U.S. Geological Survey 2015 1.0 vector digital data data release DOI:10.5066/F7MW2F60 Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.5066/F7MW2F60 https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/tracks/2014-002-FA_512tracks.zip Elizabeth A. Pendleton S.D. Ackerman W.E. Baldwin W.W. Danforth D.S. Foster E.R. Thieler L.L. Brothers 2015 2.0 view data release DOI:10.5066/F7MW2F60 Reston, VA U.S. Geological Survey https://doi.org/10.5066/F7MW2F60 The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework that governs coastal system evolution at storm-event and longer timescales. Data collected during the 2014 cruise include swath bathymetry, sidescan sonar, chirp and boomer seismic-reflection profiles, acoustic Doppler current profiler, and sample and bottom photograph data. Processed data in raster and vector format are released here for the swath bathymetry, sidescan sonar, and seismic-reflection profiles. More information about the USGS survey conducted as part of the Hurricane Sandy Response-- Geologic Framework and Coastal Vulnerability Study can be found at the project website or on the WHCMSC Field Activity Web pages: https://woodshole.er.usgs.gov/project-pages/delmarva/ and https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-002-FA This dataset contains trackline navigation for approximately 4500 km of 512i chirp seismic-reflection data collected by the U.S. Geological Survey during cruise 2014-002-FA along the Delmarva Peninsula, MD and VA. This information can help spatially correlate the seismic-reflection profiles with other data in the GIS. 20140618 20140722 ground condition; data were not collected on 20140702-20140704; 20140709; and 20140714-20140715 due to weather. Complete None planned -75.567695 -74.687529 38.430403 37.538209 USGS Metadata Identifier USGS:4a6cc72f-a35d-4cec-913b-ba232a9b4542 None U.S. Geological Survey USGS Woods Hole Coastal and Marine Science Center WHCMSC Coastal and Marine Geology Program CMGP seismic profile trackline navigation seismic navigation seismic reflection WHCMSC field activity serial number 2014-002-FA M/V Scarlett Isabella chirp 512i Esri shapefile EdgeTech SB-512i Sub-bottom Profiler ISO 19115 Topic Category location oceans geoscientificInformation USGS Thesaurus navigational data marine geophysics geospatial datasets None North America Atlantic Ocean United States Maryland Delaware Virginia Assateague Island Ocean City Wallops Island Parramore Island Chincoteague Island Chincoteague Bay Delaware Bay Assateague Island National Seashore Chincoteague National Wildlife Refuge Isle of Wight Bay Fenwick Island Assawoman Bay Cape Henlopen Rehoboth Beach Delaware Seashore State Park Bethany Beach Toms Cove Berlin None Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Elizabeth A. Pendleton U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA 508-548-8700 x2259 508-457-2310 ependleton@usgs.gov https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/tracks/512_tracks.png Woods Hole Coastal and Marine Science Center 512i tracklines along the Delmarva Peninsula PNG Microsoft Windows 7 Enterprise Service Pack 1; ArcGIS Desktop 9.3 Service Pack 1; Build 1850 Any spurious data points were removed during processing. For each seismic trackline there is one seismic-profile image that is hyperlinked by the field 'image'. No duplicates exist. Sections of tracklines where navigation was recorded but no seismic data were logged are not included such as turns and transits. Differential Global Positioning System (DGPS) navigation data were acquired with a Hemisphere receiver and recorded with HYPACK (www.hypack.com). The DGPS antenna was located on the port-side of the acquisition van. The SB-0512i was mounted on a catamaran sled and towed at the sea surface approximately 43 m astern of the M/V Scarlett Isabella. Fish depth below water line was 0.5 meters below catamaran floats. The GPS offset from sheave was x = 8.75 m; y = -43 m; z = 0. Navigation data were sent to SonarWiz (version 5) acquisition application and offsets were recorded in the acquisitions software, which logged the coordinates to individual trace headers SEG-Y and JSF format. Positional accuracy is assumed to be better than 10 m and is primarily related to changes in cable-out related to fish and sled motion behind the boat. U.S. Geological Survey 2015 vector digital data disc 20140618 20140722 ground condition; data were not collected on 20140702-20140704; 