Metadata: Identification_Information: Citation: Citation_Information: Originator: Stephen T. Bosse Originator: James G. Flocks Originator: Arnell S. Forde Publication_Date: 20201123 Title: Archive of Digitized Analog Boomer Seismic Reflection Data Collected from the Northern Gulf of Mexico: Intersea 1980 Geospatial_Data_Presentation_Form: Multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P9EFUAN3 Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9EFUAN3 Description: Abstract: The U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program (CMHRP) has actively collected geophysical and sedimentological data in the northern 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 (m) long. As part of the National Geological and Geophysical Data Preservation Program (NGGDPP, https://datapreservation.usgs.gov/), and in collaboration with the Bureau of Ocean Energy Management, Marine Minerals Program, scientists from the USGS St. Petersburg Coastal and Marine Science Center (USGS-SPCMSC) 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 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, and cruise trackline shapefiles. The HRSP data were collected using a sparker seismic system onboard the research vessel (R/V) Amarillo and R/V Sea Raider. The two vessels collected seismic data along the northern Gulf of Mexico ranging from west of Sabine Pass, Texas to south of Marsh Island, Louisiana. The survey occurred from July 9 to September 26, 1980. Data collection and processing methods are described in USGS Data Series 1047 (Bosse and others, 2017). Purpose: To archive all digitized analog boomer seismic profile data and associated files collected along the northern Gulf of Mexico, during the R/V Amarillo and R/V Sea Raider geophysical cruises. Supplemental_Information: The USGS-SPCMSC currently holds 13 major geophysical surveys from the northern Gulf of Mexico 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 Tagged Image File Format (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 Mexico 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 of Mexico 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). The seismic data were collected using a Teledyne 40-tip Mini-Sparker and Hydrophone towed parallel to each other behind the vessels. The sparker floats 5 feet (ft) beneath the surface, while the hydrophone floats between 5 and 8 ft. Sparkers create sound waves from a collapsing bubble, which is a result of vaporizing water between positive and negative leads (Trabant, 1984). The signal emitted from the sparker source is received by a 5 m-long hydrophone streamer. The received signal was amplified and filtered using a Del Norte 502 Seismic Amplifier before being displayed on an EPC recorder. The signal was also recorded on tape by a Hewlett-Packard HP-3968 FM/Direct Recorder. The seismic returns were printed onto paper rolls as two-dimensional profiles representing shots horizontally (time along track) and depth (two-way travel time). Geographic positioning of the system was collected using a long-range navigation (LORAN-C) system and annotated onto the paper copies. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19800709 Ending_Date: 19800926 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -94.0523 East_Bounding_Coordinate: -91.8722 North_Bounding_Coordinate: 29.7316 South_Bounding_Coordinate: 28.3649 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:18839f9a-c4bb-4d65-8de3-c1f204b02d21 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificinformation 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 Amarillo Theme_Keyword: R/V Sea Raider Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Gulf of Mexico Place_Keyword: Texas Place_Keyword: Louisiana Place_Keyword: Sabine Pass Place_Keyword: Holly Beach Place_Keyword: Marsh Island Access_Constraints: None. These data are held in the public domain. Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov 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 Cross_Reference: Citation_Information: Originator: Trabant, P.K. Publication_Date: 1984 Title: Applied High-Resolution Geophysical Methods Publication_Information: Publication_Place: Dordrecht, Netherlands Publisher: Springer Netherlands Online_Linkage: https://doi.org/10.1007/978-94-009-6493-8 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The validity or accuracy of sparker 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. With the exception of lines 190a, 323a, and 344b, which were not found in the archives, 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-C system. The accuracy of the LORAN-C varied from 528 to 1,320 feet (ft), with repeatable accuracy between 60 and 300 ft. Positions were recorded in latitude and longitude coordinates at various intervals and appear on the seismic profiles as incremental, hand-annotated vertical event marks. Navigation data were digitized from a trackline map in Global Mapper (v.20.1.0) and exported as a comma separated values file. 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 sparker 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 digitized navigation data were imported into Esri ArcGIS version 10.6 as point data. For mapping trackline positions the point shapefiles were converted to lines using the “make polylines from points” tool from the XTools Pro version 12.2 (build 2197) toolbar. Source_Used_Citation_Abbreviation: TIFF Process_Date: 2020 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov Process_Step: Process_Description: Cropping - The scanned TIFF images were imported into Adobe Photoshop (Ps) Creative Cloud 2019 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-DataAssociation_trackline#.tif (for example, Intersea-PWH_186.tif). It includes the cruise identification (Intersea), data association (PWH [profiles with headers] or SEGY), and trackline number (sometimes this also includes a subsection letter after the line number for tracklines split between multiple rolls). Source_Used_Citation_Abbreviation: TIFF Process_Date: 2020 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov Process_Step: Process_Description: 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 Ps, and then flattened onto the image to reduce file size. Process_Date: 2020 Source_Produced_Citation_Abbreviation: CruiseID-PWH_trackline#.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.