Identification_Information:
  Citation:
    Citation_Information:
      Originator: Blake F. Smullen
      Originator: Arnell S. Forde
      Originator: James G. Flocks
      Publication_Date: 20250911
      Title: Archive of Digitized Analog Boomer Seismic-Reflection Data Collected in 1992 During the ERDA92-3 Survey Along the Texas-Louisiana Border
        Geospatial_Data_Form: SEG-Y, tabular, and raster digital data
      Larger_Work_Citation:
        Citation_Information:
          Originator: Blake F. Smullen
          Originator: Arnell S. Forde
          Originator: Jim G. Flocks
          Publication_Date: 20250911
          Title: Archive of Digitized Analog Boomer Seismic-Reflection Data Collected in 1992 During the ERDA92-3 Survey Along the Texas-Louisiana Border
          Series_Information:
            Series_Name: U.S. Geological Survey data release
            Issue_Identification: doi:10.5066/P1EQAFLT
          Publication_Information:
            Publication_Place: St. Petersburg, Florida
            Publisher: U.S. Geological Survey- St. Petersburg Coastal and Marine Science Center
          Online_Linkage: https://doi.org/10.5066/P1EQAFLT
  Description:
    Abstract:
      The U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program has actively collected geophysical and sedimentological data in the northern Gulf of America (Gulf of Mexico) for several decades, including shallow subsurface data in the form of high-resolution seismic reflection profiles (HRSP). Prior to the mid-1990s most HRSP data were collected in analog format as paper rolls of continuous profiles up to 25 meters long. As part of the National Geological and Geophysical Data Preservation Program (NGGDPP, https://www.usgs.gov/programs/national-geological-and-geophysical-data-preservation-program) scientists from the USGS St. Petersburg Coastal and Marine Science Center converted analog paper records to digital format using a large-format continuous scanner. The scanned image files were subsequently processed to fix distortions and crop out blank spaces prior to exporting them as industry standard Society of Exploration Geophysicists data exchange (SEG-Y) formatted files.
      This data release serves as an archive of HRSP profiles annotated with header information, converted SEG-Y files, navigation data, cruise track line Tagged Image File (.TIFF) files, and associated reports. The HRSP data was collected between August 11 and August 14, 1992, using an EG&G Uniboom acoustic system, onboard research vessel (R/V) ERDA 1.  The data was collected from Sabine Lake, through Sabine Pass, and adjacent nearshore Gulf waters. Data conversion methods are described in USGS Data Series 1047 (Bosse and others, 2017).
      Following SPCMSC data management protocols, this survey was assigned a USGS field activity number (FAN), 1992-300-FA (alternative FAN, ERDA92-3). Additional survey and data details are available of the Coastal and Marine Geoscience Data System (CMGDS) at https://cmgds.marine.usgs.gov/services/activity.php?fan=1992-300-FA.
    Purpose: The data release associated with this metadata record serves as an archive of ERDA92-3 geophysical, navigational, and support data collected between August 11 and August 14, 1992. This data release is part of an ongoing USGS data rescue effort to preserve the geologic data that facilitates easier access to legacy datasets by scientists and the public.
    Supplemental_Information:
      The USGS-St. Petersburg Coastal and Marine Science Center (SPCMSC) currently holds 13 major geophysical surveys from the northern Gulf of America in its paper repository. Over 2,000 line-kilometers (km) of data are available. Paper copies of data are difficult and expensive to duplicate and share with other facilities and cannot be analyzed using standard geographic information systems (GIS) and interpretative software. Conversion of this data into a usable digital format is necessary to archive the geologic information that otherwise might be lost, requiring additional redundant and expensive marine geophysical surveys. The USGS NGGDPP addresses the need to preserve, catalog, and provide access to geological and geophysical data for scientific research and economic development. In addition to the current efforts under the NGGDPP, four geophysical investigations from the 1980s and 1990s were previously archived through a preservation project in collaboration with the Bureau of Ocean Energy Management (Harrison and others, 2007; Sanford and others, 2009a, b, c). The USGS-SPCMSC scans its analog HRSP holdings using a large-format continuous scanner. The analog to digital conversion process used for this dataset is similar to the processes used previously in Harrison and others (2007) and Sanford and others (2009a, b, c). The digital files were converted into TIFF for standard accessibility by raster image processors. The TIFF images of the seismic profiles were also converted into SEG-Y format. This standard non-proprietary format is the accepted industry standard for seismic data and can be accessed by all major seismic data processing and interpretation systems. Accompanying the HRSP are navigation and metadata files, which are generated for use in GIS, database and Internet Message Access Protocol (IMAP) services. Processed seismic profile images are also provided. The processed profiles provided in this data release are Portable Document Format (PDF) images that were created using Seismic Unix and/or ImageMagick software.
