Metadata: Identification_Information: Citation: Citation_Information: Originator: Arnell S. Forde Publication_Date: 20231101 Title: 2022-309-FA_trkln: Digital Chirp Subbottom Profile Trackline Data Collected During USGS Field Activity Number 2022-309-FA Offshore of Seven Mile Island, New Jersey, April and May 2022 Geospatial_Data_Presentation_Form: Vector Digital Dataset (Polyline) Larger_Work_Citation: Citation_Information: Originator: Arnell S. Forde Originator: Nancy T. DeWitt Originator: Emily A. Wei Originator: Jennifer L. Miselis Publication_Date: 20231101 Title: Archive of Chirp Subbottom Profile Data Collected in 2022 From Seven Mile Island, New Jersey Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P9PY4RR0 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/P9PY4RR0 Description: Abstract: From April 29 through May 2, 2022, the U.S. Geological Survey (USGS) conducted geophysical surveys to investigate the geologic controls on barrier island evolution and sediment transport offshore of Seven Mile Island, New Jersey. Geophysical data were collected as part of the Coastal Sediment Availability and Flux project. This shapefile represents a line dataset of field activity number (FAN) 2022-309-FA chirp tracklines. Purpose: To aid in the registering of digital chirp seismic reflection data collected during USGS FAN 2022-309-FA. Supplemental_Information: Additional survey and data details are available from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-309-FA and in the Field Activity Collection System (FACS) and geophysical logs, which are included in the download file, 2022-309-FA_logs.zip (Forde and others, 2023). Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20220429 Ending_Date: 20220502 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -74.781167 East_Bounding_Coordinate: -74.685219 North_Bounding_Coordinate: 39.106286 South_Bounding_Coordinate: 39.008794 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:53934158-c1e9-4931-acff-a3f7150b15a4 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme_Keyword: location 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: Theme_Keyword_Thesaurus: None Theme_Keyword: trackline Theme_Keyword: barrier island mapping Theme_Keyword: seismic reflection Theme_Keyword: 2022-309-FA Theme_Keyword: chirp Place: Place_Keyword_Thesaurus: Common Geographic Areas Place_Keyword: New Jersey Place_Keyword: North Atlantic Access_Constraints: None Use_Constraints: 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: St. 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: Data collection and processing were performed by Nancy DeWitt, Emily Wei, Jennifer Miselis, and Arnell Forde of the USGS St. Petersburg Coastal and Marine Science Center. Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 10 Version 6.2 (Build 9200); Environmental Systems Research Institute (Esri) ArcGIS 10.8.2. Data_Quality_Information: Logical_Consistency_Report: This dataset is from one field activity with consistent instrument calibrations. Completeness_Report: A total of 54 seismic lines were collected during this field activity. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Both subbottom and bathymetry data were collected aboard a towed seismic sled, which was outfitted with a Spectra Precision SP90M global navigation satellite system antenna (GNSS) receiver (to collect position information) and a single-beam echosounder. Differential positioning was obtained through post-processing the base station (established on National Geodetic Survey benchmark Permanent Identifier JU0450) data to the rover located on the sled. As the subbottom profile data were acquired, the position of the vessel was continuously determined by an SP90M GNSS receiver. Positions from the SP90M were recorded and written to the seismic trace headers every 0.20 seconds. The approximately 18-meter offset between the chirp and GPS antenna has not been accounted for in the comma-delimited American Standard Code for Information Interchange (ASCII) navigation files and trackline map. Lineage: Process_Step: Process_Description: Navigation files were extracted from the seismic trace headers using Seismic Unix release 44 software, processed with PROJ.5.1.0 software to generate Universal Transverse Mercator (UTM) coordinates from latitude and longitude coordinates (World Geodetic System of 1984, WGS84), and then saved as ASCII text files in comma-separated values (CSV) format. Process_Date: 20220929 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 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: aforde@usgs.gov Process_Step: Process_Description: The reformatted text files were imported into Esri ArcMap 10.8 software to produce a geographic representation of the subbottom profile tracklines collected within the survey area. The PointsToLine script (located in the ArcToolbox) was used to create a shapefile in which individual chirp shotpoints were connected to form tracklines. Process_Date: 20230405 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 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: aforde@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 54 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197524413 Longitude_Resolution: 0.0197524413 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: 2022-309-FA_trkln.shp Attribute Table Entity_Type_Definition: Table containing attribute information associated with the dataset. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. 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: Coordinates defining the features. Attribute: Attribute_Label: Line Attribute_Definition: Trackline name Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Line numbers were automatically assigned by the EdgeTech 512i chirp topside unit during data acquisition and are composed of a 3-digit Hypack trackline number and a 4-digit timestamp corresponding to the line's start time. The naming convention used for each subbottom line is as follows: x_env_bp, where 'x' is a 7-digit number indicating a specific trackline (for example, 002_1741) and 'env_bp' denotes that the seismic traces were output as an envelope and a bandpass filter was applied. A transit line (029_2041_transit_env_bp) had its file name manually entered and therefore did not follow the aforementioned convention. Attribute: Attribute_Label: Image Attribute_Definition: Graphics Interchange Format (GIF) image name Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: This attribute field provides the name of the subbottom profile image (.gif) that is associated with each trackline as a hyperlinked GIF; a folder containing all these .gif files, named "images", is included in 2022-309-FA_gis.zip. Overview_Description: Entity_and_Attribute_Overview: Navigation files are available as ASCII delimited text files in CSV format. The final navigation files are provided in 2022-309-FA_nav.zip (Forde and others, 2023) and represent the reprojected survey shotpoint navigation, 1,000-shot-interval locations, and start of line files. The entity and attribute information provided here describes the tabular data associated with the shapefile, 2022-309-FA_trkln.shp. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the dataset. 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 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: Shapefile, MXD, KMZ, GIF Format_Information_Content: 2022-309-FA_gis.zip contains the survey navigation data represented geospatially using a Google Earth KMZ, Esri map document (MXD), shapefiles, and a folder of processed subbottom profile images (accessible via hyperlinks included in the MXD). This metadata record describes the trackline locations provided in 2022-309-FA_trkln.shp, which is one of three Esri shapefiles included in the geographic information system (GIS) data ZIP file. File_Decompression_Technique: Winzip or 7zip Transfer_Size: 30.6 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9PY4RR0/data/2022-309-FA_gis.zip Fees: None Technical_Prerequisites: This shapefile was created for use with Esri ArcGIS 10.8 software. It may also be viewed with Esri public domain software Explorer for ArcGIS, GeoMapApp 3.6.15 (http://www.geomapapp.org, 2023), or other GIS software capable of importing the data. Metadata_Reference_Information: Metadata_Date: 20230621 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