U.S. Geological Survey, 2010, DH_KleinTrackline: Survey lines along which Klein 3000 sidescan-sonar data were collected by the U.S. Geological Survey offshore of Massachusetts between Duxbury and Hull.: Open-File Report 2009-1072, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, Massachusetts.This is part of the following larger work.Online Links:
- <https://pubs.usgs.gov/of/2009/1072/GIS/shapefile/DH_KleinTrackline.zip>
- <https://pubs.usgs.gov/of/2009/1072/html/appendix1.html>
Barnhardt, Walter A. , Ackerman, Seth D. , Andrews, Brian D. , and Baldwin, Wayne E. , 2010, Geophysical and Sampling Data from the Inner Continental Shelf: Duxbury to Hull, Massachusetts.: Open-File Report 2009-1072, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, Massachusetts.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
Sequential unique whole numbers that are automatically generated
Coordinates defining the features
Character string of width 30
| Range of values | |
|---|---|
| Minimum: | 2003 |
| Maximum: | 2007 |
Character string of width 4
| Range of values | |
|---|---|
| Minimum: | 0.055835 |
| Maximum: | 14.287279 |
Character string of width 10
Character string of width 25
Character string of width 25
508-548-8700 x2315 (voice)
508-457-2310 (FAX)
sackerman@usgs.gov
This dataset contains trackline navigation for approximately 1930 km of Klein 3000 sidescan-sonar data collected by the U.S. Geological Survey during two Woods Hole Science Center cruises (06012 and 07001) offshore of Massachusetts between Duxbury and Hull.
U.S. Geological Survey.
Person who carried out this activity:
(508) 548-8700x2315 (voice)
(508) 457-2310 (FAX)
sackerman@usgs.gov
Person who carried out this activity:
(508) 548-8700 x2315 (voice)
(508) 457-2310 (FAX)
sackerman@usgs.gov
Person who carried out this activity:
(508) 548-8700 x2315 (voice)
(508) 457-2310 (FAX)
sackerman@usgs.gov
Danforth, W.W., O'Brien, T.F., and Schwab, W.C., 1991, USGS image processing system: near real-time mosaicking of high-resolution sidescan-sonar data: Sea Technology Jan. 1991, Sea Technology, Arlington, VA.
Danforth, William W. , 1997, XSonar/ShowImage: A complete system for rapid sidescan-sonar processing and display.: Open-File Report 97-686, U.S. Geological Survey, Woods Hole Science Center, Woods Hole, MA.
Paskevich, V.F., 1992, Digital mapping of sidescan sonar data with the Woods Hole Image Processing System software: Open-File Report 92-536, U.S. Geological Survey, Woods Hole Science Center, Woods Hole, MA.
Paskevich, Valerie, 1996, MAPIT: An improved method for mapping digital sidescan sonar data using the Woods Hole Image Processing System (WHIPS) Software: Open-File Report 96-281, U.S. Geological Survey, Woods Hole Science Center, Woods Hole, MA.
Barnhardt, Walter A. , Andrews, Brian D. , and Butman, Bradford, 2006, High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts: Open-File Report 2005-1293, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.Online Links:
Ackerman, Seth D. , Butman, Bradford, Barnhardt, Walter A. , Danforth, William W. , and Crocker, James M. , 2006, High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts: Open-File Report 2006-1008, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.Online Links:
Barnhardt, Walter A. , Andrews, Brian D. , Ackerman, Seth D. , Baldwin, Wayne E. , and Hein, Christopher J. , 2009, High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts: Open-File Report 2007-1373, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.Online Links:
All attributes were checked in a consistent manner.
Field activity 06012: The Klein 3000 was towed from the stern A-frame of the R/V Megan T. Miller. Position data were provided by the Z-Surveyor Extreme for real-time kinematic (RTK) navigation and recorded to the raw data files (XTF) via SonarPro (version 9.6) on the sonar acquisition computer. During some portions of the survey, technical difficulties caused the GPS systems to malfunction; in some instances the acquisition systems fell back on the RTK Float or the autonomous GPS navigation; but in some cases surveying was halted until a reliable GPS signal could be achieved. Layback positions, which account for the linear distance between the shipboard RTK-GPS receiver and the towed sonar vehicle were measured by a cable counter on the winch that was used to deploy the sidescan-sonar towfish. Layback offsets were directly applied into the acquisition software so the navigation recorded in the XTF data reflect the position including the layback offset. A conservative estimate of positional accuracy is estimated to be ± 10 m although when the system was recording RTK navigation the positional accuracy is likely <1 m as RTK-GPS provides horizontal positional accuracies on the decimeter scale. Positional uncertainty arises because 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. Field activity 07001: The Klein 3000 was towed from the port side aft on the R/V Rafael at a fixed distance that was accounted for during acquisition. Position data were provided by the Ashtech Extreme for real-time kinematic (RTK) navigation and recorded to the raw data files (XTF) via SonarPro (version 10.0) on the sonar acquisition computer. A conservative estimate of positional accuracy is estimated to be ± 10 m although when the system was recording RTK navigation the positional accuracy is likely <1 m as RTK-GPS provides horizontal positional accuracies on the decimeter scale.
Only the subset of sidescan-sonar trackline navigation data collected during field activities 06012 and 07001 that are within the study area between Duxbury and Hull have been included in this spatial dataset. Trackline navigation for approximately 945 km of additional sidescan-sonar data collected south of Brant Rock, Massachusetts during these field activities will be published in a subsequent data release focused on Cape Cod Bay.
This shapefile includes trackline navigation from all the sidescan sonar data that was collected within the survey area; however only quality sonar data along the main survey lines were included in the sidescan sonar mosaic included on this report (DH_USGS_backscatter1m.tif). Sonar data from the tielines were not mosaicked.
Any spurious data points were removed during processing. Because this dataset is made up of data from multiple surveys, duplicate names may exist for the FILENAME field; however, this is very unlikely based on the file-naming scheme of "lLLfN_YYMMDDHHMMSS" where LL=line number; N=file number; YY=year; MM=month; DD=day; HH=hour; MM=minute; SS=seconds (date/time based on UTC time). Note that the underscore is sometimes omitted during acquisition and is therefore missing in the filename.
Are there legal restrictions on access or use of the data?
- 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 source of this information.
508-548-8700 x2315 (voice)
508-457-2310 (FAX)
sackerman@usgs.gov
Downloadable Data
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.
| Data format: | Trackline navigation for Klein 3000 sidescan-sonar data collected by the U.S. Geological Survey offshore of Massachusetts between Duxbury and Hull in format SHP (version ArcGIS 9.3) ESRI polyline shapefile Size: 0.2 Mb |
|---|---|
| Network links: |
<https://pubs.usgs.gov/of/2009/1072/GIS/shapefile/DH_KleinTrackline.zip> |
| Media you can order: |
DVD-ROM
(Density 4.75
Gbytes)
(format UDF)
|
This zip file contains data available in Environmental Systems Research Institute (ESRI) point shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.
508-548-8700 x2315 (voice)
508-457-2310 (FAX)
sackerman@usgs.gov
