Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Arnell S. Forde
Publication_Date: 20250318
Title: Geospatial Navigational Data Associated with Chirp Sub-Bottom Profiles Collected During USGS Field Activity Number 2024-310-FA in 2024 from Wallops and Assawoman Islands, Virginia
Edition: 1.0
Geospatial_Data_Presentation_Form: Vector digital data (point and polyline)
Larger_Work_Citation:
Citation_Information:
Originator: Arnell S. Forde
Originator: Chelsea A. Stalk
Originator: Daniel J. Ciarletta
Originator: Jennifer L. Miselis
Publication_Date: 20250318
Title: Chirp Sub-Bottom Profile Geophysical Data Collected in 2024 From Wallops Island and Assawoman Island, Virginia
Edition: 1.0
Series_Information:
Series_Name: U.S. Geological Survey data release
Issue_Identification: doi:10.5066/P1NZ6CC2
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/P1NZ6CC2
Description:
Abstract: In June 2024, the U.S. Geological Survey (USGS) conducted a nearshore geologic assessment, including bathymetric mapping, near Wallops and Assawoman Islands, Virginia (VA). This work was performed to collect bathymetry to initialize hydrodynamic models and acquire new sub-bottom profile data to connect with existing USGS offshore lines collected along the Delmarva Peninsula, Maryland and VA, in 2015 (Sweeney and others, 2015). These newly acquired datasets will be used to help evaluate impacts of shoreface engineering activities on system ecogeomorphology. Geophysical data were collected as part of the USGS Interconnected Coastal Environments at Decadal Timescales and Coastal Sediment Availability and Flux (CSAF) projects; more information about the CSAF project can be found at https://usgs.gov/csaf. The data release associated with this metadata record serves as an archive of high-resolution chirp sub-bottom trace data and navigation files. Shapefiles (.shp) provided in the data release represent point and polyline vector datasets of Field Activity Number (FAN) 2024-310-FA chirp sub-bottom profile tracklines, start of lines, and 1,000-shot-interval locations.
Purpose: The purpose of the data release described herein is to archive and disseminate digital chirp sub-bottom profile data and associated files collected during USGS FAN 2024-310-FA. Additional survey and data details are available from the USGS Coastal and Marine Geoscience Data System (CMGDS) at https://cmgds.marine.usgs.gov/services/activity.php?fan=2024-310-FA.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20240601
Ending_Date: 20240612
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.531739
East_Bounding_Coordinate: -75.400892
North_Bounding_Coordinate: 37.864244
South_Bounding_Coordinate: 37.755383
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:9a570f9e-dc57-47ad-8c77-27e444925878
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 locations
Theme_Keyword: start of line locations
Theme_Keyword: 1,000-shot-interval locations
Theme_Keyword: barrier island mapping
Theme_Keyword: seismic reflection
Theme_Keyword: chirp
Theme_Keyword: 2024-310-FA
Place:
Place_Keyword_Thesaurus: Common Geographic Areas
Place_Keyword: United States
Place_Keyword: Virginia
Place_Keyword: North Atlantic
Access_Constraints: No access constraints. Please see 'Distribution Information' for details.
Use_Constraints: These data are marked with a Creative Common 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: 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 was provided by the USGS Coastal and Marine Hazards and Resources Program and National Aeronautics and Space Administration. The authors thank Captain Andrew Farmer of the USGS St. Petersburg Coastal and Marine Science Center (SPCMSC) for his assistance in data collection and piloting the Research Vessel (R/V) Sallenger. Field activity planning was performed by Daniel Ciarletta and Jennifer Miselis; data collection conducted by Chelsea Stalk, Jennifer Miselis, and Daniel Ciarletta; and data processing performed by Arnell Forde. This document was improved by scientific/editorial and metadata reviews from Noreen Buster and Tess Rivenbark-Terrano of the SPCMSC.
Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 11 Enterprise Version 23H2; Environmental Systems Research Institute (Esri) ArcGIS Pro 3.2.1; MacOS Sonoma 14.6.1; Seismic Unix (Release 44); PROJ.5.1.0.
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
Cross_Reference:
Citation_Information:
Originator: Sweeney, E.M.
Originator: Pendleton, E.A.
Originator: Ackerman, S.D.
Originator: Andrews, B.D.
Originator: Baldwin, W.E.
Originator: Danforth, W.W.
Originator: Foster, D.S.
Originator: Thieler, E.R.
Originator: Brothers, L.L.
Publication_Date: 2015
Title: High-resolution geophysical data collected along the Delmarva Peninsula 2015, U.S. Geological Survey Field Activity 2015-001-FA (ver. 3.0, May 2016)
Series_Information:
Series_Name: U.S. Geological Survey data release
Issue_Identification: doi:10.5066/F7P55KK3
Publication_Information:
Publication_Place: Woods Hole, Massachusetts
Publisher: U.S. Geological Survey - Woods Hole Coastal and Marine Science Center
Online_Linkage: https://doi.org/10.5066/F7P55KK3
Data_Quality_Information:
Logical_Consistency_Report: These datasets are from one field activity with consistent instrument calibrations. Seismic data were acquired during a single survey, 2024-310-FA, which occurred between June 1 and 12, 2024.
Completeness_Report: A total of 149 seismic lines were collected during this field activity. Additional survey and data details are available from the Field Activity Collection System (FACS) logs and acquisition geometry figure, which are included as supplemental information in the download file, 2024-310-FA_logs.zip.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: As the sub-bottom 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). Positions from the POS MV IANS were recorded and written to the seismic trace headers approximately every 0.20 seconds, with unique navigation fixes being recorded every second. The approximate 4-m offset between the chirp and vessel's IANS reference point has not been accounted for in the comma-delimited American Standard Code for Information Interchange (ASCII) navigation or geospatial files.
Lineage:
Process_Step:
Process_Description: Navigation information was extracted from the seismic trace headers (seismic data available from the data release) using Seismic Unix release 44 software (Cohen and Stockwell, 2010), processed with PROJ.5.1.0 software (https://proj.org/) to generate Universal Transverse Mercator (UTM) Zone 18 North (N) 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. Navigation files for each sub-bottom line, saved by line number, were concatenated into comma-delimited text files so they could be represented geospatially using geographic information system (GIS) software. The final output files are as follows: (1) 2024-310-FA_nav.csv contains unique shotpoint positions (along each line) for the entire survey, (2) 2024-310-FA_1000sht.csv includes the 1,000-shot-interval locations that were generated to correlate shot locations along the trackline with evenly spaced 1,000-shot index markers along the top of the printable profile images, and (3) 2024-310-FA_sol.csv has the start-of-line locations for each trackline. These CSV files are available from the data release, see 2024-310-FA_nav.zip.
Source_Used_Citation_Abbreviation: *.txt
Process_Date: 20240722
Source_Produced_Citation_Abbreviation: 2024-310-FA_nav.csv
Source_Produced_Citation_Abbreviation: 2024-310-FA_1000sht.csv
Source_Produced_Citation_Abbreviation: 2024-310-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
Country: USA
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: aforde@usgs.gov
Process_Step:
Process_Description: The reformatted text files referenced in the previous process step were then further processed using Esri ArcGIS Pro 3.2.1 software to generate shapefiles. The 1,000-shot navigation file, 2024-310-FA_1000sht.csv, provided in the data release was imported into ArcGIS Pro software to produce a geographic representation of the 1,000-shotpoint data collected within the survey area. The 1,000-shot-interval point shapefile (2024-310-FA_1000sht.shp) was generated to correlate shot locations with evenly spaced 1,000-shot index markers along the top of the printable profile images. Likewise, a point shapefile containing the start of line locations for all chirp tracklines, that are based on the reformatted text file, 2024-310-FA_sol.csv, was used to create 2024-310-FA_sol.shp. Finally, the 2024-310-FA_nav.csv file containing unique shotpoint positions was imported into ArcGIS Pro to produce a geographic representation of the sub-bottom profile tracklines collected within the survey area. The 'PointsToLine (Data Management)' geoprocessing tool was used to create a shapefile (2024-310-FA_trkln.shp) in which individual chirp shotpoints were connected to form tracklines. A non-proprietary version of the shapefiles was created with the 'Map To KML (Conversion)' geoprocessing tool that converted the map document layers to keyhole markup language (.kml) format prior to them being compressed (zipped) and saved as a .kmz file (2024-310-FA.kmz). All geospatial files can be found in 2024-310-FA_gis.zip.
