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U.S. Geological Survey Open-File Report 2004-1003 

BROWSE THUMBNAIL IMAGE: Image showing extent and distribution of data layer coverage.

H11043_UTM18_WGS84.TIF: Composite sidescan sonar mosaic in UTM zone 18 projection of NOAA survey H11043 off Branford, Connecticut

 

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Originator: National Oceanic and Atmospheric Administration
Publication_Date: 2003
Title:
H11043_UTM18_WGS84.TIF: Composite sidescan sonar mosaic in UTM zone 18 projection of NOAA survey H11043 off Branford, Connecticut
Edition: 1.0
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Other_Citation_Details: Data are released via CD-ROM media.
Online_Linkage:
<http://pubs.usgs.gov/of/2004/1003/data/sidescan/noaa_orig/h11043_utm18_wgs84.zip>
Larger_Work_Citation:
Citation_Information:
Originator: L.J. Poppe
Originator: V.F. Paskevich
Originator: M.S. Moser
Originator: M.L. DiGiacomo-Cohen
Originator: E.B. Christman
Publication_Date: 2004
Title:
Sidescan Sonar Imagery and Surficial Geologic Interpretation of the Sea Floor off Branford, Connecticut
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2004-1003
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Other_Citation_Details:
This digital publication may also be available via the web at pubs.usgs.gov
Online_Linkage: <http://pubs.usgs.gov/of/2004/1003>
Online_Linkage: <http://woodshole.er.usgs.gov/openfile/of2004-1003>
Description:
Abstract:
The U.S. Geological Survey, in cooperation with the National Oceanic and Atmospheric Administration and the Connecticut Department of Environmental Protection, has produced detailed geologic maps of the sea floor in Long Island Sound, a major East Coast estuary surrounded by the most densely populated region of the United States. These studies have built upon cooperative research with the State of Connecticut that was initiated in 1982. The current phase of this research program is directed toward studies of sea-floor sediment distribution, processes that control sediment distribution, nearshore environmental concerns, and the relation of benthic community structures to the sea-floor geology.

Anthropogenic wastes, toxic chemicals, and changes in land-use patterns resulting from residential, commercial, and recreational development have stressed the environment of the Sound, causing degradation and potential loss of benthic habitats (Koppelman and others, 1976; Long Island Sound Study, 1994). Detailed maps of the sea floor are needed to help evaluate the extent of adverse impacts and to help manage resources wisely in the future. Therefore, in a continuing effort to better understand Long Island Sound, we have constructed and interpreted sidescan sonar mosaics (complete-coverage acoustic images of the sea floor) within specific areas of special interest. The mosaic presented herein covers a 41.1 km square area of the sea floor in north-central Long Island Sound off Branford, Connecticut.

The mosaics and their interpretations serve many purposes, including: (1) defining the geological variability of the sea floor, which is one of the primary controls of benthic habitat diversity; (2) improving our understanding of the processes that control the distribution and transport of bottom sediments and the distribution of benthic habitats and associated infaunal community structures; and (3) providing a detailed framework for future research, monitoring, and management activities. The sidescan sonar mosaics also serve as base maps for subsequent sedimentological, geochemical, and biological observations, because precise information on environmental setting is important for selection of sampling sites and for accurate interpretation of point measurements.

Purpose:
This GIS overlay is a component of the Branford Survey, Long Island Sound, ArcView GIS database and contains the completed sidescan sonar mosaic for the study area. The image is projected in UTM and has not been enhanced. Light tones represent relatively harder returns, higher backscatter, and generally coarser sediments. Dark tones represent relatively softer returns, lower backscatter, and generally finer grained sediments.
Supplemental_Information:
The image includes a white background (no data) surrounding the sidescan sonar image. High dn values represent low backscatter and low dn values represent high backscatter.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2001
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.869907
East_Bounding_Coordinate: -72.775833
North_Bounding_Coordinate: 41.237200
South_Bounding_Coordinate: 41.151200
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: National Oceanic and Atmospheric Administration
Theme_Keyword: NOAA
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: NOAA Ship RUDE
Theme_Keyword: geotiff
Theme_Keyword: ArcView
Theme_Keyword: sidescan sonar mosaic
Theme_Keyword: image
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Atlantic Ocean
Place_Keyword: North Atlantic Ocean
Place_Keyword: northeast United States
Place_Keyword: Long Island Sound
Place_Keyword: Connecticut
Place_Keyword: U.S. East Coast
Place_Keyword: Townshend Ledge
Place_Keyword: Branford Reef
Access_Constraints: None
Use_Constraints:
Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the National Oceanic and Atmospheric Administration as the originator of this dataset.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Lawrence J. Poppe
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: h11043_utm18_wgs84
Browse_Graphic_File_Description:
Overview of the digital sidescan sonar mosaic for NOAA survey H11043 in UTM projection.
Browse_Graphic_File_Type: GIF
Data_Set_Credit:
The National Oceanic and Atmospheric Administration (NOAA) must be acknowledged as the originator of this data set.
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: There are no attributes associated with a GEOTIFF image.
Completeness_Report:
All collected data were processed and used to generate the digital mosaic.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Navigation was by differential GPS; positional accuracy to less than 10 m.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: National Oceanic and Atmospheric Administration
Publication_Date: Unpublished Material
Title: H11043mosaic
Edition: 1.0
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Publication_Information:
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2001
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: H11043mosaic.tif
Source_Contribution:
Original sidescan sonar mosaic created by National Oceanic and Atmospheric Administration (NOAA). This image is projected in UTM to maintain the aspect ratio.
Process_Step:
Process_Description:
The sidescan sonar imagery contained in this report was produced from data collected during 2001 as part of NOAA surveys H11043 and H11044 aboard the NOAA Ship RUDE. The data for these surveys were acquired in XTF (extended Triton data format) using an Edgetech (EG&G) 272T sidescan sonar tow fish set to sweep about 100 m to either side of the ship's track. The Edgetech model 272T tow fish emits two 50°-wide beams tilted down 20° from horizontal, and transmits at 100 kHz. Analog side scan sonar data were converted to digital using an EG&G Analog Converter Interface (ACI). These digital data were then recorded through a Triton Elics International ISIS data acquisition system.