20140709; and 20140714-20140715 due to weather. SEG-Y and JSF 512i data Chirp seismic data were collected using an EdgeTech Geo-Star FSSB sub-bottom profiling system and an SB-0512i towfish (0.5-12 kHz), which was mounted on a catamaran and towed astern of the M/V Scarlett Isabella of Cape May, NJ. Chesapeake Technologies' SonarWiz (v.5.00.0015) seismic acquisition software was used to control the Geo-Star topside unit, digitally log trace data in the SEG-Y Rev. 1 format (IEEE floating point) and JSF format, and record GPS navigation coordinates to the SEG-Y trace headers (in arc seconds of Latitude and Longitude, multiplied by a scalar of 100). Data were acquired using a 250 ms shot rate, a 5-ms pulse length, and a 0.5 to 8 kHz frequency sweep. Recorded trace lengths were approximately 180 ms. Scripts within SIOSEIS (version 2010.2.25) and Seismic Unix (version 4.2) were used to process SEG-Y data, create navigation files, and plot images. The processing flow and scripts used to produce layback corrected navigation files including trackline shapefiles and shotpoints are summarized below and in the following processing steps. 1. SIOSEIS (version 2010.2.25) was used to read SEG-Y files, renumber shots starting from one, and write out new SEG-Y files. The original shot numbers, which were assigned by SonarWiz sequentially over the duration of an acquisition session despite SEG-Y file changes, are preserved in the raw SEG-Y data. 2. Sio_medianstk was used to remove S-boom cross talk (when multi-channel streamer lines were recorded simultaneously: Julian Day 169-178) with a two-trace median stack and improve water bottom picking. This script was used for all lines even after multi-channel streamer was turned off, due to the improvements made to water bottom picks. 3. Read512i_mstk was used to read median filtered stacked and renumbered SEG-Y files, write a Seismic Unix file, and extract SEG-Y trace header information, including shot number, longitude, latitude, year, Julian day, and time of day (UTC). Header information from each SEG-Y file was saved to text files after an AWK (no version) filter was used to maintain the first and last shots, shots at multiples of 100, and shots with unique navigation coordinates. Geographic coordinates (WGS84) were converted to UTM zone 18 coordinates (WGS84) using Proj (version 4.6.0). End shots and shots at multiples of 100 may not have unique navigation coordinates. Separate text files containing the first and last shots and even 500 shot intervals were also saved. A 500 shot interval was chosen because it corresponds to the annotation interval provided along the top of the seismic-reflection profile images, which are included in the folders within 'seis_images\512i'. 2014 Dave Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2271 (508) 457-2310 dfoster@usgs.gov A Python (version 2.7) script was used to apply layback to seismic navigation acquired during the 2014-002-FA survey. Attributes oldEast and oldNorth in the table ‘2014_002_512i_lbunique.csv', which is included in the zip compressed version of the shapefile ‘2014-002-FA_512i_500sht.shp', document pre-layback shot/trace positions. Using Easting and Northing coordinates (UTM Zone 18 N, WGS84) from the trace headers, the script calculated easting and northing differential values between consecutive trace positions. Headings between consecutive traces were calculated using the arctangent function (arctan2(dy,dx)), and reciprocal back bearings were determined using a lookup table. Back bearings were smoothed along track using a moving median function with a window length defined by the user (59 traces during 2014-002-FA ). Layback easting and northing offsets were calculated by multiplying the linear distance between the catamaran and the shipboard DGPS receiver (33 for line 1 or 43 m for all other lines during 2014-002-FA) by the sine and cosine of the smoothed back bearing, respectively. Offset values were then added to the original coordinates to produce layback positions. 2014 Dave Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2271 (508) 457-2310 dfoster@usgs.gov An awk (do_nav_gisprep) script was used to process unique, 100 shot, and 500 shot lay-back corrected navigation to a merged csv file that can be utilized by ArcGIS to create a trackline and shotpoint shapefile. Text files containing unique shot point positions for each seismic line with layback-adjusted navigation were concatenated into a comma-delimited text file. Then the layback-corrected position CSV file was imported into ArcMap (version 10.2.2) using 'Add XY data' and saved as points (Geographic, WGS84) in the Esri shapefile format. 