenced MrSID files and one TIFF file provides raster images of the five map sheets comprising the Geologic map of the Stillwater Complex, Montana by Page and Nokleberg (1974). Paper copies of the four geologic map sheets and the explanation were scanned, and the geologic map sheets were georeferenced to the Montana State Plane South coordinate system.
Supplemental_Information:
Each georeferenced MrSID image consists of a package of three files with the extensions: sid, .sdw (MrSID world file), and .aux (ArcInfo 8.1 georeferencing information).
The MrSID and TIFF files are listed below:
i797origs1.sid/.sdw/.aux - Sheet 1 - east end of the Stillwater Complex
i797origs2.sid/.sdw/.aux - Sheet 2 - east central part of the Stillwater Complex
i797origs3.sid/.sdw/.aux - Sheet 3 - west central part of the Stillwater Complex
i797origs4.sid/.sdw/.aux - Sheet 4 - west end of the Stillwater Complex
i797origs5.tif - Sheet 5 - explanation of map symbols, correlation of map units and map unit descriptions used on Sheets 1 through 4.
  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: scanned source map images: 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: 1974
    Currentness_Reference:
    publication date of original map
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: raster digital data
  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.
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: State Plane Coordinate System 1927
      State_Plane_Coordinate_System:
      SPCS_Zone_Identifier: 2503
      Lambert_Conformal_Conic:
      Standard_Parallel: 44.866667
      Standard_Parallel: 46.40
      Longitude_of_Central_Meridian: -109.5
      Latitude_of_Projection_Origin: 44
      False_Easting: 2000000.0
      False_Northing: 0.0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.001190
      Ordinates (y-coordinates) are specified to the nearest 0.001190
      Planar coordinates are specified in survey feet
      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?
    R.J. Miller scanned printed paper copies of the map sheets (Page and Nokleberg, 1974) and then georeferenced them to the Montana State Plane South coordinate system to create GeoTIFF files for the geologic map sheets.
    The GeoTIFF files were then compressed into MrSID images.
  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 set of images was developed to provide georeferenced digital images of the 1:12000-scale geologic map (Page and Nokleberg, 1974) These images can be used in conjunction with the vector data files now available as part of the I-797 dataset. This database 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?
    Page and Nokleberg, 1974 (source 1 of 1)
    Page, N.J, and Nokleberg, W.N., 1974, Geologic map of the Stillwater Complex, Montana: U.S. Geological Survey Miscellaneous Investigations Map I-797, U. S. Geological Survey, Reston, Virginia.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 12000
    Source_Contribution:
    The maps in this publication were the only maps used to create the MrSID and TIFF images.
  2. How were the data generated, processed, and modified?
    Date: 2002 (process 1 of 2)
    R.J. Miller scanned printed paper geologic map sheets at 400 dpi on a Contex Ideal FSC-8000 color scanner. The Ideal scanner is capable of scanning at 400 dpi native resolution without utilizing interpolation. The scans were made as index color TIFF files allowing 256 colors. The images converted to a compressed TIFF format using ArcInfo 8.1, then registered using ArcMAP 8.1.
    The GeoTIFF files were further compressed into MrSID file format.
    Date: 29-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?
    The images were compared visually with hard copy printed sheets to assure that features were legible.
  2. How accurate are the geographic locations?
    The images were georeferenced after establishing a series of links. A link is defined by 1) selecting an intersection of easting and northing lines shown on the basemap of the image, 2) linking that point with a calculated position (Montana State Plane South coordinate system.
    The horizontal positional accuracy for the four registered images is as follows:
    Sheet 1: root mean square (RMS) error = 6.8 ft using 22 links,
    Sheet 2: root mean square (RMS) error = 16.9 ft using 32 links,
    Sheet 3: root mean square (RMS) error = 8.2 ft using 17 links,
    Sheet 4: root mean square (RMS) error = 5.8 ft using 24 links. The relatively large error in registering sheet 2 may be due to in part to a splice in the basemap used for this sheet. The splice has a NNE trend and occurs near the center of the sheet.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    The five sheets comprising the printed (1974) version of Map I-797 have been scanned and are presented in their entirety at a scale of 1:12000.
  5. How consistent are the relationships among the observations, including topology?

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 1:12,000. 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 digital geologic map GIS of the Stillwater Complex, 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: 13-Jun-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/source.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:04:58 2018