      The northern Gulf of America is a passive continental margin, where minimal structural change to the shallow stratigraphy has occurred during the last few thousand years (Anderson and others, 2004). Therefore, subsurface data collected from this environment for the purposes of geologic assessment can be considered useful in perpetuity. The geologic information collected by the USGS in the northern Gulf remains a valuable resource for sea floor and stratigraphic investigations and is continuously revisited by researchers interested in Holocene and recent earth processes. For example, decades-old geologic data are commonly used in sediment resource studies in coastal Louisiana (Kindinger and others, 2001; Kulp and others, 2002; Rogers and others, 2009) and previously collected datasets across the Mississippi-Alabama shelf have been used in recent geologic-framework assessments (Roberts and others, 2004; Greene and others, 2007; Flocks and others, 2009).
      Geophysical data were acquired for the Bureau of Land Management. The survey was conducted between August 11 and August 14, 1992 on board the R/V ERDA 1. Geophysical data were acquired using an EG&G Uniboom profiler. The transducer was mounted on a towed sled using a 300-Joule power supply. Data was recorded using an EPC 4100 recorder, with a bandpass of 0.4 – 1.6 kilohertz (kHz).
      Navigation events, or shots, were recorded using mark events corresponding to approximately 18.75 meter (m) intervals along the planned line. Positioning was provided by long range navigation (LORAN), a hyperbolic radio navigation system with an estimated accuracy of +/-0.2 to 0.8 km.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 19920811
        Ending_Date: 19920814
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -93.93683
      East_Bounding_Coordinate: -93.75970
      North_Bounding_Coordinate: 29.98112
      South_Bounding_Coordinate: 29.61950
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: USGS Metadata Identifier
      Theme_Keyword: USGS:61d6f6c5-dbde-452f-9b90-dae2be780f80
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: geoscientific information
      Theme_Keyword: oceans
    Theme:
      Theme_Keyword_Thesaurus: USGS Thesaurus
      Theme_Keyword: marine geology
      Theme_Keyword: geology
      Theme_Keyword: sediment transport
      Theme_Keyword: ocean processes
      Theme_Keyword: coastal processes
      Theme_Keyword: seismic reflection methods
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Marine
      Theme_Keyword: Society of Exploration Geophysicists
      Theme_Keyword: SEG-Y
      Theme_Keyword: R/V ERDA
    Place:
      Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
      Place_Keyword: Gulf of America
      Place_Keyword: Louisiana
      Place_Keyword: Texas
      Place_Keyword: Sabine Lake
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Gulf of Mexico
  Access_Constraints: No access constraints. Please see 'Distribution Information' for details. 
  Use_Constraints: These data are marked with a Creative Commons CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: James G. Flocks
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Emeritus
      Contact_Address:
        Address_Type: mailing and physical
        Address: 600 4th Street South
        City: St. Petersburg
        State_or_Province: FL
        Postal_Code: 33701
      Contact_Voice_Telephone: (727) 502-8000
      Contact_Electronic_Mail_Address:
        jflocks@usgs.gov
        Native_Data_Set_Enviroment: Environment as of Metadata Creation: Microsoft Windows 11 Enterprise Version 23H2; Photoshop (Ps) Creative Cloud 2024; Contex Nextimage Scanning Software; Microsoft Word for Office 365 version 16; ImageToSEGY 2.2; Environmental Systems Research Institute (Esri) ArcGIS Pro 3.2.1; Seismic Unix (Relase 44).
