U.S. Geological Survey 2016 1.0 vector digital data data release DOI:10.5066/F7P55KK3 Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.5066/F7P55KK3 https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/tracklines/2015-001-FA_bathytracks.zip Edward M. Sweeney Elizabeth A. Pendleton Seth D. Ackerman Brian D. Andrews Wayne E. Baldwin William W. Danforth David S. Foster E. Robert Thieler Laura L. Brothers 2016 2.0 data release DOI:10.5066/F7P55KK3 Reston, VA U.S. Geological Survey https://doi.org/10.5066/F7P55KK3 The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy in the fall of 2012. The U.S. Geological Survey conducted cruises during the summers of 2014 and 2015 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. Geophysical data collected during the cruises include swath bathymetric, sidescan sonar, chirp and boomer seismic reflection profiles, grab sample and bottom photograph data. 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/, https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-002-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-001-FA. Data collected during the 2014 survey can be obtained here: https://doi.org/10.5066/F7MW2F60 This dataset contains trackline navigation for approximately 5,500 km of swath interferometric bathymetry data collected by the U.S. Geological Survey during cruise 2015-001-FA along the Delmarva Peninsula, MD and VA. This information can help spatially correlate the bathymetric data with other data in the GIS. 20150610 20150714 ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey) Complete None planned. -75.891093 -75.156754 37.838746 36.999545 USGS Metadata Identifier USGS:258056fd-c7b1-4039-8a5b-4cfd5de5dd11 None U.S. Geological Survey USGS Woods Hole Coastal and Marine Science Center WHCMSC Coastal and Marine Geology Program CMGP Interferometric bathymetry SWATHplus-M Bathyswath swath bathymetry shapefile trackline navigation survey line interferometry field activity number 2015-001-FA bathymetry Marine Geology ISO 19115 Topic Category oceans location USGS Thesaurus navigational data marine geophysics geospatial datasets None Atlantic Ocean Delmarva Peninsula Delaware Maryland Virginia Assateague Island Assateague Island National Seashore Chincoteague Island Chincoteague National Wildlife Refuge Chincoteague Inlet Chincoteague Bay Wallops Island Parramore Island Cobb Island Wreck Island Ship Shoal Island Myrtle Island Smith Island Fisherman Island Hog Island 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. Edward M. Sweeney U.S. Geological Survey Physical Scientist mailing and physical address

