Arnell S. Forde 20231116 Vector Digital Dataset (Point) Arnell S. Forde Emily A. Wei Chelsea A. Stalk 20231116 U.S. Geological Survey data release doi:10.5066/P95M6VHT St. Petersburg, Florida U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center https://doi.org/10.5066/P95M6VHT From November 8-13, 2022, the U.S. Geological Survey (USGS) conducted geophysical surveys to investigate the geologic controls on barrier island evolution and sediment transport offshore of Boca Chica Key, Florida (FL). Geophysical data were collected as part of the Coastal Sediment Availability and Flux and Defense Advanced Research Protection Agency (DARPA) Reefense projects. This shapefile represents a point dataset of field activity number (FAN) 2022-334-FA chirp subbottom profile 1,000-shot-interval locations. To aid in the registering of digital chirp subbottom profile data collected during USGS FAN 2022-334-FA. 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=2022-334-FA and in the Field Activity Collection System (FACS) logs, which are included in the download file, 2022-334-FA_logs.zip (Forde and others, 2023). 20221108 20221113 ground condition Complete None planned -81.71190 -81.63359 24.56439 24.48579 USGS Metadata Identifier USGS:f8605d65-9e7a-4ef6-915a-c2b1f9a5ba97 ISO 19115 Topic Category geoscientificInformation oceans location USGS Thesaurus sub-bottom profiling marine geology geology coastal processes navigational data geospatial datasets None 1,000-shot-interval locations barrier island mapping seismic reflection 2022-334-FA chirp Common Geographic Areas Florida Boca Chica Key Florida Bay-Florida Keys South Atlantic None The U.S. Geological Survey requests to be acknowledged as originator of the data in future products or derivative research. Arnell S. Forde U.S. Geological Survey Geologist Mailing and physical

600 4th Street South

St. Petersburg FL 33701 USA 727-502-8000 aforde@usgs.gov Data collection and processing were performed by Chelsea Stalk, Emily Wei, and Arnell Forde of the USGS St. Petersburg Coastal and Marine Science Center. Environment as of Metadata Creation: Microsoft Windows 10 Version 6.2 (Build 9200); Environmental Systems Research Institute (Esri) ArcMap 10.8.2. The validity or accuracy of marine subbottom profiles 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. This dataset is from one field activity with consistent instrument calibrations. A total of 53 seismic lines were collected during this field activity. Due to an equipment issue, navigation data were not recorded to the seismic headers during the acquisition of line 2022_334_FA_315_031; consequently, this line has been excluded from Forde and others (2023). 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). Positions from the POS MV IANS were recorded and written to the seismic trace headers every 0.20 seconds. The approximately 3-meter 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 files and trackline map. 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. 20220929 Arnell S. Forde U.S. Geological Survey Geologist Mailing and physical

600 4th Street South

St. Petersburg FL 33701 USA 727-502-8000 aforde@usgs.gov The reformatted text files were imported into Esri ArcMap 10.8 software to produce a geographic representation of the shotpoint data collected within the survey area. A 1,000-shot-interval point shapefile was 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. 20230405 Arnell S. Forde U.S. Geological Survey Geologist Mailing and physical

600 4th Street South

St. Petersburg FL 33701 USA 727-502-8000 aforde@usgs.gov Vector Entity point 278 0.0198074623 0.0216286558 Decimal degrees WGS_1984 WGS_84 6378137.0 298.257223563 2022-334-FA_shots.shp Attribute Table Table containing attribute information associated with the dataset. U.S. Geological Survey FID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. Esri Coordinates defining the features. UTMX UTM-X easting coordinate Universal Transverse Mercator (WGS 1984, Zone 17) 427898.393 435815.022 UTMY UTM-Y northing coordinate Universal Transverse Mercator (WGS 1984, Zone 17) 2708194.163 2716865.11 Line Trackline name U.S. Geological Survey Line numbers were automatically assigned by the EdgeTech 3400 chirp topside unit during data acquisition and are composed of the FAN, Day of Year (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_334_FA_312_001) and 'env' denotes that the seismic traces were output as an envelope. Shot Shotpoint number U.S. Geological Survey 1000 22000 Lon Longitude World Geodetic System of 1984 Geographic Coordinate System -81.7119 -81.633586 Lat Latitude World Geodetic System of 1984 Geographic Coordinate System 24.485786 24.564389 YEAR Year of data acquisition U.S. Geological Survey 2022 2022 DOY_HR_MIN Day of year:hour:minute:second U.S. Geological Survey Day of year, hour, minute and second of data acquisition, in Coordinated Universal Time. Navigation files are available as ASCII delimited text files in CSV format. The final navigation files are provided in 2022-334-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, 2022-334-FA_shots.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. 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. Arnell S. Forde U.S. Geological Survey Geologist Mailing and physical

600 4th Street South

St. Petersburg FL 33701 USA (727) 502-8000 aforde@usgs.gov 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. Shapefile, MXD, KMZ, GIF 2022-334-FA_gis.zip (Forde and others, 2023) 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 1,000-shot-interval locations provided in 2022-334-FA_shots.shp, which is one of three Esri shapefiles included in the geographic information system (GIS) data ZIP file. Winzip or 7zip 33.6 https://coastal.er.usgs.gov/data-release/doi-P95M6VHT/data/2022-334-FA_gis.zip None This shapefile was created for use with Esri ArcGIS 10.8 software. It may also be viewed with QGIS (https://www.qgis.org/en/site/, 2023), GeoMapApp 3.6.15 (http://www.geomapapp.org, 2023), or other GIS software capable of importing the data. 20231016 U.S. Geological Survey Arnell S. Forde Geologist Mailing and physical

600 Fourth Street South

St. Petersburg FL 33701 USA 727-502-8000 aforde@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998