U.S. Geological Survey
2010
Survey lines along which acoustic backscatter data were acquired using a Klein 3000 sidescan sonar and a SWATHplus interferometric sonar offshore of Massachusetts within the northern Cape Cod Bay survey area (CCB_BackscatterTracklines Esri Shapefile, Geographic, WGS84).
1.0
vector digital data
Open-File Report
2010-1006
Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr20101006
http://pubs.usgs.gov/of/2010/1006/GIS/shapefile/CCB_BackscatterTracklines.zip
http://pubs.usgs.gov/of/2010/1006/html/appendix1.html
Brian D. Andrews
Seth D. Ackerman
Wayne E. Baldwin
Walter A. Barnhardt
2010
Geophysical and Sampling Data from the Inner Continental Shelf: Northern Cape Cod Bay, Massachusetts.
1.0
Open-File Report
2010-1006
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2010/1006/
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHCMSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters of coastal Massachusetts, primarily in water depths of 3-30 meters deep. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html). The data collected in the study area located in Northern Cape Cod Bay Massachusetts includes high-resolution geophysics (bathymetry, backscatter intensity, and seismic reflection), and ground validation (sediment samples, video tracklines, and bottom photographs). The data were collected during five separate surveys conducted between 2006 and 2008 and cover 480 square kilometers of the inner continental shelf.
More information about the individual USGS surveys conducted as part of the northern Cape Cod Bay project can be found on the Woods Hole Coastal and Marine Science Center Field Activity webpage:
06012: http://quashnet.er.usgs.gov/data/2006/06012/
07001: http://quashnet.er.usgs.gov/data/2007/07001/
07002: http://quashnet.er.usgs.gov/data/2007/07002/
07003: http://quashnet.er.usgs.gov/data/2007/07003/
08002: http://quashnet.er.usgs.gov/data/2008/08002/
The purpose of these data is to provide the trackline navigation and filenames of the 3,009 km of acoustic backscatter data acquired using a Klein 3000 sidescan sonar and a SWATHplus interferometric sonar in the northern Cape Cod Bay survey area.
20060816
20080507
ground condition of four separate date ranges - 20060816 to 20060823; 20070429 to 20070503; 20070725 to 20070807; 20080429 to 20080507
None planned
-70.643112
-70.112701
42.093597
41.931839
USGS Metadata Identifier
USGS:8e2f8ab0-82d8-4f12-98e9-b72bf9753dae
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Coastal and Marine Science Center
WHCMSC
Seafloor
Marine Geology
field activity serial number 06012
field activity serial number 07001
field activity serial number 07002
field activity serial number 08002
field activity number 2006-012-FA
field activity number 2007-001-FA
field activity number 2007-002-FA
field activity number 2008-002-FA
sidescan
navigation tracklines
sonar navigation
sidescan-sonar
sonar
Klein
Klein 3000
k3k
acoustic backscatter
SEA, Ltd. SWATHplus
interferometry
R/V Megan T. Miller
R/V Rafael
ISO 19115 Topic Category
oceans
location
USGS Thesaurus
navigational data
marine geophysics
geospatial datasets
None
United States
North America
Atlantic Ocean
Gulf of Maine
Cape Cod Bay
Massachusetts Bay
Duxbury
Provincetown
None
Seafloor
Surface
sea floor
None
2006
2007
2008
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 source of this information.
Brian Andrews
U.S. Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2348
508-457-2310
bandrews@usgs.gov
http://pubs.usgs.gov/of/2010/1006/GIS/browse_jpg/CCB_BackscatterTracklines.jpg
Thumbnail image of backscatter tracklines
JPEG
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.1850
Walter A. Barnhardt
Brian D. Andrews
Bradford Butman
2006
High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts
Open-File Report
2005-1293
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2005/1293/
Seth D. Ackerman
Bradford Butman
Walter A. Barnhardt
William W. Danforth
James M. Crocker
2006
High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts
Open-File Report
2006-1008
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2006/1008/
Walter A. Barnhardt
Brian D. Andrews
Seth D. Ackerman
Wayne E. Baldwin
Christopher J. Hein
2009
High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts
Open-File Report
2007-1373
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2007/1373/
Walter A. Barnhardt
Seth D. Ackerman
Brian D. Andrews
Wayne E. Baldwin
2010
Geophysical and Sampling Data from the Inner Continental Shelf: Duxbury to Hull, Massachusetts
Open-File Report
2009-1072
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2009/1072/
William W. Danforth
1997
XSonar/ShowImage: A complete system for rapid sidescan-sonar processing and display.
Open-File Report
97-686
Reston, VA
U.S. Geological Survey
http://pubs.er.usgs.gov/usgspubs/ofr/ofr97686
All attributes were checked in a consistent manner.
