Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Kentucky faults

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

Frequently anticipated questions:

What does this data set describe?

Title:
Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Kentucky faults
Abstract:
This data is from the fault printing separate used in publishing the 1988 Geologic Map of Kentucky. Separates for geology, surface faults, and cultural features were scanned and sent via email from U. S. Geological Survey, Reston, VA. The scanned data was converted to a ARC/INFO georeferenced cover.
Our intent is to show the overall fault pattern, and to show the locations of the main exposed and near-surface faults for comparison to deep subsurface structures. We made little attempt to edit details of the digitized faults, beyond adding tic marks to indicate dip directions of a few normal faults. For details such as exact locations, fault dips, separations, and cross-cutting relations, users should consult the original geologic map and the more detailed maps from which it was compiled.
  1. How might this data set be cited?
    Rhea, Susan, 1997, Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Kentucky faults: U.S. Geological Survey Open-File Report 97-0681, U.S. Geological Survey, Denver.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -89
    East_Bounding_Coordinate: -86.99998474
    North_Bounding_Coordinate: 39
    South_Bounding_Coordinate: 36.5
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  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 (0)
      • String (3767)
      • GT-polygon composed of chains (0)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .01. Longitudes are given to the nearest .01. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is Unknown.
      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?
    KYFLT.AAT
    arc attributes generated from arcinfo (Source: arcinfo software)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Rhea, Susan
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Susan Rhea
    US Geological Survey
    Geophysicist
    MS966, Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: email is the best way to make contact

Why was the data set created?

The data was generated to help in understanding the seismotectonic hazards in the vicinity of the lower Wabash Valley. This data complements similar data collected in the vicinity of New Madrid, MO US Geological Survey Open-File Report 95-0574, available at http://pubs.usgs.gov/of/1995/0574/

How was the data set created?

  1. From what previous works were the data drawn?
    (source 1 of 1)
    Noger, Martin C., compiler, 1988, Geologic Map of Kentucky: Kentucky Geologic Survey, Lexington, KY.

    Type_of_Source_Media: electronic
    Source_Scale_Denominator: 500,000
    Source_Contribution: dxf file
  2. How were the data generated, processed, and modified?
    Date: 14-Sep-1995 (process 1 of 2)
    (capitalized parts of words are arcinfo commands)
    Scanned data in dxf format emailed to SRhea. The covers were not georeferenced and had to be 'rubber-sheeted'. This involved TRANSFORMing the cover from page units (inches) to map units (meters) in an Albers Equal Area projection. Cultural features and latitude/longitude intersections were identified on the cultural features cover and on previously georeferenced base covers. Links between the two covers were created and the cultural features cover was ADJUSTed and compared to the base cover. Several iterations of creating links and ADJUSTing were required to get a good match. The links were then copied from the cultural features cover into the fault cover and used to ADJUST the faults. The adjusted cover was clipped to the map area.
    The resulting fault cover overlapped some of the more accurate data in the Paducah cover (padflt) and the less accurate data in the Illinois Basin Consortium cover (ibcflt). This cover's boundary was used to erase overlapping faults in the IBC cover. This cover was erased by the Paducah cover's boundary.
    At the boundary between the Paducah cover and Kentucky cover, misalignments between faults were visible. These errors were assumed to be in the Kentucky cover and it was adjusted again to eliminate misalignments.
    Revisions: Data not explicitly changed, although location inaccuracies introduced or corrected by transform and adjust procedures is unknown.
    Date: 06-May-1998 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Susan Rhea
    US Geological Survey
    Geophysicist
    MS966, Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: email is the best way to make contact
  3. What similar or related data should the user be aware of?
    Wheeler, R.L., Rhea, Susan, and Diehl, S.F., Drahovzal, J.A., Bear, G.W., and Sargent, M.L., 1997, Seismotectonic map showing faults, igneous rocks, and geophysical and neotectonic features in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky : U.S. Geological Survey Miscellaneous Investigations Series Map I-2583-D, U.S. Geological Survey, Denver.

    Other_Citation_Details: pamphlet accompanies map

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    The coverage contains no attributes beyond those generated by ARC/INFO.
  2. How accurate are the geographic locations?
    Original scale 1:500,000. The scanned images were not georeferenced, and an unknown amount of error was introduced during the georeferencing process.
    No tests performed. Accuracy of locations on the Geologic Map of Kentucky is unknown. The relative accuracy in this representation is the same as on that source map. Absolute locations are within several km, although this is estimated. Faults were compared to those on 1:250,000 scale Paducah Quadrangle Geologic Map and were adjusted to connect where it appeared they should.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    all faults included on the Geologic Map of Kentucky within the map area are represented in this cover
  5. How consistent are the relationships among the observations, including topology?
    Chain-node topology present.

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: none
  1. Who distributes the data set? (Distributor 1 of 1)
    Susan Rhea
    US Geological Survey
    Geophysicist
    USGS Mail Stop 966
    Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: Email is the best way to make contact.
  2. What's the catalog number I need to order this data set? USGS Open-File Report 97-0681
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Any use of trade names is for descriptive purposes only and does not imply endorsement by the USGS.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    ARC/INFO version 7.0.3 or later or ArcView 3.0 or later

Who wrote the metadata?

Dates:
Last modified: 10-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:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/kyflt.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:06:57 2018