Identification_Information:
  Citation:
    Citation_Information:
      Originator: U.S. Geological Survey
      Publication_Date: 2010
      Title: JPEG images of Chirp seismic data collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 (JPEG IMAGES)
      Edition: 1.0
      Geospatial_Data_Presentation_Form: raster digital data
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 2010-1035
      Publication_Information:
        Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
        Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
      Online_Linkage: htpp://pubs.usgs.gov/of/2010/1035/gis_catalog/seisimage/ch_seisimage.zip
      Online_Linkage: http://pubs.usgs.gov/of/2010/1035/html/gis.html
      Larger_Work_Citation:
        Citation_Information:
          Originator: Jane F. Denny
          Originator: David S. Foster
          Originator: Charles R. Worley
          Originator: Barry J. Irwin
          Publication_Date: 2010
          Title: Geophysical data collected from the St. Clair River between Michigan and Ontario, Canada, 2008-016-FA
          Edition: 1.0
          Geospatial_Data_Presentation_Form: online
          Series_Information:
            Series_Name: Open-File Report
            Issue_Identification: 2010-1035
          Publication_Information:
            Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
            Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
          Online_Linkage: http://pubs.usgs.gov/of/2010/1035/
  Description:
    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.
    Purpose: JPEG images of each seismic profile were generated in order to incorporate images of the seismic data into Geographic Information System (GIS) projects and data archives utilizing HTML. These JPEG images represent 80 km of Chirp seismic data collected in 2008 during USGS cruise 08016. This format is universal and yields an easily viewable image of the seismic profiles. Each profile image is hyperlinked to its corresponding trackline navigation contained within a polyline shapefile (08016_Chirp_trk.shp), shot-point locations are available in a point shapefiles (08016_chrip_500sht.shp, 08016_Chirp_100sht.shp). These data are available in an ESRI ArcMap project, as well as separate .zip archives (<http://pubs.usgs.gov/pubs/of/2010/1035/gis_catalog/>).
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20080529
        Beginning_Time: 20080601
        Ending_Date: 20080530
        Ending_Time: 20080602
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -82.513962
      East_Bounding_Coordinate: -82.402206
      North_Bounding_Coordinate: 43.015465
      South_Bounding_Coordinate: 42.655571
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: General
      Theme_Keyword: U.S. Geological Survey
      Theme_Keyword: USGS
      Theme_Keyword: Woods Hole Coastal and Marine Science Center
      Theme_Keyword: WHCMSC
      Theme_Keyword: Coastal and Marine Geology Program
      Theme_Keyword: CMGP
      Theme_Keyword: seismic
      Theme_Keyword: Knudsen 3200 dual-frequency
      Theme_Keyword: WHCMSC field activity serial number 08016
      Theme_Keyword: JPEG Image
      Theme_Keyword: USGS R/V Rafael
      Theme_Keyword: Chirp
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: geoscientificInformation
      Theme_Keyword: inlandWaters
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: North America
      Place_Keyword: United States
      Place_Keyword: Michigan
      Place_Keyword: Great Lakes
      Place_Keyword: Upper Great Lakes
      Place_Keyword: Lake Huron
      Place_Keyword: St. Clair River
      Place_Keyword: Upper St. Clair River
      Place_Keyword: Canada
      Place_Keyword: Ontario
  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.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Jane Denny
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543
        Country: USA
      Contact_Voice_Telephone: 508-548-8700 x2311
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: jdenny@usgs.gov
  Browse_Graphic:
    Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2010/1035/gis_catalog/seisimage/ch_seis_sm.jpg
    Browse_Graphic_File_Description: Thumbnail image of representative Chirp sub-bottom profile
    Browse_Graphic_File_Type: JPEG
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
  Cross_Reference:
    Citation_Information:
      Originator: David S. Foster
      Originator: Jane F. Denny
      Publication_Date: 2009
      Title: Quaternary Geologic Framework of the St. Clair River between Michigan and Ontario, Canada
      Edition: 1.0
      Geospatial_Data_Presentation_Form: on-line document
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 2009-1137
      Publication_Information:
        Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
        Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
      Online_Linkage: http://pubs.usgs.gov/of/2009/1137/
  Cross_Reference:
    Citation_Information:
      Originator: John Stockwell
      Publication_Date: 2007
      Title: Seismic Un*x
      Geospatial_Data_Presentation_Form: document
      Publication_Information:
        Publication_Place: Golden, CO
        Publisher: Center for Wave Phenomena - Colorado School of Mines
      Online_Linkage: http://www.cwp.mines.edu/cwpcodes/index.html
  Cross_Reference:
    Citation_Information:
      Originator: Barry, K.M.
      Originator: Cavers, D.A.
      Originator: Kneale, C.W.
      Publication_Date: 1975
      Title: Report on recommended standards for digital tape formats
      Geospatial_Data_Presentation_Form: document
      Series_Information:
        Series_Name: Geophysics
        Issue_Identification: v. 40, no. 02, p. 344-352.
      Publication_Information:
        Publication_Place: Houston, TX
        Publisher: Society of Exploration Geophysicists (SEG)
      Online_Linkage: http://www.seg.org/SEGportalWEBproject/prod/SEG-Publications/Pub-Technical-Standards/Documents/seg_y_rev0.pdf
Data_Quality_Information:
  Logical_Consistency_Report: Processed chirp seismic data were converted to JPEG format for ease of seismic trace display. Quality control was conducted during processing.
  Completeness_Report: All acquired chirp  seismic data were processed and JPEG images produced.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
        Differential Global Positioning System (DGPS) navigation data were acquired with a Communications Systems International (CSI), Inc. LGBX Pro receiver and sent to Knudsen acquisition software, SounderSuite, where Chirp sub-bottom data with a peak frequency of 3.5 kHz were recorded in Society of Exploration Geophysicists Y (SEG-Y) format (Barry and others, 1975) with DGPS logged to the SEG-Y trace headers. 

