2-meter Swath interferometric backscatter data collected in 2014 by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA (8-bit GeoTIFF, UTM Zone 18N, WGS 84)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2016
Title:
2-meter Swath interferometric backscatter data collected in 2014 by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA (8-bit GeoTIFF, UTM Zone 18N, WGS 84)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F7MW2F60
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: https://doi.org/10.5066/F7MW2F60
Online_Linkage:
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/backscatter/2014-002-FA_SwathBS.zip
Larger_Work_Citation:
Citation_Information:
Originator: E.A. Pendleton
Originator: S.D. Ackerman
Originator: W.E. Baldwin
Originator: W.W. Danforth
Originator: D.S. Foster
Originator: E.R. Thieler
Originator: L.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: 4.0
Geospatial_Data_Presentation_Form: document
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
Description:
Abstract:
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 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 Woods Hole Coastal and Marine Science Center 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
Purpose:
This 2-m uninterpolated SwathPlus backscatter image was created from swath interferometric data. These data, although they contain small data gaps, are included in addition to side scan sonar data due to the higher positional accuracy of these data when compared to sidescan backscatter. Backscatter data are useful geophysical datasets for geologic framework studies. These data can be used in conjunction with other geophysical and sample data to identifying sea-floor morphology and sediment texture.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20140627
Ending_Date: 20140725
Currentness_Reference:
ground condition; data were not collected on 20140702-20140704; 20140709; 20140714-20140715 due to weather
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 75.388328
East_Bounding_Coordinate: -74.906600
North_Bounding_Coordinate: 38.435211
South_Bounding_Coordinate: 37.797342
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:dbcab5e1-abd2-47b6-961e-ed635bad069f
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: interferometric backscatter
Theme_Keyword: SEA SWATHplus-M
Theme_Keyword: swath backscatter
Theme_Keyword: GeoTIFF
Theme_Keyword: interferometry
Theme_Keyword: field activity number 2014-002-FA
Theme_Keyword: backscatter
Theme_Keyword: Marine Geology
Theme_Keyword: Bathyswath
Theme_Keyword: acoustic backscatter
Theme_Keyword: BigTIFF
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sea-floor acoustic reflectivity
Theme_Keyword: image mosaics
Theme_Keyword: interferometric 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: Ocean City
Place_Keyword: Mid-Atlantic
Place_Keyword: Salisbury
Place_Keyword: Cape Henlopen
Place_Keyword: Rehoboth
Place_Keyword: Lewes
Place_Keyword: Delaware Bay
Place_Keyword: Isle of Wight
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: Hog Island
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: sea floor
Stratum_Keyword: seafloor
Access_Constraints: None
Use_Constraints:
Not to be used for navigation. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Contact_Voice_Telephone: (508) 548-8700x2259
Contact_Facsimile_Telephone: (508)-457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/backscatter/2014_002_FA_SwathBS_2m_100.png
Browse_Graphic_File_Description:
thumbnail image of SwathPlus backscatter data for the Delmarva Peninsula
Browse_Graphic_File_Type: PNG
Data_Set_Credit: U.S. Geological Survey
Native_Data_Set_Environment:
Microsoft Windows Version 7.0 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.1850
Data_Quality_Information:
Logical_Consistency_Report:
This image represents uninterpolated swath interferometric backscatter data at 2.0 meter resolution. The swath width of the interferometric sonar is limited by water depth and other oceanographic conditions like changes in the speed of sound due to salinity, temperature, and stratification. 100 percent overlap was not achieved in all areas of the survey. Small data gaps exist due to the limited range of the sonar, and these gaps were left unfilled in the mosaic. Trackline artifacts associated with NADIR and acquisition parameters can also be seen in the mosaic.