  Cross_Reference:
    Citation_Information:
      Originator: Anderson, J.B., Rodriguez, A., Abdulah, K.C., Fillon, R.H., Banfield, L.A., McKeown, H.A., and Wellner, J.S.
      Publication_Date: 20040101
      Title: Late Quaternary stratigraphic evolution of the northern Gulf of Mexico margins—A synthesis, in Anderson, J., and Fillon, R., eds., Late Quaternary stratigraphic evolution of the Northern Gulf of Mexico
      Series_Information:
        Series_Name: Society for Sedimentary Geology
        Issue_Identification: 79
      Other_Citation_Details: pages 1-23
      Online_Linkage: https://doi.org/10.2110/pec.04.79.0001
  Cross_Reference:
    Citation_Information:
      Originator: Barry, K.M., Cavers, D.A., and Kneale, C.W.
      Publication_Date: 197504
      Title: Recommended standards for digital tape formats
      Series_Information:
        Series_Name: Geophysics
        Issue_Identification: v. 40, no. 2
      Other_Citation_Details: pages 344-352
      Online_Linkage: https://library.seg.org/doi/pdf/10.1190/1.1440530
  Cross_Reference:
    Citation_Information:
      Originator: Bosse, S.T., Flocks, J.G., and Forde, A.S.
      Publication_Date: 20170421
      Title: Digitized analog boomer seismic-reflection data collected during U.S. Geological Survey cruises Erda 90-1_HC, Erda 90-1_PBP, and Erda 91-3 in Mississippi Sound, June 1990 and September 1991
      Series_Information:
        Series_Name: U.S. Geological Survey Data Series
        Issue_Identification: 1047
      Online_Linkage: https://doi.org/10.3133/ds1047
  Cross_Reference:
    Citation_Information:
      Originator: Flocks, J.G., Ferina, N.F., and Kindinger, J.L.
      Publication_Date: 2009
      Title: Recent geologic framework and geomorphology of the Mississippi-Alabama shelf, northern Gulf of Mexico, in, Buster, N.A., and Holmes, C.W., eds., Gulf of Mexico origin, waters, and biota: Volume III, Geology
      Series_Information:
        Series_Name: College Station, Texas, Texas A&M University Press
        Issue_Identification: 3
      Other_Citation_Details: pages 157-173
      Online_Linkage: https://muse.jhu.edu/book/1783
  Cross_Reference:
    Citation_Information:
      Originator: Greene, D.L., Jr., Rodriquez, A.B., and Anderson, J.B.
      Publication_Date: 20070201
      Title: Seaward-branching coastal-plain and piedmont incised-valley systems through multiple sea-level cycles: Late Quaternary examples from Mobile Bay and Mississippi Sound, U.S.A.
      Series_Information:
        Series_Name: Journal of Sedimentary Research
        Issue_Identification: 77
      Other_Citation_Details: pages 139-158
      Online_Linkage: https://doi.org/10.2110/jsr.2007.016
  Cross_Reference:
    Citation_Information:
      Originator: Harrison, A.S., Dadisman, S.V., Kindinger, J.L., Morton, R.A., Blum, M.D., Wiese, D.S., and Subino, J.A.
      Publication_Date: 2007
      Title: Archive of digital and digitized analog boomer seismic reflection data collected during USGS cruise 96CCT02 in Copano, Corpus Christi, and Nueces Bays and Corpus Christi Bayou, Texas, July 1996
      Series_Information:
        Series_Name: U.S. Geological Survey Data Series
        Issue_Identification: 296
      Online_Linkage: https://doi.org/10.3133/ds296
  Cross_Reference:
    Citation_Information:
      Originator: Kindinger, J.L., Flocks, J.G., Kulp, M.A., Penland, P.S., and Britsch, L.D.
      Publication_Date: 2001
      Title: Sand resources, regional geology, and coastal processes for the restoration of the Barataria barrier shoreline
      Series_Information:
        Series_Name: U.S. Geological Survey Open-File Report
        Issue_Identification: 2001-384
      Other_Citation_Details: 69 pages
      Online_Linkage: https://doi.org/10.3133/ofr01384
  Cross_Reference:
    Citation_Information:
      Originator: Kulp, M.A., Howell, P.D., Adiau, S., Penland, P.S., Kindinger, J.L., and Williams, S.J.
