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>). This spatial dataset is from the Cape Ann and Salisbury Beach Massachusetts project area. They were collected in two separate surveys in 2004 and 2005 and cover approximately 325 square kilometers of the inner continental shelf. High resolution bathymetry and backscatter intensity were collected in 2004 and 2005.
U.S. Geological Survey, 2008, BATHTRACKLINES - SwathPlus and RESON Bathymetric Tracklines collected in the Cape Ann - Salisbury Beach Massachusetts Survey Area.: Open-File Report 2007-1373, 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:
Barnhardt, Walter A. , Andrews, Brian D. , Ackerman, Seth D. , Baldwin, Wayne E. , and Hein, Christopher J. , 2008, 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, 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 0.000000. Longitudes are given to the nearest 0.000000. 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.
Coordinates defining the features.
| Value | Definition |
|---|---|
| 4015 | USGS Field Activity Number 04015 |
| 5005 | USGS Field Activity Number 05005 |
Sequential unique whole numbers that are automatically generated.
| Value | Definition |
|---|---|
| 2 | R/V OceanExplorer |
| 3 | R/V Connecticut |
| Value | Definition |
|---|---|
| 1 | SEA SwathPlus Interferometric Sonar |
| 4 | RESON 8101 multibeam sonar |
Coordinates defining the features.
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
The purpose of these data is to manage the locations and filenames of the 3,870 kms of raw bathymetric files collected using the SwathPlus bathymetric sonar and RESON Multibeam sonar in the Cape Ann to Salisbury Beach survey area.
Person who carried out this activity:
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
Person who carried out this activity:
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
Person who carried out this activity:
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
Person who carried out this activity:
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
Person who carried out this activity:
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
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:
Navigation for survey 04015 used Differential Global Positioning System (DGPS) signal from U.S. Coast Guard beacons. Navigation for survey 05005 used Real Time Kinematic (RTK) GPS from a base station established by USGS for this survey. Any horizontal offsets between bathymetric sonars and GPS receiver on both survey vessels were measured and corrected in the sonar setup.
Main scheme and gap fill lines are included for the offshore area (SurveyID=4015) and does not include the cross lines run for junction analysis during the survey. Bathymetric tie lines for the nearshore area (SurveyID=5005) are included because they were collected along with the seismic profile lines offshore.
SurveyID = 4015: Additional survey lines (gap fill lines) were run where data gaps exist in shallow water between the main survey lines (main scheme lines). Duplicate line names exist for short gap fill lines. In shallow areas where several adjacent short gap fill lines were required, the sonar operator would keep collecting data in between lines because there was not enough time to stop and start new line names at 8-10 knot survey speed.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- The intended scale of these data is 1:25,000. 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.
508-548-8700 x2348 (voice)
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.
| Data format: | Trackline navigation for SwathPlus and RESON bathymetric sonars in format SHP (version ArcGIS 9.2) ESRI polyline shapefile Size: 41 Mb |
|---|---|
| Network links: |
<https://pubs.usgs.gov/of/2007/1373/GIS/shapefile/BathTracklines.zip> |
| Media you can order: |
DVD-ROM
(Density 4.75
Gbytes)
(format UDF)
|
These data are available as a shapefile in Environmental Systems Research Institute (ESRI) format. The shapefile is distributed in a compressed format as a WinZip (ver. 9.0) file. To utilize these data, the user must be able to uncompress the WinZip file and have software capable of viewing ESRI shapefiles.
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