Any spurious data points were removed during processing. Duplicate names may exist for the FILENAME attribute because this is made up of data from multiple surveys; however further querying the data by SURVEY attribute will distinguish a unique trackline for each record in this spatial dataset.
Only the subset of sidescan-sonar trackline navigation data collected during field activities 06012 and 07001 that are within the northern Cape Cod Bay study area between Duxbury Beach and Provincetown have been included in this spatial dataset. This dataset includes all the tracklines collected during field activities 07002 and 08002.
Field activities 06012 and 07002: The Klein 3000 towfish was deployed from the stern A-frame of the R/V Megan T. Miller. Real-time kinematic (RTK) GPS navigation data were provided by an Ashtech Z-Extreme receiver (an Ashtech BR2G DGPS was used as a backup system) and recorded to the raw data files (XTF) via the Klein SonarPro (version 9.6 & 10.0) acquisition software. During some portions of the survey, technical difficulties caused the GPS systems to malfunction and lose the "fixed" RTK signal. When this occurred, the navigation system generally defaulted to a "float" RTK or DGPS signal, or the navigation was lost. When possible, surveying was halted until a reliable GPS signal was restored. A digital cable counter attached to the winch used to deploy the sidescan-sonar towfish measured changes in the amount of cable extended from the A-frame and updated the cable out parameter in SonarPro. Using the cable out value and linear offset between the A-frame and the RTK-GPS antenna (mounted mid-ship on the starboard side directly above the SWATHplus transducers), Sonar Pro calculated towfish layback positions in real time and recorded them to the XTF file headers. A conservative estimate of positional accuracy is ± 10 m, but when the navigation system was providing the "fixed" RTK signal, positional accuracy is likely < 1 m. Positional uncertainty arises because 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 07002 SEA SWATHplus backscatter: The winch used to deploy and retrieve the Klein 3000 towfish was inoperable between Aug 1-2, 2007. During this time, the acoustic backscatter collected with the 117 kHz SEA SWATHplus interferometric sonar was used to fill the gap in the Klein 3000 backscatter. The SWATHplus transducers were mounted on a rigid pole, approximately 2.6 m below the water line, along the starboard side of the R/V Megan T. Miller. Real-time kinematic (RTK) GPS navigation data were provided by an Ashtech Z-Surveyor Extreme receiver (an Ashtech BR2G DGPS was used as a backup navigation system) and recorded to the raw data files (SXR) via the SWATHplus (version 2.07) acquisition software. A conservative estimate of positional accuracy is likely <1 m.
Field activities 07001 and 08002: The Klein 3000 towfish was deployed from a davit on the port side aft on the R/V Rafael at a fixed distance that was accounted for during acquisition. Real-time kinematic (RTK) GPS navigation data were provided by an Ashtech Z-Surveyor Extreme receiver and recorded to the raw data files (XTF) via the Klein SonarPro (version 9.6 and 10.0) acquisition software. A conservative estimate of positional accuracy is ± 10 m, but when the navigation system was providing the "fixed" RTK signal, positional accuracy is likely <1 m.
Information unavailable from original metadata. Assumed to be USGS.
unknown
Information unavailable from original metadata.
This file had a source contribution, but no other source information. This information had to be modified to meet the standard.
Information unavailable from original metadata.
20060816
20080507
Information unavailable from original metadata, but assumed to be the same as the time period of content. Ground condition of four separate date ranges - 20060816 to 20060823; 20070429 to 20070503; 20070725 to 20070807; 20080429 to 20080507.
Information unavailable from original metadata.
Acoustic backscatter data acquisition for field activities 06012 and 07002: The Klein 3000 towfish was deployed from the stern A-frame of the R/V Megan T. Miller. A digital cable counter attached to the winch used to deploy the sidescan-sonar towfish measured changes in the amount of cable extended from the A-frame and updated the "cable out" parameter in SonarPro acquisition software (version 9.6). During survey 07002 The winch used to deploy and retrieve the Klein 3000 towfish was inoperable between Aug 1and 2, 2007. During this time, the acoustic backscatter collected with the 117 kHz SEA SWATHplus interferometric sonar was used to fill the gap in the Klein 3000 backscatter. The SWATHplus transducers were mounted on a rigid pole, approximately 2.6 m below the water line, along the starboard side of the R/V Megan T. Miller
Acoustic backscatter data acquisition for field activities 07001 and 08002: The Klein 3000 towfish was deployed from a davit on the port side of the R/V Rafael approximately 1 m astern and 0.5 m below the water surface.
Swath width was 100 m either side of the vessel (200 m total) for field activities 06012, 07001 and 08002. Swath width for field activity 07002 was increased to 150 m range (300 m total) because tracklines we spaced 150 m apart.
