c27_43111d1_c

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?
    Title: c27_43111d1_c
    Abstract:
    This data includes delineations of landslide areas within the United States Geological Survey 7.5 minute Palisades Peak Quadrangle Map at 1:24,000 scale. The source map was produced by the Wyoming State Geological Survey. James C. Case is the project manager. The source map was scanned using the Tangent CCS FB34/D1R Digital Reproduction System supported by a Sun Microsystems Ultra 2 System. This flatbed scanner features an imaging area of 24" by 34" with a resolution of up to 600 d.p.i. The scanner is housed and operated by the American Heritage Center, University of Wyoming, Laramie, (307) 766-6835. The landslide delineations were attributed by Robin D. Gray of the Water Resources Data System, (307) 766-6651. This map is one part of the Wyoming State Geological Survey Landslide Database Project which encompasses 850 such maps.
    Supplemental_Information:
    These maps have been released by the Wyoming State Geological Survey as Preliminary Landslide Maps.

  1. How should this data set be cited?

    Wyoming State Geological Survey and the Water Resources Data System., February, 2001, c27_43111d1_c: Preliminary Landslide Map, Wyoming State Geological Survey, Laramie, Wyoming.

    Other_Citation_Details:
    This coverage was developed from the Palisades Peak Quadrangle, Preliminary Landslide Map, produced by Laura L. Larsen and James C. Case, published by the Wyoming State Geological Survey in 1990.
    This is part of the following larger work.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -111.064632
    East_Bounding_Coordinate: -111.000000
    North_Bounding_Coordinate: 43.481133
    South_Bounding_Coordinate: 43.374979

  3. What does it look like?

    N/A (N/A)
    N/A

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

    Calendar_Date: February, 2001
    Currentness_Reference: publication date

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  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):

      • Complete chain (89)
      • Entity point (55)
      • GT-polygon composed of chains (55)
      • Point (4)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Transverse Mercator.

      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -111.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000032
      Ordinates (y-coordinates) are specified to the nearest 0.000032
      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 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    c27_43111d1_c.pat
    Polygon attribute table (Source: None)

    FID

    SHAPE

    AREA

    PERIMETER

    C27_43111D1_C#

    C27_43111D1_C-ID

    LS_TYPE
    Landslide type (Source: Wyoming State Geological Survey)

    ISLAND
    A bedrock polygon completely surrounded by landslides (Source: Wyoming State Geological Survey)

    Entity_and_Attribute_Overview:
    LS-TYPE (landslide type) is comprised of one or more of the following, separated by "/":
    Entity_and_Attribute_Detail_Citation: av - avalanche chute (usually associated with debris flows)
    Entity_and_Attribute_Detail_Citation: blsl - block slide (rock or earth)
    Entity_and_Attribute_Detail_Citation: blstrm - block stream
    Entity_and_Attribute_Detail_Citation: bs - bedrock slump
    Entity_and_Attribute_Detail_Citation: bs/ds - bedrock slump/debris slump
    Entity_and_Attribute_Detail_Citation: dav - debris avalanche
    Entity_and_Attribute_Detail_Citation: df - debris flow
    Entity_and_Attribute_Detail_Citation: dlef - debris-laden earth flow
    Entity_and_Attribute_Detail_Citation: ds - debris slump
    Entity_and_Attribute_Detail_Citation: ef - earth flow
    Entity_and_Attribute_Detail_Citation: es - earth slump
    Entity_and_Attribute_Detail_Citation: f - flow (earth or debris-laden earth)
    Entity_and_Attribute_Detail_Citation: frf - flowing rock fragments
    Entity_and_Attribute_Detail_Citation: m - multiple
    Entity_and_Attribute_Detail_Citation: mblsl - multiple block slide (rock or earth)
    Entity_and_Attribute_Detail_Citation: mdf - multiple debris flow
    Entity_and_Attribute_Detail_Citation: mf - multiple flow (earth or debris-laden earth)
    Entity_and_Attribute_Detail_Citation: mrff - multiple rock fragment flow
    Entity_and_Attribute_Detail_Citation: mrs - multiple rock slide
    Entity_and_Attribute_Detail_Citation: ms - multiple slump (bedrock, debris, or earth)
    Entity_and_Attribute_Detail_Citation: rf - rock fall
    Entity_and_Attribute_Detail_Citation: rff - rock fragment flow
    Entity_and_Attribute_Detail_Citation: rg - rock glacier
    Entity_and_Attribute_Detail_Citation: rga - rock glacier--active
    Entity_and_Attribute_Detail_Citation: rgi - rock glacier--inactive
    Entity_and_Attribute_Detail_Citation: rs - rock slide
    Entity_and_Attribute_Detail_Citation: s - slump
    Entity_and_Attribute_Detail_Citation: s/f - slump/flow complex
    Entity_and_Attribute_Detail_Citation: solif - solifluction
    Entity_and_Attribute_Detail_Citation: tf - talus flow

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?

