Metadata: Identification_Information: Citation: Citation_Information: Originator: Arnell S. Forde Publication_Date: 20231101 Title: Archive of Chirp Subbottom Profile, Imagery, and Geospatial Data Collected in June 2022 Near Panama City, Florida Geospatial_Data_Presentation_Form: SEG-Y, tabular, vector, and raster digital data Larger_Work_Citation: Citation_Information: Originator: Arnell S. Forde Originator: Emily A. Wei Originator: Chelsea A. Stalk Publication_Date: 20231101 Title: Archive of Chirp Subbottom Profile Data Collected in June 2022 Near Panama City, Florida Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P9YTB22D 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/P9YTB22D Description: Abstract: As part of the Coastal Sediment Availability and Flux and Defense Advanced Research Protection Agency (DARPA) Reefense projects, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a nearshore geophysical survey to map back-barrier and lagoonal areas, as well as characterizing stratigraphy near Panama City, Florida (FL) in June 2022. The purpose of this study was to conduct a geologic assessment (including bathymetric mapping) of the environs near Panama City, FL, in support of efforts to construct an artificial, living oyster reef near Tyndall Air Force Base. This publication serves as an archive of high-resolution chirp subbottom trace data, survey trackline map, navigation files, geographic information system (GIS) data, and formal Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Processed subbottom profile images are also provided. The archived trace data are in standard Society of Exploration Geophysicists (SEG) SEG-Y revision 0 format (Barry and others, 1975). In addition to this data release, the SEG-Y files can be downloaded from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov. Purpose: The purpose of this data release is to archive digital chirp subbottom profile data and associated files collected during USGS Field Activity Number 2022-312-FA. Additional survey and data details are available from the USGS CMGDS at, https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-312-FA. Supplemental_Information: Chirp systems use a signal of continuously varying frequency; the system used during this survey produces high-resolution, shallow-penetration (typically less than 75-milliseconds [ms]) profile images of sub-seafloor stratigraphy. The towfish contains a transducer that transmits and receives acoustic energy and is typically towed 1–2 meters (m) below the sea's surface. As transmitted acoustic energy intersects density boundaries, such as the seafloor or sub-surface sediment layers, energy is reflected toward the transducer, received, and recorded by a PC-based seismic acquisition system. This process is repeated at regular intervals (for example, 0.125 seconds [s]) and returned energy is recorded for a specific duration (for example, 50 ms). In this way, a two-dimensional (2D) image of the shallow geologic structure beneath the towfish is produced. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20220620 Ending_Date: 20220630 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -85.708144 East_Bounding_Coordinate: -85.469306 North_Bounding_Coordinate: 30.149756 South_Bounding_Coordinate: 30.022867 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5e413e03-7a70-4c42-a4b3-0b8f9dc8f071 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: sub-bottom profiling Theme_Keyword: marine geology Theme_Keyword: geology Theme_Keyword: coastal processes Theme_Keyword: navigational data Theme_Keyword: geospatial datasets Theme_Keyword: field activity logs Theme_Keyword: image collections Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: distributions Theme_Keyword: physical habitats and geomorphology Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) Keywords Theme_Keyword: seismic reflection profiling Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: seismic reflection Theme_Keyword: chirp Theme_Keyword: Society of Exploration Geophysicists Theme_Keyword: SEG-Y Theme_Keyword: barrier island mapping Theme_Keyword: 2022-312-FA Place: Place_Keyword_Thesaurus: Common Geographic Areas Place_Keyword: Florida Place_Keyword: Panama City Place_Keyword: Tyndall Air Force Base Place_Keyword: Gulf of Mexico 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 the data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: Saint Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: aforde@usgs.gov Data_Set_Credit: Funding and (or) support for this study were provided by DARPA and the USGS Coastal and Marine Hazards and Resources Program. The authors thank Captains Andrew Farmer, Nancy DeWitt, and Ben Galbraith of the SPCMSC for their assistance in data collection and piloting the Research Vessel (R/V) Sallenger. This document was improved by scientific/editorial and metadata reviews from David Foster and Breanna Williams of the Woods Hole and St. Petersburg Coastal and Marine Science Centers. Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 10 Version 6.2 (Build 9200); Environmental Systems Research Institute (Esri) ArcMap 10.8.2; Seismic Unix (Release 44). Cross_Reference: Citation_Information: Originator: Barry, K.M. Originator: Cavers, D.A. Originator: Kneale, C.W. Publication_Date: 1975 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://doi.org/10.1190/1.1440530 Cross_Reference: Citation_Information: Originator: Cohen, J.K. Originator: Stockwell, J.W., Jr. Publication_Date: 2010 Title: Seismic Un*x Release No. 44: An open source software package for seismic research and processing Publication_Information: Publication_Place: Golden, Colorado Publisher: Center for Wave Phenomena, Colorado School of Mines Online_Linkage: https://github.com/JohnWStockwellJr/SeisUnix Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The validity or accuracy of marine subbottom profiles is highly qualitative and dependent on equipment and operating condition variables. Logical_Consistency_Report: These datasets are from one field activity with consistent instrument calibrations. Completeness_Report: A total of 234 seismic lines were collected during this field activity. Ten lines were excluded from this data release (Forde and others 2023), due to equipment or acquisition issues resulting in partial or unusable data files. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: As the subbottom profile data were acquired, the position of the vessel was continuously determined by an Applanix POS MV Wavemaster II inertial aided navigation system (IANS), which is accurate to within 0.5-2 meters (m). To ensure consistent spacing between survey lines acquired aboard the R/V Sallenger, pre-determined trackline locations were imported into HYPACK 2021 navigation software and followed during seismic data collection. During acquisition, positions from the POS MV IANS were recorded and written to seismic trace headers in arcseconds every 0.2 seconds and were subsequently converted to decimal degrees latitude and longitude coordinates (World Geodetic System of 1984, WGS84, realization G1150). The approximate 3-m offset between the chirp shot position and vessel's IANS reference point for the Applanix system, the Inertial Measurement Unit (IMU), were not accounted for during acquisition, nor have the American Standard Code for Information Interchange (ASCII) navigation files and trackline map been corrected to reflect the offset. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: These data are not to be used for bathymetry or navigation. Two-way travel times (TWT) shown on the printable profile images are relative to the chirp towfish position (below the sea surface), not to the sea surface. Lineage: Process_Step: Process_Description: Chirp Acquisition - Subbottom data were acquired from one survey platform, an Edgetech 3400 Portable Subbottom Profiler, which was towed by the 26-foot research vessel, the R/V Sallenger. 234 lines, equivalent to a total of 415.71 line-kilometers, were surveyed. The seismic source utilized during 2022-312-FA consisted of an EdgeTech 3400 towfish running DISCOVER version 4.09 acquisition software and towed on the port side of the vessel, approximately 3 m across-track from the IANS reference point. The data were acquired in J-STAR standard format (JSF) and SEG-Y formats at 5 hertz (Hz), which equates to a 0.20 s sample interval, using a frequency sweep of 3-8 kilohertz (kHz) and 3-16 kHz, pulse length of 20 ms, and recording length was approximately 47.34 ms. Based on survey speeds of 3.5-4.5 knots, the shot spacing was approximately 0.450 m. The binary portion of the seismic data provided in this publication (Forde and others, 2023) is stored in SEG-Y rev. 0, IBM 32-bit float [big-endian byte order] format, which is a standard digital format that can be read and manipulated by most seismic processing software packages; the first 3,200 bytes of the file header are in American Standard Code for Information Interchange (ASCII) format instead of Extended Binary Coded Decimal Interchange Code (EBCDIC) format. The SEG-Y formatted trace files have a .sgy extension and may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU) (Cohen and Stockwell, 2010). The printable profiles provided are chirp subbottom profile images that were processed using SU software. Survey Field Activity Collection System (FACS) logs, geophysical logs, and acquisition geometry are also provided as supplemental information in the download file, 2022-312-FA_logs.zip (Forde and others, 2023). Process_Date: 20220630 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Emily A. Wei Contact_Organization: U.S. Geological Survey Contact_Position: Research Geologist 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: ewei@usgs.gov Process_Step: Process_Description: Chirp processing - The EdgeTech 3400 dual frequency system recorded the subbottom data in JSF and SEG-Y rev. 1 formats. SEGY data were saved (with alternating pings supplied by each transducer) as separate files for the 3-8 kHz and 3-16 kHz frequencies. 3-8 kHz data have “A” appended to the end of the file name, for example, 2022_312_FA_001bA.sgy. The raw JSF and SEG-Y data are not provided in this data release (Forde and others, 2023) but are available on request. Using the jsf2segy software package (https://github.com/Geosvy/jsf2segy), JSF files were converted to analytic and envelope SEG-Y traces. The envelope SEG-Y files are comprised of the combined frequency data. This step was performed to make the data more accessible for users and reduce the quantity and total size of files being provided in this publication. The envelope SEG-Y data were processed with Seismic Unix (Release 44) software to produce gained Graphics Interchange Format (GIF) images of the subbottom profiles included in this data release. A representative chirp data processing sequence consisted of (1) creating the envelope seismic data file from the analytic data (envelope converted files included in this publication have "_env" appended to the line name), (2) removing raw [vessel] navigation data for each shot and converting the SEG-Y file to SU format, (3) applying automatic gain control, (4) trimming