The sidescan sonar data were multiplexed and filtered to convert the data into the desired processing format and to remove speckle noise. Data were then corrected for slant-range distortions, and imported into SonarWeb, an application that creates mosaics from raw XTF sidescan sonar data. The mosaic include the following standards: 1 meter resolution, image 'shine through', and auto contrast adjustment (with a 12.9% contrast increase). The final image was projected in Universal Transverse Mercator to maintain the aspect ratio. A contrast enhancement based on the dynamic range of the data was applied to improve the final image.

The image includes a white background (no data) surrounding the sidescan sonar image. High dn values represent low backscatter and low dn values represent high backscatter.

Source_Used_Citation_Abbreviation: XTF sidescan sonar data
Process_Date: 2002
Source_Produced_Citation_Abbreviation: h11043mosaic.tif
Source_Produced_Citation_Abbreviation: h11043mosaic.tfw
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: LTJG Marc Moser
Contact_Organization: National Oceanic and Atmospheric Administration
Contact_Position: Field Support Liaison
Contact_Address:
Address_Type: mailing and physical address
Address: Hydrographic Systems and Technology Program
City: Norfolk
State_or_Province: VA
Postal_Code: 23510
Country: USA
Contact_Voice_Telephone: (757) 441-6726
Contact_Electronic_Mail_Address: Marc.S.Moser@noaa.gov
Process_Step:
Process_Description:
The original image was renamed to h11043_utm18_wgs84 for archival purposes and to be more descriptive.
Source_Used_Citation_Abbreviation: h11043mosaic.tif
Source_Used_Citation_Abbreviation: h11043mosaic.tfw
Process_Date: Unknown
Source_Produced_Citation_Abbreviation: h11043_utm18_wgs84.tif
Source_Produced_Citation_Abbreviation: h11043_utm18_wgs84.tfw
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Lawrence J. Poppe
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 9524
Column_Count: 8076
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: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
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: .000010
Ordinate_Resolution: .000010
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
Entity_Type_Definition: 8 bit digital image
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: Red
Attribute:
Attribute_Label: Green
Attribute:
Attribute_Label: Blue
Overview_Description:
Entity_and_Attribute_Overview:
Sidescan sonar image is in 8-bit digital data range with a white background (no data) surrounding the mosaic area. High dn values represent low backscatter and low dn values represent high backscatter.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Larry Poppe
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov
Resource_Description:
Downloadable Data: sidescan sonar mosaic of NOAA survey H11043 off Branford, CT - h11043_utm18_wgs84.tif
Distribution_Liability:
Although this data set has been used by the USGS and NOAA, no warranty, expressed or implied, is made by the USGS or NOAA 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 or NOAA in the use of these data or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF
Format_Information_Content:
Four files: h11043_utm18_wgs84.tif, h11043_utm18_wgs84.tfw, browse graphic and metadata file
File_Decompression_Technique: no compression applied
Transfer_Size: 75.152 Kb
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: Mbytes
Recording_Format: ISO 9660
Compatibility_Information:
The user must have a CD-ROM capable of reading an ISO 9660 standard CD-ROM
Fees: None
Technical_Prerequisites:
The user must have a program capable of reading and processing "geotiff" images.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004

Metadata_Reference_Information:
Metadata_Date: 20040404
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Lawrence J. Poppe
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov
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 2.7.33 on Sun Apr 04 14:25:14 2004