      Publication_Date: 2002
      Title: Latest Quaternary stratigraphic framework of the Mississippi River delta region
      Series_Information:
        Series_Name: Gulf Coast Association of Geological Societies Transactions
        Issue_Identification: 52
      Other_Citation_Details: pages 573-582
      Online_Linkage: https://archives.datapages.com/data/gcags/data/052/052001/0573.htm
  Cross_Reference:
    Citation_Information:
      Originator: Roberts, H.H., Fillon, R.H., Kohl, B., Robalin, J.M., and Sydow, J.C.
      Publication_Date: 2004
      Title: Depositional architecture of the Lagniappe Delta: Sediment characteristics, timing of depositional events, and temporal relationship with adjacent shelf-edge deltas, in Anderson, J.B., and Fillon, R., eds., Late Quaternary stratigraphic evolution of the northern Gulf of Mexico
      Series_Information:
        Series_Name: Society for Sedimentary Geology
        Issue_Identification: 79
      Other_Citation_Details: pages 142-189
      Online_Linkage: https://archives.datapages.com/data/sepm_sp/SP79/Depositional_Architecture_of_the_Lagniappe_Delta.pdf
  Cross_Reference:
    Citation_Information:
      Originator: Rogers, B.E., Kulp, M.A., and Miner, M.D.
      Publication_Date: 20090916
      Title: Late Holocene chronology, origin, and evolution of the St. Bernard shoals, northern Gulf of Mexico, USA
      Series_Information:
        Series_Name: Geo-Marine Letters
        Issue_Identification: 29
      Other_Citation_Details: pages 379-394
      Online_Linkage: https://doi.org/10.1007/s00367-009-0162-6
  Cross_Reference:
    Citation_Information:
      Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G.
      Publication_Date: 2009
      Title: Archive of digitized analog boomer seismic reflection data collected from the Mississippi-Alabama-Florida shelf during cruises onboard the R/V Kit Jones, June 1990 and July 1991
      Series_Information:
        Series_Name: U.S. Geological Survey Data Series
        Issue_Identification: 429
      Other_Citation_Details: 2009a
      Online_Linkage: https://doi.org/10.3133/ds429
  Cross_Reference:
    Citation_Information:
      Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G.
      Publication_Date: 2009
      Title: Archive of digitized analog boomer and minisparker seismic reflection data collected from the Alabama-Mississippi-Louisiana shelf during cruises onboard the R/V Carancahua and R/V Gyre, April and July, 1981
      Series_Information:
        Series_Name: U.S. Geological Survey Data Series
        Issue_Identification: 428
      Other_Citation_Details: 2009b
      Online_Linkage: https://doi.org/10.3133/ds428
  Cross_Reference:
    Citation_Information:
      Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G.
      Publication_Date: 2009
      Title: Archive of digitized analog boomer seismic reflection data collected from Lake Pontchartrain, Louisiana, to Mobile Bay, Alabama, during cruises onboard the R/V ERDA-1, June and August 1992
      Series_Information:
        Series_Name: U.S. Geological Survey Data Series
        Issue_Identification: 370
      Other_Citation_Details: 2009c
      Online_Linkage: https://doi.org/10.3133/ds370
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: The validity or accuracy of boomer seismic profiling data is highly qualitative and depends on equipment and operating condition variables. Visual inspection of the images rendered from the data did not show any major anomalies.
  Logical_Consistency_Report: This dataset is from the USGS SPCMSC archive and has consistent instrument calibrations.
  Completeness_Report: This dataset is considered complete for the information presented. All analog seismic profiles collected during the original survey were successfully scanned and converted to digital format. The seismic profiles provide a two-dimensional (2D) representation of the subsurface along the acquisition tracklines. Users are advised to read the rest of the metadata record carefully for additional details.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
        As the seismic reflection data were acquired, the position of the vessel was recorded using a LORAN-A navigation system. The accuracy of the LORAN-A varied from 0.2 to 0.8 km. Positions were recorded in latitude and longitude coordinates at various intervals and appear on the seismic profiles as incremental, hand-annotated vertical event marks. Each vertical line represents a 305m or 1000-foot (ft) interval.
