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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_GEO_WGS84_ENHAN.TIF: Enhanced composite sidescan sonar mosaic 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_GEO_WGS84_ENHAN.TIF: Enhanced composite sidescan sonar mosaic 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/h11043/enhanced/h11043_geo_wgs84_enhan.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, which has been stretched to bring out details and facilitate interpretation, has a white background surrounding the composite mosaic.
Supplemental_Information:
This image has been radiometrically processed to enhance the image for better viewing. High dn values represent high backscatter and low dn values represent low 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
Theme_Keyword: geographic
Theme_Keyword: radiometrically enhanced
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 U.S. Geological Survey (USGS) and the National Oceanic and Atmospheric Administration as the originators of this dataset.
Point_of_Contact:
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
Browse_Graphic:
Browse_Graphic_File_Name: h11043_geo_wgs84_enhan
Browse_Graphic_File_Description:
Overview of the digital sidescan sonar mosaic produced for NOAA survey H11043
Browse_Graphic_File_Type: GIF
Data_Set_Credit:
The U.S. Geological Survey (USGS) and National Oceanic and Atmospheric Administration (NOAA) must be acknowledged as the originators 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: h11043_utm18_wgs84.tif
Edition: 1.0
Geospatial_Data_Presentation_Form: remote-sensing image
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).
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 and 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 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
Process_Step:
Process_Description:
The original image was projected from UTM zone 18 to geographic and greyscale inverted. Lower digital values (dark) represent low backscatter and higher digital values represent high backscatter.
Source_Used_Citation_Abbreviation: h11043_utm18_wgs84.tif
Source_Used_Citation_Abbreviation: h11043_utm18_wgs84.tfw
Process_Date: 20030926
Source_Produced_Citation_Abbreviation: h11043_geo_wgs84.tif
Source_Produced_Citation_Abbreviation: h11043_geo_wgs84.tfw
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Valerie Paskevich
Contact_Organization: U.S. Geological Survey
Contact_Position: Information Specialist, GIS Coordinator
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 x2281
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vpaskevich@usgs.gov
Process_Step:
Process_Description:
A linear contrast stretch was applied to the image to brighten and enhance the image for better viewing and visual interpretation. The final image was saved in GEOTIFF format.
Source_Used_Citation_Abbreviation: h11043_geo_wgs84.tif
Source_Used_Citation_Abbreviation: h11043_geo_wgs84.tfw
Process_Date: 20030926
Source_Produced_Citation_Abbreviation: h11043_geo_wgs84_enhan.tif
Source_Produced_Citation_Abbreviation: h11043_geo_wgs84_enhan.tfw
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Valerie Paskevich
Contact_Organization: U.S. Geological Survey
Contact_Position: Information Specialist, GIS Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Holr
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2281
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vpaskevich@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:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Planar:
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 0.000012
Ordinate_Resolution: 0.000009
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:
Overview_Description:

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: h11043_geo.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: Two files: h11043_geo.tif and h11043_geo.tfw
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 14:54:00 2004