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 is obtained by placing a guideline over the 0 ms line (water level) on the scan. It is important that horizontal lines are perpendicular to the vertical lines on the scans or the image to SEG-Y conversion will not be accurate. The distortion was corrected by using the Rectangular Marquee Tool in Adobe Photoshop 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: TIFF Process_Date: 2020 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov Process_Step: Process_Description: Image to SEG-Y - The scanned, distortion-corrected images were converted to digital SEG-Y (.seg, which has the same file extension 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 two-way travel 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). Source_Used_Citation_Abbreviation: SEG Process_Date: 2020 Source_Produced_Citation_Abbreviation: CruiseID-SEGY_trackline#.seg Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov Process_Step: Process_Description: Process_Description: Seismic processing: The SEG-Y data were processed with Seismic Unix (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 (two-way travel 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. Source_Used_Citation_Abbreviation: SEG-Y Process_Date: 2020 Source_Produced_Citation_Abbreviation: *_scale.pdf Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: James G. Flocks Contact_Organization: U.S. Geological Survey Contact_Position: Research Geologist 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: Entity Point Point_and_Vector_Object_Count: 8379 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197920992 Longitude_Resolution: 0.0225110386 Geographic_Coordinate_Units: Decimal seconds Geodetic_Model: Horizontal_Datum_Name: North American Datum 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: Intersea_Cruisepoints.shp and Intersea_nav.xlsx Entity_Type_Definition: ArcGIS shapefile and navigation file containing seismic profile data for the cruise. These attributes are all based on the point vector shapefile. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Feature ID Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Point Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude (NAD83) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 28.3649 Range_Domain_Maximum: 29.8568 Attribute_Units_of_Measure: Decimal Degrees Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude (NAD83) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -94.0523 Range_Domain_Maximum: -91.8722 Attribute_Units_of_Measure: Decimal Degrees Attribute: Attribute_Label: Time Attribute_Definition: Time at which shot was taken Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 00:00 Range_Domain_Maximum: 23:59 Attribute: Attribute_Label: JD Attribute_Definition: Julian Date Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 191 Range_Domain_Maximum: 270 Attribute: Attribute_Label: Date Attribute_Definition: Date associated with each shot Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 07/09/1980 Range_Domain_Maximum: 09/26/1980 Attribute: Attribute_Label: Line Attribute_Definition: Line number Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Alphanumeric character string representing unique line numbers ranging from 185 to 348 with sub letters designating different sections of the line. In cases where there are more sub letters associated with SEGY, PWH, and PWS files than the navigation, the lines need to be split further due to the tech issues and bad weather that left major time gaps in the record. Not having a continuous record results in poor conversions with the ImageToSEGY software. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov Contact_Instructions: This report is available online. The SEG-Y files are downloadable from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/. Resource_Description: Intersea-SEGY_*.seg, Intersea-PWH_*.tif, Intersea_nav.xlsx, Intersea_Cruisepoints.shp Distribution_Liability: This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. 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: 9858 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9EFUAN3/data/Intersea_SEGY.zip Fees: None Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: SHP, KMZ Format_Information_Content: The GIS project used to create the trackline map includes an Esri shapefile and metadata. Included in the zipped folder are the Intersea_Cruisepoints shapefile, Keyhole Markup Language (KMZ) file, and metadata. Map documents (not included) were created with Esri ArcGIS 10.6 software. The provided shapefiles may also be viewed using other versions of Esri desktop software including their free software or ArcGIS Explorer (http://www.esri.com/software/arcgis/explorer/index.html). File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users. Transfer_Size: 0.331 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9EFUAN3/data/Intersea_Cruisepoints.zip Fees: None Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: PDF Format_Information_Content: Processed seismic profile images with axis scales and headers (.pdf). File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users. Transfer_Size: 5343 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9EFUAN3/data/Intersea_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 (.tif). File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users. Transfer_Size: 13894 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9EFUAN3/data/Intersea_ProfilesWithHeaders.zip Fees: None Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: XLSX Format_Information_Content: Cruise navigation data (.xlsx). File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users. Transfer_Size: 0.469 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9EFUAN3/data/Intersea_Navigation.zip Fees: None Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: PDF Format_Information_Content: Cruise logbook (.pdf). File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users. Transfer_Size: 21 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9EFUAN3/data/Intersea_Logbook.zip Fees: None Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Format_Information_Content: Cruise trackline map (.tif). File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users. Transfer_Size: 203 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9EFUAN3/data/Intersea_TracklineMap.zip Fees: None Technical_Prerequisites: Use of SEG-Y data requires specialized seismic processing software, such as public domain software Seismic Unix (https://wiki.seismic-unix.org/doku.php). Metadata_Reference_Information: Metadata_Date: 20201116 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey Contact_Position: GIS Specialist II Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998