        For this cruise, the time between starting and ending times were interpolated.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: These data are not to be used for bathymetry. Two-way travel (TWT) times shown on the printable profile images are relative to local sea level at the time of data acquisition.
  Lineage:
    Process_Step:
      Process_Description: Raw data scanning - The seismic data collected from this survey is housed in the USGS SPCMSC archive. The analog boomer data are in the form of 30 centimeter (cm)-wide paper and vellum rolls. The various rolls can be up to 6 m long and contain multiple seismic tracklines. The rolls contain the seismic profile image with pertinent collection characteristics annotated during acquisition, such as shot number and time and may also include environmental conditions and equipment details. Horizontal lines across the profiles represent TWT time in milliseconds (ms), and vertical lines represent navigation fixes acquired and annotated as the survey was underway. The vellum rolls were scanned using NextImage. The lines were then saved at 200 dpi (dots per inch), grey scaled, in TIFF files.
      Process_Date: 2025
      Source_Produced_Citation_Abbreviation: TIFF
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Blake F. Smullen
            Contact_Organization: Cherokee Nation System Solutions, Contractor to the U.S. Geological Survey
          Contact_Position: Student Services Contractor
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 600 4th Street South
            City: St. Petersburg
            State_or_Province: FL
            Postal_Code: 33701
          Contact_Voice_Telephone: (727) 502-8200
          Contact_Electronic_Mail_Address: bsmullen@contractor.usgs.gov
    Process_Step:
      Process_Description: Image cropping - The scanned TIFF images were imported into Adobe Photoshop (Ps) Creative Cloud 2024 and blank edge areas were cropped out to further reduce file size. For rolls that included more than one line of seismic data, the file was separated into individual lines. Separation was completed by cropping everything except for the line of interest, determined by the raw navigation information, from the original scan and saving it as a new file with its associated line name. The file naming convention is as follows: CruiseID_trackline#_an.tif (for example, ERDA92-3_5_an.tif). It includes the cruise identification (ERDA92_3), and trackline number.
      Source_Used_Citation_Abbreviation: TIFF
      Process_Date: 2025
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Blake F. Smullen
            Contact_Organization: Cherokee Nation System Solutions, Contractor to the U.S. Geological Survey
          Contact_Position: Student Services Contractor
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 600 4th Street South
            City: St. Petersburg
            State_or_Province: FL
            Postal_Code: 33701
          Contact_Voice_Telephone: (727) 502-8200
          Contact_Electronic_Mail_Address: bsmullen@contractor.usgs.gov
    Process_Step:
      Process_Description: Image headers - Each image of the scanned seismic profiles also includes a header with associated information including cruise- and line-specific information and processing details. The header files were created in Microsoft Word for Office 365 version 16, exported as PDF files, appended to the far left of the image frame in Adobe Photoshop, and then flattened onto the image to reduce file size.
      Source_Used_Citation_Abbreviation: TIFF
      Process_Date: 2025
      Source_Produced_Citation_Abbreviation: ERDA-92-3*.tif
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: James G. Flocks
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Emeritus
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 600 4th Street South
            City: St. Petersburg
            State_or_Province: FL
            Postal_Code: 33701
          Contact_Voice_Telephone: (727) 502-8000
          Contact_Electronic_Mail_Address: jflocks@usgs.gov
    Process_Step:
      Process_Description: Correcting scan distortion - Distortion correction is necessary because it is difficult to ensure vellum/paper rolls are fed into the scanner straight. Distortion correction practices occur in Ps and is obtained by placing a guideline over the 0 ms line (water level) on the scan. The distortion was corrected by using the Rectangular Marquee Tool in Adobe Ps to select and create a new layer of the distorted area of the scan. A skewed transform was performed, and the corrected images were saved into a new folder without layers (flattened) to reduce file size.