384 Woods Hole Road

Woods Hole Massachusetts 02543-1598 USA 508-548-8700 x2256 508-457-2310 emsweeney@usgs.gov https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/tracklines/2015-001-FA_bathytracks_browse.jpg Thumbnail image of swath bathymetry tracklines for Delmarva Peninsula. JPEG Elizabeth A. Pendleton Seth D. Ackerman Wayne E. Baldwin William W. Danforth David S. Foster E. Robert Thieler Laura L. Brothers 2015 3.0 webpage data release DOI:10.5066/F7MW2F60 Reston, VA U.S. Geological Survey https://doi.org/10.5066/F7MW2F60 These swath bathymetry data were collected at 200 meter line spacing. The M/V Scarlet Isabella can only survey in water depths greater than 8 meters, so there are some gaps in the survey lines where the vessel had to avoid crossing shallow shoals. Most of the gaps were planned with breaks in tracklines or maneuvers around the shoals. Most of the data were acquired roughly parallel to the orientation of Assateague Island at an average speed of 5 knots. Line numbering begins at line 1 and ends at line 183. Any spurious bathymetry navigation 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 along tie and transit lines were not included in the final grid or in the navigation shapefile. Navigation data were acquired in WGS 84 coordinate system with an Applanix Wavemaster POS MV, which blends Global Navigation Satellite Systems (GNSS) with acceleration data from a Motion Reference Unit (MRU) and GPS azimuthal heading. The POS MV uses a dual antenna array with a designated primary and secondary antenna. Positions from the primary (forward) Applanix antenna were sent via Ethernet satellite link (from a KVH Mini-VSAT Broadband receiver) to shore stations in MD and VA. Returned Radio Technical Commission for Maritime Services (RTCM) 3.1 position corrections were passed through to the Applanix Wavemaster and applied to the Submetrix System for Real Time Kinematic (RTK) position solutions (accurate to less than 1 m, horizontally). Backup Differential Global Positioning System + Wide Area Augmentation System (DGPS+WAAS), which is accurate to within 2 m horizontally, were also acquired using an Ashtech Proflex 800; however, the backup DGPS and WAAS data were not implemented into the bathymetry data since the primary POS MV positioning provided continuous data throughout the survey. Positional offsets from the primary antenna to the MRU were corrected within the BathySwath acquisition software. U.S. Geological Survey Unpublished Material vector digital data disc 20150610 20150714 ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey). raw bathymetry USGS used a 234 kHz Systems Engineering and Assessment Ltd. (SEA) SWATHplus-M (now Bathyswath) interferometric sonar pole-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 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. 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 (vers. 3.10.6.0). This step and subsequent steps were performed by Wayne Baldwin. 2015 U.S. Geological Survey Wayne Baldwin Physical Scientist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 508-548-8700 x2226 508-457-2310 wbaldwin@usgs.gov A new Computer Aided Resource Information System (CARIS) Hydrographic Information Processing System (HIPS) project (vers. 9.0.14) was created with projection information set to Universal Transverse Mercator (UTM) Zone 18N, WGS 84. 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. 2015 U.S. Geological Survey Wayne Baldwin Physical Scientist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 508-548-8700 x2226 508-457-2310 wbaldwin@usgs.gov AWK, Python and Shell scripts were used to extract and reformat the navigation fixes stored in the CARIS HIPS database and add them to a geospatial SQLite (version 3.7.9) database. The processing flow for this step follows: A. Extract navigation for each line in CARIS HDCS directory using the CARIS program printfNav for all the lines. (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 directory of TXT navigation files for each survey line in the CARIS project. B. The output TXT files from the printfNav process are parsed to remove rejected navigation records then reformatted into CSV files containing additional fields for survey ID, vessel name and system name using Shell and AWK scripts. C. A Python script (pySQLBathNav) runs on each reformatted CSV file parsing the file from each record and adding points to a SQLite database (which is created if it does not already exist). The pySQLBathNav script creates both point and trackline navigation for each survey line. D. When all of the survey lines have been processed into SQLite database, a polyline shapefile is exported from the database using the spatialite_tool command (Spatialite version 3.0.1). Steps B, C and D were all run within a shell script called printfnavconv. 2015 U.S. Geological Survey Wayne Baldwin Physical Scientist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 508-548-8700 x2226 508-457-2310 wbaldwin@usgs.gov XTools Pro (version 12.0) for ArcGIS desktop was used (TABLE OPERATIONS - TABLE RESTRUCTURE) to rename long attribute headings in the polyline shapefile's attribute table. Table attributes for the survey line ('LineName' remained the same), Year and Julian day ('Year_JD_init' was changed to 'Yr_JD_ini') survey line started, Julian day and UTC time ('JD_UTC_init' was changed to 'JD_UTC_ini') survey line started, Year and Julian day that the survey line ended ('Year_JD_end' was changed to 'Yr_JD_end'), Julian day and UTC time that the survey line ended ('JD_UTC_end' remained the same), survey ID ('SurveyID' remained the same), survey vessel name ('VehicleID' remained the same), device used to collect the data ('DeviceID' remained the same) and length field ('Length_km' remained the same). 2015 U.S. Geological Survey Edward M. Sweeney Physical Scientist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 508-548-8700 x2256 508-457-2310 emsweeney@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 Entity point 706 0.000001 0.000001 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 2015-001-FA_bathytracks Swath bathymetry tracklines for survey 2015-001-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 were collected in the format: line number (i.e. 'l1') + file number (i.e. 'f1') + bathymetry file type (i.e. '_sxp'). U.S. Geological Survey Character set Yr_JD_ini Year and Julian date at the start of the survey line in the 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 set JD_UTC_ini Julian day and UTC time at the start of the survey line in the 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 Character set Yr_JD_end Year and Julian date at the end of the survey line. U.S. Geological Survey Character set JD_UTC_end JulianDay:HH:MM:SS of the end of the survey line. U.S. Geological Survey Character set SurveyID WHCMSC field activity identifier (e.g. "2015-001-FA" where 2015 is the survey year, 001 is survey number of that year, and FA is Field Activity). U.S. Geological Survey Character set VehicleID Survey vessel name. U.S. Geological Survey Character set DeviceID Sonar device used to collect swath bathymetry. U.S. Geological Survey Character set Length_km Length of swath data line in kilometers (UTM Zone 18N, WGS84). U.S. Geological Survey 0.14 22.218 kilometers 0.001 Edward M. Sweeney U.S. Geological Survey Physical Scientist mailing and physical address

384 Woods Hole Road

Woods Hole Massachusetts 02543 USA 508-548-8700 x2256 508-457-2310 emsweeney@usgs.gov USGS data release 2015-001-FA bathymetry trackline data from the Delmarva Peninsula area (2015-001-FA_bathytracks.zip). The zip file contains a folder with the following shapefile: 2015-001-FA_bathytracks.shp, a browse graphic (2015-001-FA_bathytracks_browse.jpg) and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2015-001-FA_bathytracks.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 Spatialite version 3.0.1 Shapefile The WinZip (version 14.0) 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, 7zip, Peazip or pkUnzip 23 https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/bathymetry/tracklines/2015-001-FA_bathytracks.zip https://doi.org/10.5066/F7P55KK3 https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/ Data can be downloaded via the Internet none This zip file contains data available shapefile format. The user must have software capable of reading shapefile format to use these data. 20211119 Edward M. Sweeney U.S. Geological Survey Physical Scientist mailing and physical address

384 Woods Hole Road

Woods Hole Massachusetts 02543 USA 508-548-8700 x2256 508-457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time