Trackline navigation for Edgetech 4200 sidescan sonar data collected in 2015 by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA (Esri polyline shapefile, GCS WGS 84).

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2016
Title:
Trackline navigation for Edgetech 4200 sidescan sonar data collected in 2015 by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA (Esri polyline shapefile, GCS WGS 84).
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
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: 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 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
Purpose:
This dataset contains trackline navigation for approximately 4,080 km of Edgetech sidescan sonar 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 sidescan sonar mosaic with other data in the GIS.
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: -75.891104
East_Bounding_Coordinate: -75.310611
North_Bounding_Coordinate: 37.838720
South_Bounding_Coordinate: 36.999545
Keywords:
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
Theme_Keyword: sidescan sonar
Theme_Keyword: shapefile
Theme_Keyword: trackline navigation
Theme_Keyword: survey line
Theme_Keyword: backscatter
Theme_Keyword: field activity number 2015-001-FA
Theme_Keyword: Edgetech
Theme_Keyword: Edgetech 4200
Theme_Keyword: Marine Geology
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: location
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
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: Browse_Graphic_File_Description:
Thumbnail image of sidescan sonar tracklines 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 meter line spacing to ensure 100 percent backscatter coverage. The M/V Scarlet Isabella can only survey in water depths greater than 8 meters, so there are some gaps in the mosaics 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 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:
All of the Edgetech navigation data collected during field activity 2015-001-FA are included in this shapefile and were processed with SonarWiz (version 6.01.0009). 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 and during bottom sampling between 20150714 and 20150716, 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 within 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 sidescan sonar data
Geospatial_Data_Presentation_Form: vector 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 sidescan sonar data
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 Isabella. 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 200 m apart.
Process_Step:
Process_Description:
Navigation was exported from SonarWiz (version 6.01.0009) as a CSV (Comma Separated Value) text file by selecting TOOLS and EXTRACT CSF (Chesapeake Sonar File) NAVIGATION TO TEXT FILE.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Wayne Baldwin
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 x2226
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: wbaldwin@usgs.gov
Process_Step:
Process_Description:
Python and shell scripts were used to reformat the navigation text files and add them to a geospatial SQLite (version 3.7.9) database. The processing flow for this step follows:
A. A Python script (pyReformatSidescanNav.py) was used to read and reformat CSV navigation files. The script reformatted each record to include the Julian Day (JD) with year and time, and it added fields for the survey line name, field activity number (2015-001-FA), survey vessel (M/V Scarlett Isabella) and the device used (Edgetech 4200).
B. A Python script (pySQLBSidescanNav.py) ran on each reformatted CSV file, parsing the file from each record and adding points to an SQLite database (which is created if it does not already exist). The pySQLSidescanNav script creates both point and trackline navigation for each survey line. This process populates attribute fields for the survey line ('LineName'), Year and Julian day ('Year_JD_init') survey line started, Julian day and UTC time ('JD_UTC_init') survey line started, Year and Julian day ('Year_JD_end') survey line ended, Julian day and UTC time ('JD_UTC_end') survey line ended, survey ID ('SurveyID'), survey vessel name ('VehicleID'), device used to collect the data ('DeviceID') and length field ('Length_km').
C. 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 A and B were both run within a shell script called sonarwiznavconv.
Process_Date: 20150714
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Wayne Baldwin
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 x2226
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: wbaldwin@usgs.gov
Process_Step:
Process_Description:
XTools Pro (version 12.0) for ArcGIS desktop (version 10.3) 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).
Process_Date: 20160218
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
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 520
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
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:
Detailed_Description:
Entity_Type:
Entity_Type_Label: 2015-001-FA_ssstracks
Entity_Type_Definition:
Sidescan sonar tracklines for survey 2015-001-FA along the Delmarva Peninsula.
Entity_Type_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: LineName
Attribute_Definition:
Name of the trackline along which sidescan sonar data were collected. Naming convention from Line 40 to 91 uses a format of LineNumber (i.e. 'l40') + FileNumber (i.e. 'f1') + Channels 1 and 2 ('CH-12'). Naming convention from line 92 until the end of the sidescan sonar data set use a format of LineNumber (i.e. 'L150') + Date (YYYYMMDD i.e. '20150708') + UTCTimeAtStartOfLine (HHMMSS i.e. '135305') + Channels 1 and 2 ('CH12').
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: Yr_JD_ini
Attribute_Definition:
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.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: JD_UTC_ini
Attribute_Definition:
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.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: Yr_JD_end
Attribute_Definition:
Year and Julian date at the end 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.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: JD_UTC_end
Attribute_Definition:
JulianDay:HH:MM:SS of the end 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.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: SurveyID
Attribute_Definition:
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).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: VehicleID
Attribute_Definition: Survey vessel name.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: DeviceID
Attribute_Definition: Sonar device used to collect sidescan sonar data.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set
Attribute:
Attribute_Label: Length_km
Attribute_Definition:
Length of sidescan sonar data line in kilometers (UTM Zone 18N, WGS84).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.016
Range_Domain_Maximum: 32.112
Attribute_Units_of_Measure: kilometers
Attribute_Measurement_Resolution: 0.001
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 sidescan sonar trackline data from the Delmarva Peninsula area (2015-001-FA_ssstracks.zip). The zip file contains a folder with the following shapefile: 2015-001-FA_ssstracks.shp, a browse graphic (2015-001-FA_ssstracks_browse.jpg) and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2015-001-FA_ssstracks.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: Shapefile
Format_Version_Number: Spatialite version 3.0.1
Format_Specification: Shapefile
Format_Information_Content:
The WinZip (version 14.0) file contains a shapefile of sidescan sonar 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.
File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip
Transfer_Size: 16
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Fees: none
Technical_Prerequisites:
This zip file contains data available shapefile format. The user must have software capable of reading shapefile format to use these data.
Metadata_Reference_Information:
Metadata_Date: 20170419
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: emsweeney@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

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