Seth Ackerman
2006
Backscatter Imagery from Sidescan Sonar 5 meter/pixel of Boston Harbor and Approaches (bh_5mBS.tif)
remote-sensing image
Open-File Report
2006-1008
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr20061008
https://pubs.usgs.gov/of/2006/1008/gis/datazipped/bh_5mbs.zip
Ackerman, S.D.
Butman, B.
Barnhardt, W.A.
Danforth, W.W.
Crocker, J.M.
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
1 DVD-ROM
https://pubs.usgs.gov/of/2006/1008/
These data are high-resolution acoustic backscatter measurements of the seafloor from Boston Harbor and the harbor approaches, Massachusetts. Approximately 170 kmĀ² of sidescan sonar data were collected by the National Oceanic and Atmospheric Administration (NOAA) Ship Whiting in 2000 and 2001 and reprocessed by the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS).
These data were collected by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS) branch as part of their periodic hydrographic mapping for nautical charting. The raw datasets were provided by NOAA to the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS) in Woods Hole, MA as part of a cooperative agreement to provide high resolution bathymetry and backscatter intensity maps and digital GIS information for resource management, scientific research, industry and the public.
20000919
20011030
ground condition
None planned
-71.066756
-70.806420
42.438013
42.253690
USGS Metadata Identifier
USGS:40f4730f-b22b-41c9-8c54-06e77365372a
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Science Center
WHSC
Massachusetts Office of Coastal Zone Management
CZM
Seafloor
Marine Geology
Sidescan
Sidescan Sonar
Edgetech
272-T
Klein
5500
National Oceanic and Atmospheric Administration
NOAA
National Ocean Service
NOS
NOAA Ship Whiting
Hydrographic Survey
GeoTIFF image
greyscale image
ISO 19115 Topic Category
oceans
imageryBaseMapsEarthCover
geoscientificinformation
USGS Thesaurus
sea-floor acoustic reflectivity
image mosaics
sidescan sonar
marine geophysics
geospatial datasets
None
Massachusetts Bay
Atlantic Ocean
Boston Harbor
Nahant
Boston
Hull
Hubline
Boston Harbor Islands
General
Seafloor
sea floor
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 (USGS), as the source of this information.
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
seth.ackerman@state.ma.us
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
These data have not been quantitatively compared to previous hydrographic data, although they generally agree with qualitative comparison of published NOAA charts.
Information unavailable from original metadata.
All of the NOAA survey vessels were equipped with Trimble DSM212L Differential Global Positioning System (DGPS) receivers. Launch 1005, which collected all of the multibeam bathymetry, was also equipped with a TSS POS/MV Model 320 (Position and Orientation System for Marine Vessels). Standard bathymetric processing, including tide corrections, soundings accuracy, and quality control were done by the NOAA Office of Coast Survey.
NOAA (assumed)
unknown
Information unavailable from original metadata.
External Hard Drive
20000919
20011030
ground condition
Information unavailable from original metadata.
The original geophysical data for this project were collected during four hydrographic surveys conducted by NOAA NOS in 2000 and 2001 on the NOAA Ship Whiting and its launches 1005/1014. Multibeam bathymetric data were acquired with a Reson SeaBat 8101 and sidescan sonar backscatter data were acquired with Edgetech model 272-T (100 kHz) or the Klein T-5500 (455 kHz) sonar systems.
Sidescan data were acquired by NOAA NOS with the Edgetech model 272-T (100 kHz) or the Klein T-5500 (455 kHz) sidescan sonar systems. Equipment was either hull mounted or towed. Range, layback, gain and other acquisition parameters varied and were adjusted accordingly in the acquisition software. Raw .xtf sonar files were transferred from NOAA NOS to the USGS/CZM.
unknown
The raw sidescan-sonar data were processed using XSonar/ShowImage software. The processing steps included demultiplexing the raw sidescan data using a median filtering routine to suppress speckle noise, a file check of navigation points to delete repeated fixes or other logging errors, correct for slant-range distortion, signal attenuation, and dropped sonar lines (Danforth, W.W., 1997, Xsonar/ShowImage: A complete system for rapid sidescan-sonar processing and display: U.S. Geological Survey Open File Report 97-686, 77 p.).
unknown
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
c/o U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
seth.ackerman@state.ma.us
PCI Geomatics is a commercially available software package used to digitally mosaic sidescan-sonar records. The geographically oriented raster imagery is imported as individual line files. Adjacent sidescan-sonar records are compared to establish ground control points at common target locations. This helps to correct for navigational errors and potential feature offset due to undefined layback of the tow vehicle. A stencil line is drawn around an individual swath record to crop and paste it on an adjacent swath. This procedure is repeated for each sidescan-sonar line swath to form a composite digital mosaic of the area.
unknown
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
c/o U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
seth.ackerman@state.ma.us
A linear stretch was applied in to the sidescan sonar image to make adjacent areas mapped with different sonar systems internally consistent. The processed data from a given system, in many cases, were constrained to a limited range of backscatter intensity values. Adjustments were made to the greyscale imagery to tone-match and keep each survey internally consistent. The process described above for mosaicking in PCI was then repeated of each area mapped by a specific system and the patchwork of sidescan sonar images were combined into a composite image for the entire study area.
unknown
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
c/o U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
seth.ackerman@state.ma.us
A linear contrast stretch was applied to the final image. The lightest and darkest pixel levels were clipped to the upper and lower limits of the image's histogram. This redistributed the remaining levels between 0-255. The redistribution increases the tonal range of the image, improving the visual contrast between areas that originally had small tonal differences.
unknown
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
c/o U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
seth.ackerman@state.ma.us
In ArcCatalog 9.0, Spatial Analyst -> Aggregate was use to desample the cell size of the GeoTIFF image. Input raster: bh_1mbs.tif, Output raster: bh_5mbs.tif, Cell Factor: 5, Aggregate technique: median.
unknown
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
c/o U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
seth.ackerman@state.ma.us
Edits to the metadata were made to fix any errors that MP v 2.9.36 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 source information was incomplete and had to be modified to meet the standard. An invalid link was removed from the distribution section. 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.
20170201
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
An error was fixed in one of the originator names.
20180129
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
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
Raster
Pixel
4000
4200
1
Universal Transverse Mercator
19
0.999600
-69.000000
0.000000
500000.000000
0.000000
row and column
5.000000
5.000000
meters
D_WGS_1984
WGS_1984
6378137.000000
298.257224
Band_1
Information unavailable from original metadata.
Information unavailable from original metadata.
ObjectID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
c/o U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
508-457-2310
seth.ackerman@state.ma.us
Downloadable Data
Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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.
TIFF
ArcGIS 9.0
GeoTIFF
no compression applied
5
https://pubs.usgs.gov/of/2006/1008/gis/datazipped/bh_5mbs.zip
https://pubs.usgs.gov/of/2006/1008/html/appendix1.html
DVD-ROM
UDF
None
This image is available as a GeoTIFF image with an accompanying world file. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image.
20240318
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
mailing and physical address
c/o U.S. Geological Survey
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
508-548-8700 x2315
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
None
None