      Source_Used_Citation_Abbreviation: ERDA-92-3*.tif
      Process_Date: 2025
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Blake F. Smullen
            Contact_Organization: Cherokee Nation System Solutions, Contractor to the U.S. Geological Survey
          Contact_Position: Student Services Contractor
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 600 4th Street South
            City: St. Petersburg
            State_or_Province: FL
            Postal_Code: 33701
          Contact_Voice_Telephone: (727) 502-8200
          Contact_Electronic_Mail_Address: bsmullen@contractor.usgs.gov
    Process_Step:
      Process_Description: Image to SEG-Y - The scanned, distortion-corrected images were converted to digital SEG-Y (the .seg file extension was used, which has the same properties as .sgy) format revision 0 (Barry and others, 1975) using the proprietary software ImageToSEGY 2.2 from Chesapeake Technology. The scanned images were opened in ImageToSEGY and the export area was defined by assigning values to the top, bottom, left, and right pixel locations using the imaged water surface (0 ms), maximum TWT time (for example, 112.5 ms) and raw navigation data for each line. Trace amplitudes in the scanned profiles are represented by pixels, so each pixel becomes a trace sample and the sample rate of the converted SEG-Y version is the record length divided by the number of vertical pixels in the profile. For example, if the profile is 4,435 pixels vertically and the two-way travel time is 112.5 ms, then the sample rate for the SEG-Y file version is 0.000025 seconds (s). The file naming convention is as follows: CruiseID_Trackline#.seg (for example ERDA_92-3_5.seg). It includes the cruise identification (ERDA92-3) and trackline number.
      Source_Used_Citation_Abbreviation: ERDA-92-3*.tif
      Process_Date: 2025
      Source_Produced_Citation_Abbreviation: ERDA_92-3*.seg
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Blake F. Smullen
            Contact_Organization: Cherokee Nation System Solutions, Contractor to the U.S. Geological Survey
          Contact_Position: Student Services Contractor
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 600 4th Street South
            City: St. Petersburg
            State_or_Province: FL
            Postal_Code: 33701
          Contact_Voice_Telephone: (727) 502-8200
          Contact_Electronic_Mail_Address: bsmullen@contractor.usgs.gov
    Process_Step:
      Process_Description: Seismic processing: The SEG-Y data were processed with Seismic Unix (SU, Release 44) software to produce PDF images of the seismic profiles included in this data release. A representative data processing sequence consisted of (1) converting the SEG-Y file to SU format, (2) applying horizontal (number of traces) and vertical (TWT time) scales and generating a PostScript image of the traces, (3) converting the header file to a PostScript image then merging with the seismic profile image, and (4) converting the merged PostScript image to a PDF file. The file naming convention is as follows: CruiseID_Trackline#.pdf (for example, ERDA-92-3_5.pdf) It includes the cruise identification (ERDA92-3) and trackline number.
      Source_Used_Citation_Abbreviation: SEG-Y
      Process_Date: 2025
      Source_Produced_Citation_Abbreviation: ERDA-92-3*.pdf
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: James G. Flocks
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Emeritus
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 600 4th Street South
            City: St. Petersburg
            State_or_Province: FL
            Postal_Code: 33701
          Contact_Voice_Telephone: (727) 502-8000
          Contact_Electronic_Mail_Address: jflocks@usgs.gov
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Point
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Point
      Point_and_Vector_Object_Count: 379
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000001
      Longitude_Resolution: 0.000001
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: GRS_1980
      Semi-major_Axis: 6378137.0
      Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: ERDA_92_3_navigation.csv
      Entity_Type_Definition: Navigation file for the seismic data survey, containing date, time, and location of each shot point.
