HIGHBACKSCATTER.SHP - Areas of high acoustic backscatter on the SIS-1000 1999 USGS sidescan sonar image of the Upper Continental Slope study area offshore of Louisiana
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: David Twichell
- Publication_Date: 2005
- Title:
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HIGHBACKSCATTER.SHP - Areas of high acoustic backscatter on the SIS-1000 1999 USGS sidescan sonar image of the Upper Continental Slope study area offshore of Louisiana
- Edition: 1.0
- Geospatial_Data_Presentation_Form: vector digital data
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: 2005-1071
- Publication_Information:
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- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Online_Linkage:
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<http://pubs.usgs.gov/of/2005/1071/data/sidescan/interpretation/sis1000/highbackscatter.zip>
- Larger_Work_Citation:
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- Citation_Information:
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- 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:
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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:
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- Series_Name: Open-File Report
- Issue_Identification: 2005-1071
- Publication_Information:
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- 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:
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- Abstract:
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This GIS is a component of the U.S. Geological Survey, Woods Hole Science Center's Gulf of Mexico GIS database for gas hydrates. This database is intended to organize and display sidescan sonar, seismic-reflection, and sediment sample information collected by the USGS as well as derivative interpretations that are relevant to ongoing hydrate studies in the Gulf of Mexico.
- Purpose:
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This GIS data layer outlines the distribution of areas of high backscatter on the SIS-1000 sidescan sonar image. High-backscatter areas were those areas on the unenhanced sidescan image that were dominated by values exceeding 55.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 19990412
- Beginning_Time: 0941
- Ending_Date: 19990414
- Ending_Time: 1544
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: None planned
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -91.795960
- East_Bounding_Coordinate: -91.584547
- North_Bounding_Coordinate: 27.821649
- South_Bounding_Coordinate: 27.714290
- Keywords:
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- Theme:
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- 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: Gulf of Mexico GIS database
- Theme_Keyword: polygon
- Theme_Keyword: ArcView
- Theme_Keyword: Shapefile
- Theme_Keyword: U.S. Exclusive Economic Zone
- Theme_Keyword: EEZ
- Theme_Keyword: SIS-1000 sidescan sonar
- Theme_Keyword: sidescan sonar
- Theme_Keyword: sidescan sonar mosaic
- Theme_Keyword: geology
- Theme_Keyword: interpretation
- Theme_Keyword: Information Archives Field Activity 99002
- Theme_Keyword: high backscatter interpretation
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: geoscientificInformation
- Place:
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- Place_Keyword_Thesaurus: General
- Place_Keyword: Louisiana Continental Slope
- Place_Keyword: Gulf of Mexico
- Place_Keyword: North America
- Place_Keyword: United States
- Access_Constraints: None
- Use_Constraints:
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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:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: David Twichell
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Oceanographer
- Contact_Address:
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- 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:
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- Browse_Graphic_File_Name:
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<http://pubs.usgs.gov/of/2005/1071/data/sidescan/interpretation/sis1000/highbackscatter-thumb.gif>
- Browse_Graphic_File_Description:
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Thumbnail image showing the extent and content of the data layer.
- Browse_Graphic_File_Type: GIF
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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<http://pubs.usgs.gov/of/2005/1071/data/sidescan/interpretation/sis1000/highbackscatter.gif>
- Browse_Graphic_File_Description:
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Overview image showing the extent and content of the data layer.
- Browse_Graphic_File_Type: GIF
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
- Data_Quality_Information:
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- Logical_Consistency_Report: The data layer has been checked for topological consistency.
- Lineage:
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- Process_Step:
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- Process_Description:
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The unenhanced version of the SIS-1000 sidescan sonar image was viewed in ArcView, and an interpretation was completed in which areas of the sidescan mosaic with a pixel (dn) values exceeding 55 are present.
- Source_Used_Citation_Abbreviation: sis1000un_geog.tif
- Source_Produced_Citation_Abbreviation: highbackscatter.shp
- Process_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- 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:
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- Direct_Spatial_Reference_Method: Vector
- Point_and_Vector_Object_Information:
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- SDTS_Terms_Description:
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- SDTS_Point_and_Vector_Object_Type: G-polygon
- Point_and_Vector_Object_Count: 68
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Geographic:
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- Latitude_Resolution: 0.000000
- Longitude_Resolution: 0.000000
- Geographic_Coordinate_Units: Decimal degrees
- Geodetic_Model:
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- Horizontal_Datum_Name: North American Datum of 1983
- Ellipsoid_Name: Geodetic Reference System 80
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257224
- Entity_and_Attribute_Information:
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- Detailed_Description:
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- Entity_Type:
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- Entity_Type_Label: highbackscatter
- Entity_Type_Definition: Shapefile Attribute Table
- Entity_Type_Definition_Source: ESRI
- Attribute:
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- Attribute_Label: FID
- Attribute_Definition: Internal feature number.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain:
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Sequential unique whole numbers that are automatically generated.
- Attribute:
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- Attribute_Label: Shape
- Attribute_Definition: Feature geometry.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain: Coordinates defining the features.
- Attribute:
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- Attribute_Label: ID
- Attribute_Definition: Internal feature number
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Range_Domain:
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- Range_Domain_Minimum: 0
- Range_Domain_Maximum: 0
- Attribute_Units_of_Measure: integer count
- Attribute_Measurement_Resolution: 1
- Distribution_Information:
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- Distributor:
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- Contact_Information:
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- 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:
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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:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: SHP
- Format_Version_Number: 3.3
- Format_Specification: ESRI polygon shapefile
- Format_Information_Content:
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The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml. An ASCII version of the metadata file. A browse graphic showing the data layer coverage and extent (optional).
- File_Decompression_Technique: zip archive
- Transfer_Size: 0.022
- Digital_Transfer_Option:
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- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name:
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<http://pubs.usgs.gov/of/2005/1071/data/sidescan/interpretation/sis-1000/highbackscatter.zip>
- Access_Instructions: Data may be retrieved via any WWW browser.
- Offline_Option:
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- Offline_Media: DVD-ROM
- Recording_Capacity:
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- Recording_Density: 4.75
- Recording_Density_Units: Gbytes
- Recording_Format: UDF
- Fees: None
- Technical_Prerequisites:
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The data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS® or ArcView® 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com.
- Metadata_Reference_Information:
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- Metadata_Date: 20051219
- Metadata_Contact:
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- Contact_Information:
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- Contact_Organization_Primary:
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- 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:
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- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Mon Dec 19 11:31:30 2005