        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/>).
  Lineage:
    Source_Information:
      Source_Contribution: The Chirp sub-bottom profiler was deployed off the starboard side of the USGS R/V Rafael.   Chirp sub-bottom profiles were collected using a dual-frequency (3.5 and 200 kHz) Knudsen Engineering Limited (KEL) Chirp 3200® system (Knudsen Engineering Limited, 2009). The single-beam water depths from the 200-kHz channel were logged together with navigation in ASCII format. Chirp sub-bottom data with a peak frequency of 3.5 kHz were recorded using Knudsen acquisition software, SounderSuite, in Society of Exploration Geophysicists Y (SEG-Y) format (Barry and others, 1975) with DGPS navigation logged to the SEG-Y file trace headers. The Chirp system was fired at a rate of 0.25 or 0.5 s. The trace length was set to 67 ms. The vertical resolution of this system is approximately 30 cm. A total of 80 km of sub-bottom data were collected
    Process_Step:
      Process_Description:
        A script was executed using Seismic Unix (version 4.1) to read the SEG-Y files, write a Seismic Unix file, and extract SEG-Y trace header information, which included shot number, longitude (arc seconds), latitude (arc seconds), year, filename, Julian day, and time of day (UTC). Geographic coordinates (WGS84) were converted to UTM zone 17 coordinates (WGS84) using Proj (version 4.6.0). Before saving the header information to a text file, the data were filtered using AWK (no version) to save only unique shot point locations.  The unique shot navigation for each seismic line were then concatenated into a comma delimited (.csv) text file.

        (Barry and others, 1975; Stockwell, 2007)
      Process_Date: 2008
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: U.S. Geological Survey
            Contact_Person: David Foster
          Contact_Position: Geologist
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 384 Woods Hole Road
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543
            Country: USA
          Contact_Voice_Telephone: 508-548-8700 x 2271
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: dfoster@usgs.gov
    Process_Step:
      Process_Description:
        A C-Shell script using Seismic Unix (version 4.1) to read the SEG-Y files and plot the data as 8-bit gray scale Postscript files using the Seismic Unix 'psimage' algorithm was then executed. All images were created with a horizontal scale of 40 traces per inch. The profiles contain 50 milliseconds of Two-Way Travel Time within an 8-inch vertical window, yielding 6.25 milliseconds per inch. Postscript images were converted to JPEG format using the UNIX ImageMagick (version 5.5.6).

        Software: Seismic Unix 4.1, ImageMagick 5.5.6
      Process_Date: 2008
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: David Foster
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Geologist
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 384 Woods Hole Road
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543
            Country: USA
          Contact_Voice_Telephone: 508-548-8700 x2271
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: dfoster@usgs.gov
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Jane Denny
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543
        Country: USA
      Contact_Voice_Telephone: 508-548-8700 x2311
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: jdenny@usgs.gov
  Resource_Description: Downloadable Data
  Distribution_Liability:
    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.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: WinZip
        Format_Version_Number: 9.0
        Format_Information_Content: WinZip file containing JPEG images of Chirp seismic data and associated metadata collected during USGS Cruise 08016.
        File_Decompression_Technique: Use WinZip or pkUnzip
        Transfer_Size: 88,562 KB
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: htp://pubs.usgs.gov/of/2010/1035/gis_catalog/seisimage/ch_seisimage.zip
          Access_Instructions: Data can be downloaded via the World Wide Web  (WWW)
    Fees: none
  Technical_Prerequisites: These JPEG data can be viewed with any image viewing software.
Metadata_Reference_Information:
  Metadata_Date: 20110125
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: Jane F. Denny
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543
        Country: USA
      Contact_Voice_Telephone: 508-548-8700 x2311
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: jdenny@usgs.gov
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
  Metadata_Access_Constraints: none
  Metadata_Use_Constraints: none
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile