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/bathymetry/2014-002-FA_bathytracks.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 Swath interferometric bathymetry 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 bathymetric data 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:871f28fd-9eaf-4fe2-87b5-4991a96f426c None U.S. Geological Survey USGS Woods Hole Coastal and Marine Science Center WHCMSC Coastal and Marine Geology Program CMGP shapefile trackline navigation survey line bathymetry WHCMSC field activity serial number 2014-002-FA M/V Scarlett Isabella swath bathymetry interferometry SEA BathySwath SEA Submetrix 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/bathymetry/Swath_tracks.png Woods Hole Coastal and Marine Science Center Swath Bathymetry 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. This shapefile includes trackline navigation from all the swath bathymetric data that was collected within the survey area. However, only quality sonar data along the main survey lines were included in the final bathymetry grid. Noisy or poor quality data were not included in the grid, but the line navigation are included in this shapefile. Data from some survey lines were omitted where they overlapped with equal or better quality data (for example lines l148f2 and l19f3 are nearly collocated and only data from l148f2 are included in the grid because attitude positioning was not useable from l19f3). Data along tie and transit lines were not included in the final grid or in the navigation shapefile. Navigation was acquired with a Coda Octopus F185 Differential Global Positioning System + Wide Area Augmentation System (DGPS+WAAS), which is accurate to + or - 1 to 2 meters, horizontally and RTK positioning from an Ashtech Proflex 800, which is accurate to less than 1-meter, horizontally. X,Y data are referenced to WGS84. The SWATHPlus transducers were mounted on a rigid pole, approximately 4.195 m below the water line, along the port side of the M/V Scarlett Isabella. The DGPS antenna and an Ashtech ProFlex 800 RTK GPS were located on the same pole approximately 4.6m above the sea surface. RTCM corrections were being delivered via the web (ethernet) to the Ashtech ProFlex 800 from shore stations in MD and VA (ethernet satellite link is from a KVH Mini-VSAT Broadband receiver). The RTK corrections were passed through to the F185R giving the submetrix system kinematic (x,y) positioning accuracy from Julian Day 170 and later. Lines (l1f1-l7f1) collected prior to 20140719 at 12:40:00 UTC were recorded with WAAS-enabled DGPS because the F185 was not receiving RTCM corrections from the Ashtech ProFlex800. Positional offsets from antennae to MRU were corrected within the SWATHPlus acquisition software. WAAS enabled DGPS accuracy is estimated to be less than 3 m and the accuracy of RTK-GPS is estimated to be less than 1 m. U.S. Geological Survey Unpublished Material vector digital data disc 20140618 20140722 ground condition; data were not collected on 20140702-20140704; 20140709; and 20140714-20140715 due to weather. raw bathymetry USGS used a 234 kHz Systems Engineering and Assessment Ltd. (SEA) SWATHplus interferometric sonar mounted on the port side of the M/V Scarlett Isabella. Survey lines were run at an average speed of 5 knots and were spaced 200 m apart in the nearshore to approximately 3-km apart in the offshore. Full data coverage was obtained for sidescan sonar data, but not for bathymetric data. The SEA SWATHplus-M operates at a frequency of 234 kHz and a variable range (increased or decreased manually depending on water depth, but generally 85 m on both sides). The system was operated with a transmit power of 80 percent, a transmit length of 43 cycles, and 4096 samples per channel. Sound-velocity profiles were collected continuously with an ODIM MVP30 moving vessel profiler. Tides were corrected using a zone tidal model with observed tides from gauges in Atlantic City, NJ; Lewes, DE; Chesapeake Bay-Bridge-Tunnel, VA; and Duck, NC. 2014-002-FA: Raw to Processed Conversion: Survey navigation information is stored within each raw (sxr) data file. Each raw SWATHPlus bathymetric sonar file (sxr) was converted to a SWATHPlus processed file (sxp) using SEA SWATHPlus Swath Processor (ver. 3.10.04). 2014 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 ependleton@usgs.gov CARIS Processing: A new Computer Aided Resource Information System (CARIS) Hydrographic Information Processing System (HIPS) project (ver. 9.0) was created with projection information set to Universal Transverse Mercator (UTM) Zone 18, WGS84. Each SWATHPlus processed file (sxp) was imported to the new CARIS project using the Import/Conversion Wizard. Navigation was checked and edited as needed using the Navigation Editor tool. 2014 Seth Ackerman U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2315 (508) 457-2310 sackerman@usgs.gov Perl and AWK (no version) programming scripts were used to extract and subsample the navigation fixes stored in the CARIS HIPS database. The processing flow for this step