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. Seismic profile data, sediment samples and bottom photography were also collected in 2005.
U.S. Geological Survey, 2008, RESON_BS5M.tif - 5 meter multibeam-sonar backscatter GeoTIFF mosaic of the offshore portion of the Cape Ann to 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 Raster data set. It contains the following raster data types:
Planar coordinates are encoded using row and column
Abscissae (x-coordinates) are specified to the nearest 5.001120
Ordinates (y-coordinates) are specified to the nearest 5.001120
Planar coordinates are specified in meters
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.
| Range of values | |
|---|---|
| Minimum: | 2 |
| Maximum: | 255 |
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
The purpose of these data is to collect relative backscatter reflectance of the seafloor with a hull-mounted RESON 8101 multibeam echo sounder in the offshore survey area.
Once the data were in Newport and had been extracted to local machines, track lines were created by extracting the sounder position from the multibeam data. The tracks were reviewed to confirm that no errors in navigation existed and that the tracks extended to the outermost bounds of the survey area.
Person who carried out this activity:
401-847-4210 (voice)
401-849-1585 (FAX)
Person who carried out this activity:
508-548-8700 x2212 (voice)
505-457-2310 (FAX)
bbutman@usgs.gov
Person who carried out this activity:
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
Mosaic file (reson_5m.mos) was converted to a TIFF with the command: rawtopgm -headerskip 1024 429 699 cape_ann.mos | pnmtotiff > reson_5m.tif. The TIFF file "reson_5m.tif" was georeferenced by creating a TIFF world file (reson_5m.tfw) in a text editor and using the upper left bounding coordinates (UTM 19 WGS84) and resolution from the mosaic process.
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:
Science Applications International Corporation (SAIC), 20040430, Southern Merrimack Embayment Multibeam Survey, Survey Report: Survey Report, SAIC, Newport, Rhode Island.Online Links:
Beaudoin, J., Hughes Clarke, J.E., van den Ameele, E., and Gardner, J.,, 2002, Geometric and radiometric correction of multibeam backscatter derived from RESON 8101 systems: : Canadian Hydrographic Conference Proceedings CDROM,.Online Links:
All data collected on the R/V OceanExplorer used Differential Global Positioning System (DGPS) from U.S. Coast Guard land stations. Vessel positioning confidence checks were done by comparing the location data recorded from the POS/MV to location data recorded from the Trimble DGPS to ensure that both DGPS receivers were recording the same location at the same time.
Data are included from all main scheme and gap file survey lines with the exception of line OEMBA04076_D07. The backscatter collected along this line was not processed because of complications with merging the navigation. Data collected from patch tests and cross lines are not included in this mosaic.
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: | File contains RESON 8101 multibeam backscatter imagery from the offshore portion of the Cape Ann to Salisbury Beach Massachusetts survey area. in format TIFF (version GeoTIFF) Size: 5.6 Mb |
|---|---|
| Network links: |
http:/pubs.usgs.gov/of/2007/1373/GIS/raster/backscatter/reson_bs5m.zip |
| Media you can order: |
DVD-ROM
(Density 4.75
Gbytes)
(format UDF)
|
These data in a tiled GeoTIFF format are distributed as a compressed WinZip file. The user must have software capable of uncompressing a WinZip (ver. 9.0) file and viewing a tiled GeoTIFF image file.
508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov
