SIS1000UN_GEOG.TIF - Unenhanced SIS-1000 sidescan sonar mosaic of a minibasin on the Louisiana upper continental slope - geographic, WGS84

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: David Twichell
Originator: VeeAnn Cross
Originator: William Danforth
Publication_Date: 2005
Title:
SIS1000UN_GEOG.TIF - Unenhanced SIS-1000 sidescan sonar mosaic of a minibasin on the Louisiana upper continental slope - geographic, WGS84
Edition: 1.0
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2005-1071
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/2005/1071/data/sidescan/imagery/sis1000/raw/geog/sis1000un_geog.zip>
Larger_Work_Citation:
Citation_Information:
Originator: Twichell D.C.
Originator: Cross V.A.
Originator: Paskevich, V.F.
Originator: Hutchinson, D.R.
Originator: Winters, W.J.
Originator: Hart, P.E.
Publication_Date: 2005
Title:
GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2005-1071
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/2005/1071>
Description:
Abstract:
Since 1982 the U.S. Geological Survey (USGS) has collected a large amount of surficial and shallow subsurface geologic information in the deep parts of the Gulf of Mexico. These data include digital sidescan sonar imagery, digital seismic-reflection data, and descriptions and analyses of piston and gravity cores. The data were collected during several different projects that addressed surficial and shallow subsurface geologic processes. Some of these data sets have already been published, but the growing interest in the occurrence and distribution of gas hydrates in the Gulf of Mexico warrants integrating these existing data and associated interpretations into a GIS to provide regional background information for ongoing and future gas hydrate research.
Purpose:
This GeoTIFF image is a 2 m version of a sidescan sonar mosaic collected using a Benthos SIS-1000 sidescan sonar system. The sonar mosaic has been enhanced and projected to geographic using the WGS 84 datum. This sidescan sonar mosaic was collected on the upper Louisiana continental slope in water depths less than 800 m, and covers an area of 329 km2. Results have been briefly summarized by Cooper et al. (1999).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19990410
Ending_Date: 19990414
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -91.868034
East_Bounding_Coordinate: -91.581657
North_Bounding_Coordinate: 27.833338
South_Bounding_Coordinate: 27.700012
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: Gulf of Mexico database
Theme_Keyword: Exclusive Economic Zone
Theme_Keyword: EEZ
Theme_Keyword: sidescan sonar
Theme_Keyword: sidescan sonar mosaic
Theme_Keyword: composite mosaic
Theme_Keyword: TIFF
Theme_Keyword: TIF
Theme_Keyword: GeoTIFF
Theme_Keyword: GEOTIFF
Theme_Keyword: SIS-1000
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Information Archives Field Activity 99002
Theme_Keyword: WHSC
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: Gulf of Mexico
Place_Keyword: Louisiana continental slope
Place_Keyword: North America
Place_Keyword: United States
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: David Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
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 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2005/1071/data/sidescan/imagery/sis1000/raw/geog/sis1000un_geog-thumb.gif>
Browse_Graphic_File_Description:
Thumbnail image of the SIS1000 sidescan sonar mosaic of a minibasin on the Louisiana upper continental slope.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2005/1071/data/sidescan/imagery/sis1000/raw/geog/sis1000un_geog.gif>
Browse_Graphic_File_Description:
Overview image of the SIS1000 sidescan sonar mosaic of a minibasin on the Louisiana upper continental slope.
Browse_Graphic_File_Type: GIF
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Cross_Reference:
Citation_Information:
Originator: Foster, D.F.
Originator: Twichell, D.C.
Originator: Danforth, W.W.
Originator: Irwin, B.J.
Originator: Nichols, D.R.
Originator: O'Brien, T.F.
Publication_Date: 2000
Title:
Archive of SIS-1000 CHIRP subbottom data collected during USGS cruise GYRE 99002 Gulf of Mexico, 9-22 April, 1999
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 99-586
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Cross_Reference:
Citation_Information:
Originator: Danforth, W.W.
Originator: O'Brien, T.F.
Originator: Schwab, W.W.
Title:
USGS image processing system: near real-time mosaicking of high-resolution sidescan-sonar data
Series_Information:
Series_Name: Sea Technology
Issue_Identification: January, 1991
Publication_Information:
Publisher: Marine Technology Society
Cross_Reference:
Citation_Information:
Originator: Paskevich, V.
Publication_Date: 1992
Title:
Digital mapping of side-scan sonar data with the Woods Hole Image Processing System software
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 92-536
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Cross_Reference:
Citation_Information:
Originator: Paskevich, V.
Title:
MAPIT: An improved method for mapping digital sidescan sonar data using the Woods Hole Image Processing System (WHIPS) software
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 96-281
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Cross_Reference:
Citation_Information:
Originator: Cooper, A
Originator: Twichell, D
Originator: Hart, P
Publication_Date: 1999
Title:
A seismic-reflection investigation of gas hydrates and sea-floor features of the upper continental slope of the Garden Banks and Green Canyon regions, northern Gulf of Mexico
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 99-570
Publication_Information:
Publication_Place: Reston, VA
Publisher: U S Geological Survey
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: There are no attributes associated with the image.
Logical_Consistency_Report:
All these data were collected using the USGS SIS-1000 sidescan sonar. The data were all collected using a 1500 m total swath width. At the end of the first line, however, it was realized that the system scanning approximately 600 m rather than 750 m to each side of the tow vehicle, and the survey track lines were adjusted to account for this shorter swath width.
Completeness_Report:
All sidescan data collected for the survey of this basin were included in the mosaic even though rough weather degraded the quality of part of the southernmost line.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The ship was navigated with differential GPS, and location of the deep-towed sidescan vehicle was calculated in a variety of ways. In shallow water an acoustic ranging system was used in concert with vehicle depth and ship heading to compute vehicle location. In deeper water depths where the acoustic ranging system did not work, vehicle location was calculated in one of two ways. In some places the amount of wire out was used in place of the acoustic range. In other places, vehicle location was calculated by measuring the offset between features observed on the NOAA multibeam bathymetry and the tow vehicle echo sounder. This offset was measured at several points along each track and was used to compute vehicle navigation. Vehicle location was interpolated between the measured points. Comparison of features on the surface-towed seismic data with the same features on the deep-towed seismic data indicates that the offset mostly is less than 100 m.
Lineage:
Process_Step:
Process_Description:
Sidescan sonar data were collected using a Benthos SIS-1000 sidescan sonar system and logged to a Triton/ELICS QMIPS data logging computer.
Source_Produced_Citation_Abbreviation: QMIPS data files
Process_Step:
Process_Description:
The digital sidescan data were copied from the logging computer and then processed and mapped to provide proper geographic locations of features identified in the imagery. The first step was to edit the navigation to generate the best tow-vehicle navigation possible. A full description of the navigation processing steps is given by Foster and others (2000). The next set of processing steps included subsampling the raw sidescan data using a median filtering routine to suppress speckle noise and reduce file size, merging these image files with the edited navigation and then correcting for slant-range distortion and signal attenuation using XSonar (Danforth and others, 1991). After these steps the data were imported to the WHIPS software (Paskevich, 1992) and high- and low-pass filtering routines were used to reduce the noise associated with dropped sonar lines. Once the processing of individual strips was completed the imagery was mapped to its proper geographic location using techniques summarized by Paskevich (1996). The data were mapped in UTM (zone 15) using the WGS 84 datum at a 2-m pixel size. The navigation processing was done by David Foster, the XSonar processing by William Danforth, and the WHIPS processing and mapping by VeeAnn Cross.
Source_Used_Citation_Abbreviation: QMIPS data files
Source_Produced_Citation_Abbreviation: WHIPS data files
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
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 x 2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
Non-overlapping swaths of sonar imagery were brought into the PCI remote sensing software and combined to create a composite digital mosaic. The techniques used to generate the composite digital sidescan mosaic are summarized by Paskevich (1992).
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Dave Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
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 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Process_Step:
Process_Description:
The unenhanced image mosaic was exported from the PCI 'pix' database as a GEOTIFF image with an associated ARC "world" file. The completed mosaic has a 2-m pixel size.
Source_Used_Citation_Abbreviation: area2.pix
Process_Date: 20040916
Source_Produced_Citation_Abbreviation: area2un.tif
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
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 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Process_Step:
Process_Description:
The unenhanced tif image was reprojected to a geographic projection using the WGS 84 datum. The Blue Marble Corp. Geographic Transformer (v. 5.1) software was used to complete this step.
Source_Used_Citation_Abbreviation: area2un.tif
Process_Date: 20040916
Source_Produced_Citation_Abbreviation: sis1000un_geog.tif
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
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 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 7387
Column_Count: 14040
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Geographic_Coordinate_Units: Decimal degrees
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: Red
Attribute:
Attribute_Label: Green
Attribute:
Attribute_Label: Blue
Overview_Description:
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
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 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
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_Specification: GeoTIFF
Format_Information_Content: A GeoTIFF image and associated world file.
File_Decompression_Technique: zip
Transfer_Size: 61.976
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://pubs.usgs.gov/of/2005/1071/data/sidescan/sis1000/raw/geog/sis1000un_geog.zip>
Access_Instructions: Data may be retrieved via any WWW browser.
Offline_Option:
Offline_Media: DVD-ROM
Recording_Capacity:
Recording_Density: 4.75
Recording_Density_Units: Gbytes
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: 20051213
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: David Twichell
Contact_Position: Oceanographer
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 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@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
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Tue Dec 13 11:34:56 2005