the trace data TWT to 30 ms (no observable features, aside from multiples, were encountered below that point in the profiles), (5) generating a PostScript image of the traces, and (6) converting the PostScript image to a GIF image. Source_Used_Citation_Abbreviation: *.sgy Process_Date: 20221005 Source_Produced_Citation_Abbreviation: *.gif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist 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: aforde@usgs.gov Process_Step: Process_Description: Navigation acquisition and processing - An Applanix Pos MV Wavemaster II V5 IANS with two GA830 GNSS antennas (positioned amidships) and an associated IMU was used for positioning onboard the R/V Sallenger. Real-time positions from the Applanix system were recorded and written to the seismic trace headers via a RS232 cable running from the Applanix receiver to the topside unit of the chirp system every 0.20 seconds with unique coordinate fixes being recorded every second. During subbottom processing, location data were extracted from the SEG-Y headers of the processed chirp profiles, using Seismic Unix (Cohen and Stockwell, 2010) software and output as ASCII text files; PROJ.5.1.0 (https://proj.org/) software was used to project WGS84 latitude and longitude coordinates to Universal Transverse Mercator (UTM) northings and eastings (WGS84, Zone 16 North [N], meters). Navigation files for each subbottom line, saved by line number, were concatenated into comma-delimited text files so they could be represented geospatially using Esri ArcGIS software. The final output files are as follows: (1) 2022-312-FA_nav.csv contains unique shotpoint positions (along each line) for the entire survey, (2) 2022-312-FA_1000sht.csv includes the 1,000-shot-interval locations that were generated to correlate shot locations on the trackline map with evenly spaced 1,000-shot index markers along the top of the printable profile images, and (3) 2022-312-FA_sol.csv has the start-of-line locations for each trackline. The concatenated, comma-delimited text files were later imported into ArcMap and saved as either a point or polyline file (in Esri's shapefile format) for use in the map document (.mxd) included in this archive (Forde and others, 2023). Source_Used_Citation_Abbreviation: *_env.txt Process_Date: 20221005 Source_Produced_Citation_Abbreviation: 2022-312-FA_nav.csv Source_Produced_Citation_Abbreviation: 2022-312-FA_1000sht.csv Source_Produced_Citation_Abbreviation: 2022-312-FA_sol.csv Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist 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: aforde@usgs.gov Process_Step: Process_Description: Trackline map creation - 2022-312-FA_location.mxd and associated shapefiles (.shp) were created with Esri ArcMap 10.8.2 software. The survey navigation file, 2022-312-FA_nav.csv, was imported into ArcMap and processed using the ArcScript "Points to Line" to create a polyline shapefile of the cruise tracklines called 2022-312-FA_trkln.shp. The 1,000-shot-interval and start-of-line files, 2022-312-FA_1000sht.csv and 2022-312-FA_sol.csv, were imported into ArcMap and saved as point shapefiles. A non-proprietary version of the location map was created by utilizing the ArcToolbox "Map to KML" tool, which converted each layer included in the map document (.mxd) to keyhole markup language (.kml) format prior to them being compressed (zipped) and saved as a .kmz file. The ArcGIS and Google Earth geospatial files provided in this publication are unprojected (geographic coordinates, WGS84). For detailed information about the GIS files provided in Forde and others (2023), please refer to the individual metadata records (*_metadata.txt and *.shp.xml) accompanying each shapefile and the readme file included in 2022-312-FA_gis.zip (Forde and others, 2023). Source_Used_Citation_Abbreviation: 2022-312-FA_nav.csv Source_Used_Citation_Abbreviation: 2022-312-FA_1000sht.csv Source_Used_Citation_Abbreviation: 2022-312-FA_sol.csv Process_Date: 20230801 Source_Produced_Citation_Abbreviation: 2022-312-FA_trkln.shp Source_Produced_Citation_Abbreviation: 2022-312-FA_shots.shp Source_Produced_Citation_Abbreviation: 2022-312-FA_sol.shp Source_Produced_Citation_Abbreviation: 2022-312-FA.kmz Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist 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: aforde@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197883202 Longitude_Resolution: 0.0227434348 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2022-312-FA_nav.csv (208941 data records), 2022-312-FA_1000sht.csv (924 data records), 2022-312-FA_sol.csv (224 data records). Entity_Type_Definition: These files, which are located in 2022-312-FA_nav.zip (Forde and others, 2023), represent the June 2022 subbottom navigation data. The attributes described below are for the survey's shotpoint navigation file, 2022-312-FA_nav.csv. For detailed information specific to the ArcGIS data, please see the associated shapefile metadata. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: UTMX Attribute_Definition: UTM-X coordinate (Zone 16N) Attribute_Definition_Source: Universal Transverse Mercator Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 624446.844 Range_Domain_Maximum: 647594.783 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: UTMY Attribute_Definition: UTM-Y coordinate (Zone 16N) Attribute_Definition_Source: Universal Transverse Mercator Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3322300.917 Range_Domain_Maximum: 3336130.865 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Line Attribute_Definition: Trackline name Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Line numbers were assigned by the EdgeTech 3400 chirp topside unit during data acquisition and are composed of the FAN, DOY, and trackline number. The naming convention used for each subbottom line is as follows: x_env, where 'x' is an alphanumeric number indicating a specific trackline (for example, 2022_312_FA_171_001) and 'env' denotes that the seismic traces were output as an envelope. Four track lines were manually assigned and do not follow this convention. For these files, the DOY information is excluded from the line number (for example, 2022_312_FA_001b_env). 26 test and “tie” lines (perpendicular tracklines crossing two parallel lines) also deviate from the previously described naming convention and have names such as, 2022_312_FA_172_014testDv5_env and 2022_312_FA_171_004tie_env. Attribute: Attribute_Label: Shot Attribute_Definition: Shotpoint number Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 23566 Attribute: Attribute_Label: Lon Attribute_Definition: Longitude (decimal degrees) Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -85.708144 Range_Domain_Maximum: -85.469306 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Lat Attribute_Definition: Latitude (decimal degrees) Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 30.022867 Range_Domain_Maximum: 30.149756 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: YEAR Attribute_Definition: Year of data acquisition Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2022 Range_Domain_Maximum: 2022 Attribute: Attribute_Label: DOY:HR:MIN:SEC Attribute_Definition: Day of year:hour:minute:second Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Day of year, hour, minute and second of data acquisition, in Coordinated Universal Time (UTC). Overview_Description: Entity_and_Attribute_Overview: Navigation file: Navigation files are available as ASCII delimited text files in comma-separated values file format. The final navigation files are provided in 2022-312-FA_nav.zip (Forde and others, 2023) and represent the reprojected survey shotpoint navigation, 1,000-shot-interval locations, and start of line files. Entity_and_Attribute_Overview: Binary data file: Seismic trace data are available as binary files in SEG-Y format (224 files). These files have a .sgy extension and range in size from 1.2 to 228.9 megabytes. These data are included in the download file, 2022-312-FA_segy.zip (Forde and others, 2023), and can also be found by going to the USGS CMGDS at, https://cmgds.marine.usgs.gov. The SEG-Y rev. 0 format (Barry and others, 1975) data presented here consists of the following: a 3,600-byte reel identification header, with the first 3,200 bytes consisting of an 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. Entity_and_Attribute_Overview: Graphic image file: Printable versions of the processed subbottom profiles are available as GIF images (224 files) and are included in the download file, 2022-312-FA_seisimag.zip (Forde and others, 2023). Entity_and_Attribute_Overview: GIS file: The GIS data associated with this survey are provided as a compressed zip file, 2022-312-FA_gis.zip (Forde and others, 2023), which is composed of an Esri map document, shapefiles, individual shapefile metadata, a Google Earth Keyhole Markup Language Zipped (KMZ) file, a folder of processed subbottom profile images, and a readme file. Entity_and_Attribute_Detail_Citation: The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist 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: aforde@usgs.gov Contact_Instructions: The SEG-Y files included in Forde and others (2023) are also downloadable from the Coastal and Marine Geoscience Data System at, https://cmgds.marine.usgs.gov. Distribution_Liability: This publication was prepared by an agency of the United States Government. Although these data were 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_Version_Number: Revision 0 Format_Information_Content: The ZIP file contains the SEG-Y data and support information. File_Decompression_Technique: Winzip or 7zip Transfer_Size: 8810 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9YTB22D/data/2022-312-FA_segy.zip Digital_Form: Digital_Transfer_Information: Format_Name: Comma-delimited ASCII Format_Information_Content: The ZIP file contains the survey navigation data and support information. File_Decompression_Technique: Winzip or 7zip Transfer_Size: 3.2 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9YTB22D/data/2022-312-FA_nav.zip Digital_Form: Digital_Transfer_Information: Format_Name: Shapefile, MXD, KMZ, GIF Format_Information_Content: The ZIP file contains the survey navigation data represented geospatially as GIS files (shapefile, MXD, and KMZ), a folder of processed subbottom profile images (GIF, accessible via hyperlinks included in the MXD), and supporting information. File_Decompression_Technique: Winzip or 7zip Transfer_Size: 127.9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9YTB22D/data/2022-312-FA_gis.zip Digital_Form: Digital_Transfer_Information: Format_Name: GIF Format_Information_Content: The ZIP file contains images of the processed subbottom profile data and support information. File_Decompression_Technique: Winzip or 7zip Transfer_Size: 124.9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9YTB22D/data/2022-312-FA_seisimag.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: 20231030 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist 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: aforde@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998