    Wyoming State Geological Survey and the Water Resources Data System

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

    James C. Case
    Wyoming State Geological Survey
    Geologic Hazards
    PO Box 3008, Wyoming Geological Survey Building, University of Wyoming
    Laramie, Wyoming 82071
    USA

    (307) 766-2286 (voice)
    (307) 766-2605 (FAX)
    jcase@wsgs.uwyo.edu

    Hours_of_Service: 8:00 AM until 5:00 PM (MST)

Why was the data set created?
To display landslide data for Wyoming counties over the Internet, and to make each Preliminary Landslide Map in the study area available for download over the Internet for the purpose of disaster response, disaster preparedness, and planning.

How was the data set created?
  1. Where did the data come from?

    Preliminary Landslide Map (source 1 of 2)
    Laura L. Larsen and James C. Ca, Wyoming State Geological Survey, 1990, Palisades Peak Quadrangle, Preliminary Landslide Map: Preliminary Landslide Maps, Wyoming State Geological Survey, Laramie, Wyoming.

    This is part of the following larger work.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24,000
    Source_Contribution: Wyoming State Geological Survey

    256 grayshade TIF (source 2 of 2)
    American Heritage Center (University of Wyoming) created the TIF from a drafted mylar of the Wyoming State Geological Survey Preliminary Landslide Map., Unpublished Material, 256 Grayshade TIF: N/A N/A, N/A, N/A.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: N/A
    Source_Contribution:
    Preliminary Landslide Map was scanned using the Tangent CCS FB34/D1R Digital Reproduction System supported by a Sun Microsystems Ultra 2 System. This flatbed scanner features an imaging area of 24" by 34" with a resolution of up to 600 d.p.i. The scanner is housed and operated by the American Heritage Center, University of Wyoming, Laramie, (307) 766-6835. The mylar was digitized into a 256 grayshade TIF. This file was burned to a CD-ROM for delivery to the Water Resources Data System for attribution.

  2. What changes have been made?

    Date: 2000 (change 1 of 2)
    The Preliminary Landslide Maps, which were originally drafted on paper United States Geological Survey 7.5 minute Quadrangle Maps, were transferred to mylar. The mylar was scanned at a resolution of 300 dots per inch (dpi) and 256 shades of gray (8 bit) using the using the Tangent CCS FB34/D1R Digital Reproduction System supported by a Sun Microsystems Ultra 2 System. (This flatbed scanner features an imaging area of 24" by 34" with a resolution of up to 600 dpi. The scanner is housed and operated by the American Heritage Center, University of Wyoming, Laramie, (307) 766-6835.) The resulting scans were converted to single-bit (black and white) and cleaned in Corel Photo-Paint 8 to remove scanner artifacts, and to enhance tics. The single-bit TIFFs were processed through GTX OSR 4 (a raster to vector conversion program) with a smoothness of 1. This produces a DXF file which was entered into ArcInfo 8 for attribution.

    Person responsible for change:

    Antony R. Bergantino
    Water Resources Data System
    Project Manager
    PO Box 3943, Engineering Building, University of Wyoming
    Laramie, Wyoming 82071
    USA

    Water Resources Data System (307) 766-6651 (voice)
    Water Resources Data System (307) 766-3785 (FAX)
    wrds@uwyo.edu