follows: A. Extract navigation for each line in CARIS HDCS directory using Perl script do_CARIS_nav3.pl (which runs the CARIS program printfnav for all the lines in the HDCS dir). (Extracted navigation file is tab-delimited in format YYYY-JD HH:MM:SS:FFF DD.LAT DD.LONG SSSSS_VVVVV_YYYY-JD_LLLL AR where YYYY=year, JD=Julian Day, HH=hour, MM=minute, SS=seconds, FFF=fractions of a second, DD.LAT=latitude in decimal degrees, DD.LONG=longitude in decimal degrees, SSSSS=survey name, VVVVV=vessel name, LLLL=linename, AR=accepted or rejected navigation fix) This step creates the file combined.txt B. The navigation files extracted from CARIS HIPS contained 4-5 navigation fixes per second. These files were subsampled to produce files containing 1 fix per second using AWK to remove the fractions-of-a-second from the time column then grabbing the first occurrence of each second. AWK was also used to eliminate spurious fixes outside the survey area and reformat the navigation for conversion from comma separated value (CSV) data to Esri point feature class 2014 Seth Ackerman U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700 x2315 (508) 457-2310 sackerman@usgs.gov In ArcCatalog (version 10.2), navigation text in CSV format was converted to a point feature class by right-clicking on the comma separated value text file -- Create Feature Class -- from XY table using the defined projection Geographic (Decimal_Degrees_WGS84.prj). 2014 Seth Ackerman U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA 508-548-8700 x2315 508-457-2310 sackerman@usgs.gov VAC Extras tool (version: 4.1 FeatConv - Points to Line v2; USGS in-house software) was then used within ArcMap (version 10.2) to convert the navigation points to a trackline shapefile. The 'uniqueline' field was used to define which points were used to generate each polyline feature, and the first occurrence of fields 'linename', 'yrjd', 'jd_time', 'vessel', and the last occurrence of 'jd_tim_end' were chosen to be included as attributes in the output shapefile. The trackline shapefile was checked to ensure there were no severely spurious navigation fixes. XTools Pro (version 10.2.1257) for ArcGIS desktop was used (Table Operations - Table Restructure) to reorganize and add fields to the polyline shapefile's attribute table. The length field ('Length_km') was also added and then populated using 'Calculate Geometry' (Property = Length, Use coordinate system of the data frame = WGS 1984 UTM Zone 18N, Unit = Kilometers), which can be accessed by right clicking on the attribute field name in the table view. 2014 Seth Ackerman U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA 508) 548-8700 x2315 sackerman@usgs.gov (508) 457-2310 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. 20170418 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 Entity point 39 0.000001 0.000001 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 2014_002_FA_Swath_Tracklines Swath 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. linename Name of the trackline along which swath bathymetric data was collected U.S. Geological Survey String up to 254 characters yrjd Year and julian date that data were collected in format: YYYY-JD; where Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection U.S. Geological Survey character string jd_time julian day and UTC time of data collection in format JD:HH:MM:SS. Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. U.S. Geological Survey String up to 254 characters vessel Survey vessel name U.S. Geological Survey String up to 254 characters uniqueline Unique filename; in the format YYYY_SSS_TTTTTT where YYYY is the year of the survey, SSS is the survey id number and TTTTTT is the name of the trackline along which swath bathymetric data were collected U.S. Geological Survey String up to 254 characters jd_tim_end JulianDay:HH:MM:SS of the end of line U.S. Geological Survey String up to 254 characters length_km Length of swath data line in kilometers (UTM Zone 18N, WGS84) U.S. Geological Survey 0.07 28.8144 kilometers 0.001 DeviceID Sonar device used to collect swath bathymetry U.S. Geological Survey String up to 254 characters VehicleID Survey vessel name U.S. Geological Survey String up to 254 characters SurveyID 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 String up to 254 characters 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 Swath tracklines from the Delmarva Peninsula area (2014-002-FA_Swathtracks.zip). The zip file contains a folder with the following a shapefile (2014_002_FA_Swath_Tracklines.shp), A browse graphic (Swath_tracks.png) and FGDC CSDGM metadata files (2014_002_FA_Swath_Tracklines.xml) in four standard formats are also included in the zip file. 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 swath 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/bathymetry/2014-002-FA_bathytracks.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 shapefile format. The user must have software capable of reading shapefile forrmat to use these data 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