Completeness_Report:
Survey line bathymetry data that were collected within the Delmarva survey area were incorporated in this grid with the exception of the lines listed below. These lines were left out of the final mosaic either because the data quality were poor, the lines were duplicated or superseded by another line of better data quality, the line was a jog around a shoal and was redundant, or their contribution to the final product was not significant, such as the widely spaced (3 km) boomer seismic lines. l1f1-f3; l2f1-f5; l3f1-f3; l5f3; l4f1-f4; l5f1-f2; l6f1-f2; l7f1-f5; l8f1-f3; l9f1-f3; l10f1-f5;l11f1-f2; l12f1-f3; l13f1-f3; l12f1-f4; l15f1-f3; l16f1-f2; l17f1-f3; l19f1-l19f8; l20f-l20f8; l21f1-f8; l22f1-f7; l23f1-f8; l23f1-f8; l24f1-f7; l25f1-f2 ;l26f; l27f1-f2; l28f1; l29f1-f2; l30f1-f2; l31f1; l32f1-f2; l33f1; l34f1-f2; l35f1;l36f1-f2; l37f1; l38f1-f2; l39f1; l40f1-f3; l41f1;l42f1-f2; l43f1; l44f1-f2; l50f10; l51f1-l5f4; l52f1-l52f2; l100f1-l100f3; l96f1; l103f3; l155f2; l163f3; and t1f1-t13f1.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
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 4.6 m 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 SWATHplus 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.
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: 20140618
Ending_Date: 20140722
Source_Currentness_Reference:
ground condition; data were not collected on 20140702-20140704; 20140709; 20140714-20140715 due to weather
Source_Citation_Abbreviation: raw backscatter
Source_Contribution:
USGS used a 234 kHz Systems Engineering and Assessment Ltd. (SEA) SWATHplus interferometric sonar (now BathySwath) mounted on the port side of the M/V Scarlett Isabella. The motion reference unit was located on the head of the transducer.
Survey lines were run at an average speed of 5 knots and were spaced 200 m apart in the nearshore. The SEA SWATHplus-M (BathySwath-1) operates at a frequency of 234 kHz and a variable range (increased or decreased manually depending on water depth, but generally 85-100 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.
Process_Step:
Process_Description:
Each raw BathySwath bathymetric sonar file (sxr) was 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. 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 root mean square (RMS), which displays backscatter data in overlapping areas using an RMS adjustment.
Process_Date: 20140730
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: (508) 548-8700x2259
Contact_Facsimile_Telephone: (508)-457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
The interferometric backscatter mosaic was exported from SonarWiz version 6.01.0026 as an 8-bit GeoTIFF (UTM Zone 18N, WGS 84) at 2-m resolution. High backscatter values are shown by light tones and low backscatter values are shown by dark tones in the imagery. 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: 20150730
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508)-548-8700x2259
Contact_Facsimile_Telephone: (508)-457-2310
Contact_Electronic_Mail_Address: ependleton@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: 20170418
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
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18 N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75
Latitude_of_Projection_Origin: 0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 2
Ordinate_Resolution: 2
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 53. Low-backscatter is represented by dark tones (low values) and high-backscatter is represented by bright tones (high values). In this TIFF format, the NODATA values are represented as NODATA.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
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) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Resource_Description:
USGS data release 2014-002-FA interferometric backscatter from the Delmarva Peninsula area (2014-002-FA_SwathBS.zip). The zip file contains the following a GeoTiff image in BigTIFF format: (2014-002-FA_SwathBS_2m.tif) with a world file (2014-002-FA_SwathBS_2m.tfw). A browse graphic (2014_002_FA_SwathBS_2m_100.png) and FGDC CSDGM metadata files (2014_002_FA_SwathBS_2m.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: ArcMap version 10.3.1
Format_Specification: GeoTIFF image (BigTIFF format)
Format_Information_Content:
The zip file (WinZip v 14.5) contains a folder with a GeoTIFF image at 2-meter resolution and the associated metadata and world files
File_Decompression_Technique: Use WinZip or pkUnzip
Transfer_Size: 74
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/backscatter/2014-002-FA_SwathBS.zip
Network_Resource_Name:
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/
Network_Resource_Name: https://doi.org/10.5066/F7MW2F60
Fees: None
Custom_Order_Process: none
Technical_Prerequisites:
The image contained in the ZIP file is available as BigTIFF GeoTIFF image with a world file. To utilize these data, the user must have an image viewer, or an image processing or GIS software package capable of importing a BigTIFF image. This image may not open in older GIS software (earlier than version 10.0)
Metadata_Reference_Information:
Metadata_Date: 20200908
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2259
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/field_activities/2014_002_fa/2014_002_FA_SwathBS_2m.html>
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