    Hours_of_Service: 8:00 AM - 5:00 PM (MST)
    Contact_Instructions: N/A
    Date: 2000 (change 2 of 2)
    The following process was completed in ArcInfo 8, and summarizes the steps in digitizing the Preliminary Landslide Maps: 1. Export TIFF to DXF; 2. Determine the number of layers; 3. Export DXF to coverage; 4. Rotate coverage; 5. Clean (use default tolerances); 6. Put in tics (digitizing units); 7. Clip the 24quad Lambert coverage to needed quad; 8. Put in tics at nodes (corners) of quad; 9. Create watch file for transformation output; 10. Transform the coverage to real-world coordinates; 11. Edit (unclosed polygons, undershoots, overshoots, slivers, etc.); 12. Build or clean; 13. Clip landslide coverage to quad; 14. Edit again to check for errors; 15. Attribute; 16. Save as landslide cover; 17. For any coverage that has islands create a mask file of just those islands; 18. Reproject final coverage to Universal Transverse Mercator, in meters, North American Datum 1927; and 19. Mapjoin all final coverages.

    Person responsible for change:

    Robin D. Gray
    Water Resources Data System
    Project Coordinator
    PO Box 3943
    Laramie, Wyoming 82071
    USA

    (307) 766-6651 (voice)
    (307) 766-3785 (FAX)
    grayr@uwyo.edu

    Hours_of_Service: 8:00 AM - 5:00 PM (MST)
    Contact_Instructions: N/A

How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?

    All attributes have been checked against original, paper Preliminary Landslide Maps. Not all landslides have been field-verified.

  2. How accurate are the geographic locations?

    The Wyoming State Geological Survey Prelminary Landslide Maps were developed from the United States Geological Survey (USGS) 1:24,000-scale quadrangle maps. According to the USGS National Mapping Accuracy Standards, these quadrangle maps have an inherited error of +/- 40 feet. Therefore, accuracy for this dataset is approximately +/- 40 feet. This estimation has not been formally tested. The estimation is based on the National Mapping Accuracy Standars, taking into account the source scale of the aerial photographs, limitations associated with interpreting and transcribing polygons by hand, and scanning hand-drawn polygons on USGS 1:24,000-scale base maps. This coverage was registered using four tics, one at each corner, and an RMS error (input, output) = (0.002, 1.072).

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    All polygons are appropriately labeled.

  5. How consistent are the relationships among the observations, including topology?

    The polygon topology has been checked and verified. All polygons are closed. Each polygon has one label. All dangles and slivers were removed.

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:
These Preliminary Landslide Maps are NOT to be used at a scale larger than 1:24,000. Not all landslides may have been mapped. Not all landslides have been field checked.

  1. Who distributes the data set? (Distributor 1 of 1)

    James C. Case
    Wyoming State Geological Survey
    Geologic Hazards
    PO Box 3008, Wyoming Geological Survey Building, University of Wyoming
    Laramie, Wyoming 82071
    USA

    (307) 766-2286 (voice)
    (307) 766-2605 (FAX)
    jcase@wsgs.uwyo.edu

    Hours_of_Service: 8:00 AM - 5:00 PM (MST)
    Contact_Instructions: N/A
  2. What's the catalog number I need to order this data set?

    Wyoming State Geological Survey Preliminary Landslide Maps

  3. What legal disclaimers am I supposed to read?

    When using the Preliminary Landslide Maps, proper reference should be given to the Wyoming State Geological Survey, James C. Case, Project Manager.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    Contact James C. Case, Wyoming State Geological Survey, (307) 766-2286

  6. What hardware or software do I need in order to use the data set?

    These Preliminary Landslide Maps are NOT to be used at a scale larger than 1:24,000. Not all landslides may have been mapped. Not all landslides have been field checked.

Who wrote the metadata?
Dates:
Last modified: 25-Jan-2001

Metadata author:
James C. Case, and Dennis M. Feeney
Wyoming State Geological Survey and Water Resources Data System
James C. Case, Geologic Hazards; Dennis Feeney, Coordinator
Wyoming State Geological Survey, PO Box 3008, Wyoming Geological Survey Building, University of Wyoming
Laramie, Wyoming 82071
USA

(307) 766-2286 (James C. Case); (307) 766-6659 (Dennis M. Feeney) (voice)
(307) 766-2605 (Wyoming State Geological Survey); (307) 766-3785 (Water Resources Data System) (FAX)
jcase@wsgs.uwyo.edu; dmfeeney@uwyo.edu

Hours_of_Service: 8:00 AM - 5:00 PM (MST)
Contact_Instructions: N/A
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

Generated by mp version 2.4.38 on Mon Jan 29 08:23:11 2001