Backscatter Imagery from Sidescan Sonar 5 meter/pixel of Boston Harbor and Approaches

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Seth Ackerman
Publication_Date: 2006
Title:
Backscatter Imagery from Sidescan Sonar 5 meter/pixel of Boston Harbor and Approaches
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1008
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <http://pubs.usgs.gov/of/2006/1008/gis/datazipped/bh_5mbs.zip>
Larger_Work_Citation:
Citation_Information:
Originator: Ackerman, S.D.
Originator: Butman, B.
Originator: Barnhardt, W.B.
Originator: Danforth, W.W.
Originator: Crocker, J.M.
Publication_Date: 2006
Title:
High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1008
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Other_Citation_Details: 1 DVD-ROM
Online_Linkage: <http://pubs.usgs.gov/of/2006/1008>
Description:
Abstract:
These data are high-resolution acoustic backscatter measurements of the seafloor from Boston Harbor and the harbor approaches, Massachusetts. Approximately 170 km² 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).
Purpose:
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.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20000919
Ending_Date: 20011030
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -71.066756
East_Bounding_Coordinate: -70.806420
North_Bounding_Coordinate: 42.438013
South_Bounding_Coordinate: 42.253690
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: WHSC
Theme_Keyword: Massachusetts Office of Coastal Zone Management
Theme_Keyword: CZM
Theme_Keyword: Seafloor
Theme_Keyword: Marine Geology
Theme_Keyword: Sidescan
Theme_Keyword: Sidescan Sonar
Theme_Keyword: Edgetech
Theme_Keyword: 272-T
Theme_Keyword: Klein
Theme_Keyword: 5500
Theme_Keyword: National Oceanic and Atmospheric Administration
Theme_Keyword: NOAA
Theme_Keyword: National Ocean Service
Theme_Keyword: NOS
Theme_Keyword: NOAA Ship Whiting
Theme_Keyword: Hydrographic Survey
Theme_Keyword: GeoTIFF image
Theme_Keyword: greyscale image
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans and estuaries
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: geoscientificinformation
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Massachusetts Bay
Place_Keyword: Atlantic Ocean
Place_Keyword: Boston Harbor
Place_Keyword: Nahant
Place_Keyword: Boston
Place_Keyword: Hull
Place_Keyword: Hubline
Place_Keyword: Boston Harbor Islands
Stratum:
Stratum_Keyword_Thesaurus: General
Stratum_Keyword: Seafloor
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 (USGS), as the source of this information.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722

Data_Quality_Information:
Logical_Consistency_Report:
These data have not been quantitatively compared to previous hydrographic data, although they generally agree with qualitative comparison of published NOAA charts.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
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.
Lineage:
Source_Information:
Type_of_Source_Media: External Hard Drive
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20000919
Ending_Date: 20011030
Source_Currentness_Reference: ground condition
Source_Contribution:
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.
Process_Step:
Process_Description:
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.
Process_Step:
Process_Description:
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.).
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: c/o U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Process_Step:
Process_Description:
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.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: c/o U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Process_Step:
Process_Description:
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.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: c/o U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Process_Step:
Process_Description:
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.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: c/o U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Process_Step:
Process_Description:
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.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: c/o U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: W:\czm\Morris\XML_metadata\moris_bh_5mbs_rd.xml
Process_Date: 20090813
Process_Time: 14343000

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 4000
Column_Count: 4200
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 19
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -69.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 5.000000
Ordinate_Resolution: 5.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Band_1
Attribute:
Attribute_Label: ObjectID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Value
Attribute:
Attribute_Label: Count

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: c/o U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Resource_Description: Downloadable Data
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF
Format_Version_Number: ArcGIS 9.0
Format_Specification: GeoTIFF
File_Decompression_Technique: no compression applied
Transfer_Size: 0.000
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://pubs.usgs.gov/of/2006/1008/gis/datazipped/bh_5mbs.zip>
Network_Resource_Name: <http://pubs.usgs.gov/of/2006/1008/html/appendix1.html>
Network_Resource_Name:
<http://pubs.usgs.gov/of/2006/1008/gis/OFR_2006_1008/images/backscatter/>
Offline_Option:
Offline_Media: DVD-ROM
Recording_Format: UDF
Fees: None
Technical_Prerequisites:
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.

Metadata_Reference_Information:
Metadata_Date: 20060807
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: Massachusetts Office of Coastal Zone Management
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: c/o U.S. Geological Survey
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None

Generated by mp version 2.9.6 on Thu Aug 13 15:21:36 2009