08016_KLEIN_TRK.SHP: Sidescan-sonar trackline navigation collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 (ESRI VECTOR SHAPEFILE)

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Frequently-anticipated questions:

What does this data set describe?

Title:
08016_KLEIN_TRK.SHP: Sidescan-sonar trackline navigation collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 (ESRI VECTOR SHAPEFILE)
Abstract:
In 2008, the U.S. Geological Survey (USGS), Woods Hole Coastal and Marine Science Center (WHCMSC), in cooperation with the U.S. Army Corps of Engineers conducted a geophysical and sampling survey of the riverbed of the Upper St. Clair River between Port Huron, MI, and Sarnia, Ontario, Canada. The objectives were to define the Quaternary geologic framework of the St. Clair River to evaluate the relationship between morphologic change of the riverbed and underlying stratigraphy. This report presents the geophysical and sample data collected from the St. Clair River, May 29-June 6, 2008 as part of the International Upper Great Lakes Study, a 5-year project funded by the International Joint Commission of the United States and Canada to examine whether physical changes in the St. Clair River are affecting water levels within the upper Great Lakes, to assess regulation plans for outflows from Lake Superior, and to examine the potential effect of climate change on the Great Lakes water levels ( <http://www.iugls.org>). This document makes available the data that were used in a separate report, U.S. Geological Survey Open-File Report 2009-1137, which detailed the interpretations of the Quaternary geologic framework of the region. This report includes a description of the suite of high-resolution acoustic and sediment-sampling systems that were used to map the morphology, surficial sediment distribution, and underlying geology of the Upper St. Clair River during USGS field activity 2008-016-FA . Video and photographs of the riverbed were also collected and are included in this data release. Future analyses will be focused on substrate erosion and its effects on river-channel morphology and geometry. Ultimately, the International Upper Great Lakes Study will attempt to determine where physical changes in the St. Clair River affect water flow and, subsequently, water levels in the Upper Great Lakes.
  1. How should this data set be cited?

    U.S. Geological Survey, 2010, 08016_KLEIN_TRK.SHP: Sidescan-sonar trackline navigation collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 (ESRI VECTOR SHAPEFILE): Open-File Report 2010-1035, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Denny, Jane F. , Foster, David S. , Worley, Charles R. , and Irwin, Barry J. , 2010, Geophysical data collected from the St. Clair River between Michigan and Ontario, Canada, 2008-016-FA: Open-File Report 2010-1035, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -82.426842
    East_Bounding_Coordinate: -82.402023
    North_Bounding_Coordinate: 43.014870
    South_Bounding_Coordinate: 42.956257

  3. What does it look like?

    <https://pubs.usgs.gov/of/2010/1035/gis_catalog/tracklines/klein_trk_sm.jpg> (JPEG)
    Thumbnail image of trackline navigation for sidescan-sonar system

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

    Beginning_Date: 29-May-2008
    Ending_Date: 30-May-2008
    Currentness_Reference: ground condition

  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):

      • String (41)

    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 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.

  7. How does the data set describe geographic features?

    08016_klein_trk
    ESRI vector shapefile (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    Line
    Line and file number for corresponding sidescan-sonar files. This information is used during data acquisition, processing and archival. (Source: U.S. Geological Survey)

    L3-Klein Associates naming convention for collected sonar lines of data. The format is: L1F1, where L=line, 1= Number, F=File, 1=File number, _080708= YYMMDD, and 120000=HHMMSS

    JD
    Julian Day during which sonar data were collected, where day 1 is equal to January 1, 2008 (Source: U.S. Geological Survey)

    Range of values
    Minimum:150
    Maximum:151
    Units:Julian Day (Year 2008)

    Length
    length of line segment in UTM, Zone 17N, WGS84, kilometers (Source: U.S. Geological Survey)

    Range of values
    Minimum:0.117234
    Maximum:6.822692
    Units:kilometers

    System
    Sidescan-sonar system used for data acquisition (Source: U.S. Geological Survey)

    Text field

    Frequency
    Frequency of sidescan-sonar data acqusition system (Source: U.S. Geological Survey)

    Text field

    Swath
    Swath width used during sidescan-sonar data acqusition (meters). (Source: U.S. Geological Survey)

    ValueDefinition
    100 meterswath width of sidescan-sonar system used during data acquisition

    Cruise_ID
    Unique USGS cruise identification (Source: U.S. Geological Survey)

    ValueDefinition
    08016USGS Cruise Identification Number, where the first two digits represent calendar year and the last three digits represent cruise number

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?

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

    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov

Why was the data set created?

This data set contains trackline navigation for approximately 58 km of sidescan-sonar data collected by the U.S. Geological Survey during cruise 08016 within the St. Clair River between Michigan and Ontario, Canada, 2008

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    U.S. Geological Survey.

    Type_of_Source_Media: disc
    Source_Contribution:
    Sidescan-sonar data were acquired with L3-Klein Associates, Inc., System 3000 dual-frequency sonar operating at 132 and 445 kHz (<http://www.l-3klein.com/>). Sonar data were collected at 0.033-s sampling rate, yielding a 50-m range, or 100-m swath width. L3-Klein SonarPro® acquisition software was used to log the data digitally and store them in eXtended Triton format (XTF) (<http://www.tritonimaginginc.com/site/>). The sonar system was deployed off the port side of the RV Rafael and towed less than 5 m astern. Horizontal and vertical offsets between the sonar tow-fish and the DGPS antenna were stored within SonarPro®, allowing for tow-fish position to be calculated dynamically during acquisition. A total of approximately 58 km of sidescan-sonar data were collected. Sidescan-sonar data were collected during Julian Day 150 - 151 (lines 1 - 35).

  2. How were the data generated, processed, and modified?

    Date: 2008 (process 1 of 5)
    Navigation data were extracted at 1 minute intervals from the raw sidescan sonar data (XTF format) during the 'demultiplex' phase of data processing within XSonar/ShowImage sidescan-sonar processing software (Danforth and others, 1991; Danforth, 1997) and stored in ASCII files. Software: XSonar/ShowImage (no version)

    Person who carried out this activity:

    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov

    Date: 2008 (process 2 of 5)
    A c-shell script was used to reformat the output from degrees decimal minutes to decimal degrees. Proj (version 4.6.1) and AWK (GNU 3.1.5) were used to convert decimal degrees to eastings and northings (based on UTM Zone 17 N, WGS84) and to reformat the output as a comma delimited ASCII file including headers listing field names (Easting, Northing, Line Number, Julian Day, Longitude, Latitude).

    Person who carried out this activity:

    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov

    Date: 2008 (process 3 of 5)
    The ASCII file (*.csv) was imported into ESRI ArcMap 9.2 using Tools - Add XY Data and converted to an event theme. The event theme was then saved to a point shapefile and the projection was defined as UTM, Zone 17N, meters, WGS84. The point shapefile was visually inspected for spurious data points and deleted.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o Jane Denny
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508 548-8700 x 2311 (voice)
    508 457-2310 (FAX)
    jdenny@usgs.gov

    Date: 2008 (process 4 of 5)
    The point shapefile containing 1-minute navigation was used as an input for a VACExtras (version 1.8), a VB collection of tools developed by VeeAnn Cross (USGS-WHSC), that converts point data to a new polyline (vector) shapefile, based on the order of records contained within one attribute field. The line number field was used to define the point order and as the unique line identifier.

    Person who carried out this activity:

    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508 548-8700 x 2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov

    Date: 2009 (process 5 of 5)
    The length of each line segment was calculated and included in a new attribute field using XTools Pro for ArcGIS desktop (version 6.2.0), specifying UTM Zone 17 N, WGS84 - kilometers. Year, System, Swath and Cruise_ID fields were added to the attribute table within ArcMap 9.2.

    The vector shapefile was then reprojected to the Geographic Coordinate System, WGS84 using Arc Toolbox, Data Management Tools, Projections and Transformations, Feature, Project.

    Arc Toolbox, Data Management Tools, Projections and Transformations, Project was then used to project the shapefile from UTM, Zone 17 N, meters, WGS84 to Geographic Coordinate system, WGS84.

    Person who carried out this activity:

    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508 548-8700 x 2311 (voice)
    508 457-2310 (FAX)
    jdenny@usgs.gov

  3. What similar or related data should the user be aware of?

    Foster, David S. , and Denny, Jane F. , 2009, Quaternary Geologic Framework of the St. Clair River between Michigan and Ontario, Canada: Open-File Report 2009-1137, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Danforth, William W. , 1997, XSonar/ShowImage: A complete system for rapid sidescan-sonar processing and display: USGS Open-File Report 97-686, U.S. Geological Survey, Woods Hole, MA.

    Danforth, W.W., O'Brien, T.F., and Schwab, W.C., 1991, USGS image processing system: near real-time mosaicking of high-resolution sidescan-sonar data: Sea Technology January 1991, Sea Technology, Arlington, VA.

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

  1. How well have the observations been checked?

    Attributes relay information about the object ID (i.e. vector polyline), date of data collection, type of sonar system used to acquire data, the frequency of the sonar system, swath width of the sonar system, USGS unique cruise identification, and the length of tracklines (km). Attributes were checked for consistency and for accuracy of descriptive information.

  2. How accurate are the geographic locations?

    Differential Global Positioning System (DGPS) navigation data were acquired with a Communications Systems International (CSI), Inc. LGBX Pro receiver and sent directly to the sidescan-sonar acquisition software, L3-Klein Associates, SonarPro. The LGBX Pro received DGPS positions from a DGPS antenna located on the port, aft roof of the R/V Rafael cabin. The sonar system was deployed off the port side of the RV Rafael and towed less than 5 m astern. Horizontal and vertical offsets between the sonar tow-fish and the DGPS antenna were stored within SonarPro®, allowing for tow-fish position to be calculated dynamically during acquisition. DGPS accuracy is 1 to 3 meters, depending on the distance from a US Coast Guard coastal repeater station (<http://www.navcen.uscg.gov/>). DGPS accuracy is 1 to 3 meters, depending on the distance from a US Coast Guard coastal repeater station (<http://www.navcen.uscg.gov/>).

  3. How accurate are the heights or depths?

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

    All sidescan-sonar navigation data were used to generate the trackline shapefile.

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

    All sidescan-sonar data were collected during USGS cruise 08016 using a Klein system 3000 sidescan-sonar system. Quality control was conducted during processing of the data. Any spurious data or artifacts were removed or minimized. Sidescan-sonar data were collected during Julian Days 150 - 151 (Lines 1 - 35).

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:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.

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

    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2311 (voice)
    508-457-2311 (FAX)
    jdenny@gmail.com

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.

    Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

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

    This zip file contains data available in Environmental Systems Research Institute (ESRI) vector shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.

Who wrote the metadata?

Dates:
Last modified: 25-Jan-2011
Metadata author:
U.S. Geological Survey
c/o Jane F. Denny
Geologist
384 Woods Hole Road
Woods Hole, MA 02543
USA

508-548-8700 x2311 (voice)
508-457-2310 (FAX)
jdenny@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.25 on Tue Jan 25 17:14:47 2011