      Entity_Type_Definition_Source: USGS
    Attribute:
      Attribute_Label: Date
      Attribute_Definition: Date associated with each shot
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 08/12/1992
          Range_Domain_Maximum: 08/15/1992
    Attribute:
      Attribute_Label: HH
      Attribute_Definition: Hour value of time that shot was recorded, in 24 hour time format
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 8
          Range_Domain_Maximum: 18
    Attribute:
      Attribute_Label: MM
      Attribute_Definition: Minute value of time that shot was recorded
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 00
          Range_Domain_Maximum: 55
    Attribute:
      Attribute_Label: SS
      Attribute_Definition: Second value of time that shot was recorded
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 00
          Range_Domain_Maximum: 05
    Attribute:
      Attribute_Label: LONG_DEG
      Attribute_Definition: Longitude degree value of position of vessel when shot was recorded
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -93
          Range_Domain_Maximum: -93
    Attribute:
      Attribute_Label: LONG_DEC_MIN
      Attribute_Definition: Longitude decimal minute value of position of vessel when shot was recorded
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 45.58
          Range_Domain_Maximum: 56.21
    Attribute:
      Attribute_Label: LAT_DEG
      Attribute_Definition: Latitude degree value of location of position of vessel when shot was recorded
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 29
          Range_Domain_Maximum: 29
    Attribute:     
      Attribute_Label: LAT_DEC_MIN
      Attribute_Definition: Latitude decimal minute value of position of vessel when shot was recorded
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 37.17
          Range_Domain_Maximum: 58.87
    Attribute:    
      Attribute_Label: SHOT
      Attribute_Definition: Shot number
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 83
    Attribute:
      Attribute_Label: LINE_NUMBER
      Attribute_Definition: Line number
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 1
          Range_Domain_Maximum: 23
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
        Contact_Person: USGS SPCMSC Data Management
      Contact_Address:
        Address_Type: mailing and physical
        Address: 600 4th Street South
        City: Saint Petersburg
        State_or_Province: FL
        Postal_Code: 33701
        Country: United States
      Contact_Voice_Telephone: 727-502-8000
      Contact_Electronic_Mail_Address: gs-g-spcmsc_data_inquiries@usgs.gov
      Contact_Instructions: This data release is available online in its entirety. The SEG-Y files are downloadable from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/.
  Resource_Description: ERDA92-3*.seg, ERDA92-3*.pdf, ERDA92-3*.tif, ERDA92-3_navigagtion.csv
  Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product 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: SEG-Y
        Format_Information_Content: The SEG-Y rev. 0 format (Barry and others, 1975) presented here consists of the following: a 3,600-byte reel identification header, with the first 3,200 bytes consisting of an American Standard Code for Information Interchange (ASCII) header block followed by a 400-byte binary header block, both of which include information specific to line and reel number; a trace data block that follows the reel identification header, with the first 240 bytes of each trace block consisting of the binary trace identification header; and seismic data samples that follow the trace identification header.
        File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
        Transfer_Size: 530
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P1EQAFLT/data/ERDA92-3_SEGY.zip
    Fees: None
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Portable Document Format
        Format_Information_Content: Processed seismic profile images with axis scales and headers.
        File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
        Transfer_Size: 154
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P1EQAFLT/data/ERDA92-3_ProfilesWithScales.zip
    Fees: None
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: TIFF
        Format_Information_Content: Printable seismic profiles with headers containing cruise, line, and scanning information.
        File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
        Transfer_Size: 446
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P1EQAFLT/data/ERDA92-3_ProfilesWithHeaders.zip
    Fees: None
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: comma-delimited text
        Format_Information_Content: Cruise navigation data.
        File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
        Transfer_Size: 0.028
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P1EQAFLT/data/ERDA92-3_Navigation.zip
    Fees: None
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Portable Document Format
        Format_Information_Content: Digital scan of ERDA92-3 Logbook
        File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
        Transfer_Size: 5
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P1EQAFLT/data/ERDA92-3_Logbook.zip
    Fees: None
  Technical_Prerequisites: Use of SEG-Y data requires specialized seismic processing software, such as public domain software Seismic Unix (https://github.com/JohnWStockwellJr/SeisUnix).
Metadata_Reference_Information:
  Metadata_Date: 20250911
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
        Contact_Person: USGS SPCMSC Data Management
      Contact_Address:
        Address_Type: mailing and physical
        Address: 600 4th Street South
        City: St. Petersburg
        State_or_Province: FL
        Postal_Code: 33701
      Contact_Voice_Telephone: (727) 502-8200
      Contact_Electronic_Mail_Address: gs-g-spcmsc_data_inquiries@usgs.gov
  Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