2014 Dave Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2271 (508) 457-2310 dfoster@usgs.gov The shapefile containing unique shot point positions, created in the previous step, was used as an input for VACExtras points to lines (version 2.1), a VB collection of tools developed by VeeAnn Cross (USGS-WHCMSC), which converts point data to a new polyline shapefile ('2014_002_FA_512i_Tracklines.shp'), based on record order. The 'FileName' field was used to define which points were used to generate each polyline feature. The length of each polyline segment was calculated and included in the attribute field 'Length_km', specifying UTM, Zone 18 N, WGS84, and kilometers with ArcMap version 10.2.2. Additional fields for vessel name, device and survey ID were added in ArcMap 2014 Dave Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA (508) 548-8700x2271 508-457-2310 dfoster@usgs.gov The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. 20170419 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov USGS Thesaurus keywords added to the keyword section. 20180720 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20200908 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Vector Complete chain 407 0.000001 0.000001 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 2014_002_FA_512i_Tracklines 512i tracklines for survey 2014-002-FA along the Delmarva Peninsula 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. FileName Name of seismic data file. U.S. Geological Survey String up to 254 characters Image name of seismic profile image used as hyperlink U.S. Geological Survey String up to 254 characters Shot First shot number in seismic profile U.S. Geological Survey 1 1 shot 1 Year Calendar year data were collected U.S. Geological Survey String up to 254 characters Time_UTC JulianDay:HH:MM:SS of the start of line. Julian day data were collected (Julian day is the integer number representing the interval of time in days since January 1 of the year) U.S. Geological Survey String up to 254 characters Shot_end Last shot number in seismic profile U.S. Geological Survey 407 40509 shot 1 Time_U_end JulianDay:HH:MM:SS of the end of line. Julian day is the integer number representing the interval of time in days since January 1 of the year. U.S. Geological Survey String up to 254 characters length_km Length of seismic profile in kilometers (UTM Zone 18N, WGS84) U.S. Geological Survey 0.215 45.0392 kilometers 0.001 Survey_ID WHCMSC field activity identifier (e.g. "2014-002-FA" where 2014 is the survey year, 002 is survey number of that year, and FA is Field Activity) U.S. Geological Survey Character String Device_ID Sonar device used to collect seismic-reflection data U.S. Geological Survey String up to 254 characters Vehicle_ID Survey vessel name U.S. Geological Survey String up to 254 characters The PNG seismic reflection images can be hyperlinked to their trackline location in ArcGIS. U.S. Geological Survey Elizabeth A. Pendleton U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2259 (508) 457-2310 ependleton@usgs.gov USGS data release 2014-002-FA 512i tracklines from the Delmarva Peninsula area (2014-002-FA_512tracks.zip). The zip file contains a folder with the following a shapefile with 512i trackline locations (2014_002_FA_512i_Tracklines.shp), a browse graphic (512_tracks.png), and FGDC CSDGM metadata files (2014_002_FA_512i_Tracklines.xml) in four standard formats. Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Shapefile ArcGIS 10.2.2 Shapefile WinZip (v 14.5) file contains a shapefile of 512i tracklines collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA, and the associated metadata. use WinZip or pkUnzip 18 https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/tracks/2014-002-FA_512tracks.zip https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/ https://doi.org/10.5066/F7MW2F60 Data can be downloaded via the World Wide Web (WWW) none This zip file contains data available in shapefile format. The user must have software capable of reading and processing the data file. 20240318 Elizabeth Pendleton U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2259 (508) 457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None