Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2015 Title: 1-meter resolution sidescan-sonar mosaic image collected by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA in 2015 (8-bit GeoTIFF, UTM Zone 18N, WGS 84) Edition: 1.0 Geospatial_Data_Presentation_Form: remote-sensing image Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7P55KK3 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://doi.org/10.5066/F7P55KK3 Online_Linkage: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/backscatter/2015-001-FA_sss.zip Larger_Work_Citation: Citation_Information: Originator: Edward M. Sweeney Originator: Elizabeth A. Pendleton Originator: Seth D. Ackerman Originator: Brian D. Andrews Originator: Wayne E. Baldwin Originator: William W. Danforth Originator: David S. Foster Originator: E. Robert Thieler Originator: Laura L. Brothers Publication_Date: 2016 Title: High-resolution geophysical data collected along the Delmarva Peninsula 2015, U.S. Geological Survey Field Activity 2015-001-FA Edition: 2.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7P55KK3 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7P55KK3 Description: Abstract: 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 Surveys 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 Purpose: This 1-m backscatter mosaic was created from 100 kHz Edgetech sidescan sonar data. Backscatter mosaic images are useful geophysical datasets for geologic framework studies. These data can be used in conjunction with other geophysical and sample data to identify sea-floor morphology and sediment texture. Supplemental_Information: The 1-m backscatter mosaic did not need to be updated for the 2nd edition data release and has not changed since the 1st edition. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20150617 Ending_Date: 20150714 Currentness_Reference: ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey) Status: Progress: Complete Maintenance_and_Update_Frequency: None planned. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.908519 East_Bounding_Coordinate: -75.061073 North_Bounding_Coordinate: 37.854775 South_Bounding_Coordinate: 36.995183 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:a29bca86-ddc8-4311-a633-70c52bd18639 Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: Sidescan Sonar Theme_Keyword: Edgetech 4200 Theme_Keyword: backscatter Theme_Keyword: GeoTIFF Theme_Keyword: mosaic image Theme_Keyword: field activity number 2015-001-FA Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: sea-floor acoustic reflectivity Theme_Keyword: image mosaics Theme_Keyword: sidescan sonar Theme_Keyword: marine geophysics Theme_Keyword: geospatial datasets Place: Place_Keyword_Thesaurus: None Place_Keyword: Atlantic Ocean Place_Keyword: Delmarva Peninsula Place_Keyword: Delaware Place_Keyword: Maryland Place_Keyword: Virginia Place_Keyword: Assateague Island Place_Keyword: Assateague Island National Seashore Place_Keyword: Chincoteague Island Place_Keyword: Chincoteague National Wildlife Refuge Place_Keyword: Chincoteague Inlet Place_Keyword: Chincoteague Bay Place_Keyword: Wallops Island Place_Keyword: Parramore Island Place_Keyword: Cobb Island Place_Keyword: Wreck Island Place_Keyword: Ship Shoal Island Place_Keyword: Myrtle Island Place_Keyword: Smith Island Place_Keyword: Fisherman Island Place_Keyword: Hog Island Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: sea floor Stratum_Keyword: seafloor Access_Constraints: none Use_Constraints: 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. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Edward M. Sweeney Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: emsweeney@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/backscatter/2015-001-FA_sss_browse.jpg Browse_Graphic_File_Description: Thumbnail image of regional sidescan sonar mosaic for Delmarva Peninsula. Browse_Graphic_File_Type: JPEG Cross_Reference: Citation_Information: Originator: Elizabeth A. Pendleton Originator: Seth D. Ackerman Originator: Wayne E. Baldwin Originator: William W. Danforth Originator: David S. Foster Originator: E. Robert Thieler Originator: Laura L. Brothers Publication_Date: 2015 Title: High-resolution geophysical data collected along the Delmarva Peninsula 2014, U.S. Geological Survey Field Activity 2014-002-FA Edition: 3.0 Geospatial_Data_Presentation_Form: webpage Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7MW2F60 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7MW2F60 Data_Quality_Information: Logical_Consistency_Report: These sidescan sonar data were collected at 200 m line spacing to ensure 100 percent backscatter coverage. The M/V Scarlet Isabella can only survey in water depths greater than 8 m, so there are gaps in the mosaics where the vessel had to avoid crossing shoals. These gaps were planned with breaks in tracklines or maneuvers around the shoals. Most of the data were acquired roughly parallel to the orientation of the Delmarva Peninsula at an average speed of 5 knots. Line numbering in the sidescan sonar data begins with L40F1, which corresponds to the survey line where sidescan data collection began after the multi-channel seismic reflection profiling survey. Completeness_Report: Cross lines (L123-20150704_122457-CH12, L123-20150704_132335-CH12, L125-20150704_132802-CH12, L143-20150705_194038-CH12) are not included in this sidescan sonar mosaic. However, all of the other Edgetech data collected during field activity 2015-001-FA are included in this mosaic and were processed with SonarWiz versions 6.01.0009 (onboard) and 6.01.0026 (post-survey). Edgetech data were not collected during the entire survey. While regional seismic-reflection profile lines were being acquired with an S-Boom system between 20150610 and 20150618, the Edgetech 4200 remained on deck to avoid signal crosstalk and instrument entanglement. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: During Field activity 2015-001-FA, the Edgetech 4200 was towed from the stern A-frame of the M/V Scarlett Isabella. Position data were acquired using a Wide Area Augmentation System (WAAS) enabled Hemisphere Differential Global Positioning System (DGPS) receiver. Horizontal position solutions were recorded to the raw data files (JSF and XTF) via Edgetech Discover version 34.0.1.106 acquisition software (lines L40F1 to L47F1) and SonarWiz software version 6.01.0009 (lines L47F3 to L183-20150714_134804) on the sonar acquisition computer. The GPS antenna was mounted on the forward port side of the acquisition lab van. All GPS data during this survey were referenced to the WGS 84 horizontal datum. The horizontal offsets between the GPS antenna and the sheave on the A-frame were measured prior to the survey (x: +3.76 m; y: -12.76 m; z: 1.0 m). The side-scan tow cable was deployed through a 3PS digital block cable counter attached to the A-frame. Real-time cable-out measurements were transmitted via serial connection to the Discover and SonarWiz acquisition software, which calculated tow-fish layback. All horizontal offsets were applied in the acquisition software so the navigation recorded in the JSF and XTF data reflect the position including the layback offset. The layback calculations do not account for fish motion behind the vessel, which is caused by sea state and vessel speed induced changes in the angle and scope of the tow cable. DGPS horizontal positional accuracy is estimated to be within 3-5 m; WAAS enable GPS is estimated to be less than 2 m. Taking the additional fish motion and cable movement into account, as well as the mosaicking process, the positional accuracy for this dataset is estimated to be within 20 m. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished Material Title: raw interferometric data in .sxr format Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20150617 Ending_Date: 20150714 Source_Currentness_Reference: ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey). Source_Citation_Abbreviation: raw backscatter Source_Contribution: Sidescan sonar data were collected with an Edgetech 4200 dual frequency (100/410 kHz) frequency modulated sidescan-sonar towfish on the M/V Scarlet Isablella. The sonar was towed from the stern A-frame of the vessel. A 3PS digital block cable counter was used to measure the amount of tow cable deployed, and cable out values were transmitted via serial connection to the Edgetech Discover (version 34.0.1.106) acquisition software (lines L40F1 to L47F1) and SonarWiz software (version 6.01.0009) (lines L47F3 to L183-20150714_134804) on the sonar acquisition computer for layback calculation. Tracklines are generally spaced 200m apart. Process_Step: Process_Description: Raw XTF format Edgetech sidescan data (100 kHz) were imported into SonarWiz version 6.01.0009 software on the M/V Scarlet Isabella for preliminary shipboard processing. Each line received a bottom tracking correction to remove the water column at nadir. SonarWiz has an automatic bottom-tracking algorithm that generally performs well in most coastal settings. Auto tracking parameters for this survey were set to a blanking value of 4; a duration value of 2; and a threshold of 19 with line smoothing turned on. Some lines required further adjustment to the auto bottom tracking delineation, which can be addressed by manually editing the altitude line in SonarWiz. There was a 0.3 m additional altitude offset applied to the bottom tracking, in order to minimize nadir beam pattern noise in parts of the mosaic. The only gain function applied in SonarWiz during shipboard processing was an empirical gain normalization function (EGN). The Overlap Mode in the SonarWiz project was set to Cover Up, which displays backscatter data from the overlying swath line only and does not make adjustments (average, root mean square, etc.) between data in overlapping swaths. Process_Date: 20150714 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Edward M. Sweeney Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: emsweeney@usgs.gov Process_Step: Process_Description: The sidescan sonar mosaic was split into 2 separate images (north and south survey areas) and exported from SonarWiz version 6.01.0026 as 8-bit GeoTIFFs (UTM Zone 18N, WGS 84) at 1-m resolution. High backscatter values are shown by light tones and low backscatter values are shown by dark tones in the imagery. The 2 GeoTIFF images were opened in ArcMap version 10.3.1 and mosaicked into 1 GeoTIFF file using the MOSAIC TO NEW RASTER tool. A world file with the same prefix file name and .tfw extension was created in ArcMap version 10.3.1 using EXPORT RASTER WORLD FILE tool. Process_Date: 20151104 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Edward M. Sweeney Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: emsweeney@usgs.gov Process_Step: Process_Description: 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. Process_Date: 20170419 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: USGS Thesaurus keywords added to the keyword section. Process_Date: 20180720 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200908 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 94989 Column_Count: 74493 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 18N Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -75 Latitude_of_Projection_Origin: 0 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 1.0 Ordinate_Resolution: 1.0 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: There are no attributes associated with a GeoTIFF image. Pixel values for the GeoTIFF have a possible 8-bit pixel range of 0 to 255. However, the acoustic reflectivity data range from 1 to 237, with the NO DATA value at 238 (pixel values 0 and 239 to 255 fall outside the range of the data values). Low-backscatter is represented by dark tones (low values) and high-backscatter is represented by bright tones (high values). The background color is set to 238 and can be turned off without removing data values. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Edward M. Sweeney Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: emsweeney@usgs.gov Resource_Description: USGS data release 2015-001-FA backscatter mosaic from the Delmarva Peninsula area (2015-001-FA_sss.zip). The zip file contains the following a GeoTIFF image: 2015-001-FA_sss.tif, which has a TIFF world file, with the same image prefix name and a .tfw extension. A browse graphic (2015-001-FA_sss_browse.jpg) and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2015-001-FA_sss.xml) in four standard formats are also included in the zip file. Distribution_Liability: 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF Format_Version_Number: unknown Format_Specification: GeoTIFF image file Format_Information_Content: GeoTIFF image file and TFW world file derived from sonar data collected during USGS field activity 2015-001-FA. This also includes associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip Transfer_Size: 734 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/backscatter/2015-001-FA_sss.zip Network_Resource_Name: https://doi.org/10.5066/F7P55KK3 Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/ Access_Instructions: Data can be downloaded via the Internet Fees: none Technical_Prerequisites: This zip file contains GeoTIFF image files and associated metadata files. To utilize these data, the user must have software capable of viewing GeoTIFF image files. Metadata_Reference_Information: Metadata_Date: 20211119 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Edward M. Sweeney Contact_Organization: U.S. Geological Survey Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2256 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: 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. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time