Navigation was extracted at a 1 minute interval from the raw sidescan sonar data (XTF format) in XSonar (version: 1.1) using the 'demultiplex' function (Danforth and others, 1991). The ASCII navigation from Xsonar was and concatenated for each survey (using shell scripts convertXsonarNav (no version) and Xsonar2ArcNav (no version)) into comma-separated value (CSV) text files with the following attributes: East, North, Julian Day, Line, Lon, Lat. Separate CSV files were generated for each of the four geophysical surveys.
2009
Brian Andrews
U.S. Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2348
508-457-2310
bandrews@usgs.gov
In ArcCatalog (version 9.3), the ASCII navigation file in CSV format for each survey was converted to a point feature class using ArcCatalog (version 9.3) by right-clicking on the comma separated text file -- Create Feature Class -- from XY table. {output file: "SurveyName"_k3k_navpts.shp in geographic coordinates].
2009
Brian Andrews
U.S. Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd
Woods Hole
MA
02543-1598
USA
508-548-8700 x2348
508-457-2310
bandrews@usgs.gov
VAC Extras tool (version: 2.04 FeatConv - Points to Line v2; USGS in-house software) was then used within ArcMap (version 9.3) to convert the point shapefile for each survey into a polyline shapefile. Text attributes for "Survey", "Sonar", and "Mosaic" were added to each shapefile and the values were calculated using the "Field Calculator" in the context menu in ArcCatalog (version 9.3). The backscatter tracklines from each of the four surveys were merged into one shapefile (CCB_BackscatterTracklines.shp) using the "Merge" tool in ArcToolbox (version 9.3).
2009
Brian Andrews
U.S. Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd
Woods Hole
MA
02543-1598
USA
508-548-8700 x2348
508-457-2310
bandrews@usgs.gov
Append tracklines for backscatter data collected with the SWATHplus interferometric sonar. In ArcMap (version 9.3) selected the tracklines (L67f1-L73f1 survey 07002 ) from the CCB_BathTracklines.shp where backscatter was collected with the SWATHplus interferometric sonar was used to fill the gap in the Klein 3000 backscatter and exported to a new shapefile (CCB_SWATHplus_bstracklines.shp). Reformatted shapefile attributes to match the attributes in CCB_BackscatterTracklines.shp and then appended CCB_SWATHplus_bstracklines.shp to CCB_BackscatterTracklines.shp. Using ArcCatalog (version 9.3) added the attribute Length_KM and used the "calculate geometry" context menu to calculate the length in km of each line using the UTM Zone 19N coordinate system.
CCB_BathTracklines.shp (this publication)
200912
Brian Andrews
U.S. Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2348
508-457-2310
bandrews@usgs.gov
Edits to the metadata were made to fix any errors that MP v 2.9.30 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). The format of the time period of content had to be fixed. An online link to the larger work citation had to be fixed. This file had a source contribution, but no other source information. This information had to be modified to meet the standard. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
20151120
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543
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
Crossref DOI link was added as the first link in the metadata.
20191118
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
String
643
0.000001
0.000001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
CCB_BackscatterTracklines
Tracklines for backscatter data collected in the Cape Cod Bay survey area.
USGS
FID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the features.
LINENAME
Name of sidescan-sonar file recorded along the survey line. This name is assigned by SonarPro acquisition software and is composed of Hypack survey line+ date+time. Where linename = l100f106081514400 l100f1= Hypack survey line, 060815 = year, month, day (2006, August 15), and 14400 = time stamp in UTC of start of line 14 hours, 40 minutes 0 seconds
USGS
Information unavailable from original metadata.
JD
Julian Day the data were collected
USGS
Information unavailable from original metadata.
Survey
WHCMSC field activity number
USGS
Information unavailable from original metadata.
Sonar
Type of Sonar used to collect the backscatter data
USGS
Character string of width 25
Mosaic
Identifies the lines used to as source for the final backscatter mosaic.
USGS
Character string of width 10
Length_KM
Length of the polyline feature in kilometers (calculated using UTM Zone 19, WGS84).
USGS
0.0024
9.76
kilometers (km)
Brian Andrews
U.S. Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543
USA
508-548-8700 x2348
bandrews@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.
SHP
ArcGIS 9.3
ESRI polyline shapefile
Trackline navigation for acoustic backscatter collected within the northern Cape Cod Bay survey area.
WinZip
0.541
http://pubs.usgs.gov/of/2010/1006/GIS/shapefile/CCB_BackscatterTracklines.zip
Data can be downloaded via the World Wide Web (WWW)
DVD-ROM
4.75
Gbytes
UDF
none
This zip file contains data available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have software capable of uncompressing the WinZip file and displaying the shapefile. 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.
20240318
Brian Andrews
U.S. Geological Survey
Geographer
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2348
508-457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318)
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time