Source_Used_Citation_Abbreviation: 2024-310-FA_1000sht.csv
Source_Used_Citation_Abbreviation: 2024-310-FA_sol.csv
Source_Used_Citation_Abbreviation: 2024-310-FA_nav.csv
Process_Date: 20240722
Source_Produced_Citation_Abbreviation: 2024-310-FA_1000sht.shp
Source_Produced_Citation_Abbreviation: 2024-310-FA_sol.shp
Source_Produced_Citation_Abbreviation: 2024-310-FA_trkln.shp
Source_Produced_Citation_Abbreviation: 2024-310-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: Vector
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0197577306
Longitude_Resolution: 0.0248912658
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:
Overview_Description:
Entity_and_Attribute_Overview: Geospatial files (2024-310-FA_gis.zip): The shapefiles created as part of this dataset are a derivative of the ASCII CSV navigation files provided in 2024-310-FA_nav.zip, which is available from the data release. The navigation and geospatial files mainly share the same attribute labels and definitions, aside from "FID" and "Shape", which are specific to the .shp files. Due to ArcGIS Pro character restrictions, the point shapefile attribute labels were changed to “DOY_HR_MIN” within the attribute tables. The detailed attribute descriptions for these files are provided in the data dictionary (DataDictionary_SBP.docx); the metadata are not complete without this file. The trackline file, 2024-310-FA_trkln.shp (149 data records), is a polyline geospatial dataset representing all the chirp sub-bottom profile tracklines; 2024-310-FA_1000sht.shp (1270 data records) is a point geospatial dataset representing the 1,000th shot interval; and 2024-310-FA_sol.shp (149 data records) provides locations for the start of each seismic line as a point geospatial dataset.
Entity_and_Attribute_Detail_Citation: The entity and attribute information were generated by the individual 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: SPCMSC Data Management Group
Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
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: gs-g-spcmsc_data_inquiries@usgs.gov
Resource_Description: 2024-310-FA_1000sht.shp, 2024-310-FA_sol.shp, 2024-310-FA_trkln.shp, 2024-310-FA.kmz
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: KML
Format_Information_Content: 2024-310-FA_gis.zip contains the survey navigation data represented geospatially using a Google Earth Keyhole Markup Language Zipped (KMZ) file, which is a non-proprietary format, and support information.
File_Decompression_Technique: Winzip or 7zip
Transfer_Size: 4.4
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P1NZ6CC2/data/2024-310-FA_gis.zip
Digital_Form:
Digital_Transfer_Information:
Format_Name: shapefile
Format_Information_Content: 2024-310-FA_gis.zip contains the survey navigation data represented geospatially using point and polyline shapefiles, which can be read by most GIS software packages, and support information.
File_Decompression_Technique: Winzip or 7zip
Transfer_Size: 4.4
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P1NZ6CC2/data/2024-310-FA_gis.zip
Fees: None
Technical_Prerequisites: The geospatial files were created for use with Esri ArcGIS Pro 3.2.1 software. They may also be viewed with QGIS (https://www.qgis.org/en/site/, 2024), Google Earth (https://earth.google.com/, 2024), or other GIS software capable of importing the data.
Metadata_Reference_Information:
Metadata_Date: 20250318
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: SPCMSC Data Management Group
Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
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: gs-g-spcmsc_data_inquiries@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998