GOM98LINE.SHP - Tracklines of Multichannel Seismics Survey Collected During USGS Cruise M1-98-GM

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Hart, Patrick E.
Originator: Cooper, Alan K.
Originator: Twichell, David
Publication_Date: 2005
Title:
GOM98LINE.SHP - Tracklines of Multichannel Seismics Survey Collected During USGS Cruise M1-98-GM
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
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/seismic/1998/nav/gom98line.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:
Shapefile showing tracklines of Multichannel Seismics Survey Collected During USGS Cruise M1-98-GM. This cruise was to the Mississippi Canyon region of the Gulf of Mexico, and data were collected along 555 km of tracklines.

During June 1998 and April 1999, the U.S. Geological Survey (USGS) conducted two research cruises in the northern Gulf of Mexico to acquire high-resolution seismic reflection data across the upper and middle continental slope as part of an investigation of the seismic character, distribution, and potential effects of naturally-occurring marine gas hydrates and related free gas within the gas hydrate stability zone. Over 1600 km of two-dimensional multichannel seismic reflection profiles were acquired during these two cruises. The specific objectives of this investigation are (a) to produce high-resolution images of the gas hydrate stability zone; (b) to study the distribution and character of potential seafloor failures and their relationship to known and inferred gas hydrate deposits; (c) to look at systematic variations in subsurface structure in gas hydrate and non-hydrate areas; and (d) to estimate, if possible, the amounts of hydrates present within the gas hydrate stability zone. The multichannel profiles provide high-quality images with approximately 5 meters of vertical resolution and up to 2 km of penetration. This report gives an overview of the acquisition and data processing of the multichannel seismic reflection profiles and provides references and links to reports with more detailed information. Geologic interpretations of these seismic profiles regarding gas hydrate occurrence and distribution within the study areas of this investigation are given in Hart and others (2002).

Purpose:
This GIS overlay is a component of the U.S. Geological Survey, Woods Hole Field Center's, Gulf of Mexico GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19980601
Ending_Date: 19980630
Currentness_Reference: ground condition
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.941090
East_Bounding_Coordinate: -88.997710
North_Bounding_Coordinate: 28.657360
South_Bounding_Coordinate: 28.026890
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: multichannel
Theme_Keyword: hydrophone
Theme_Keyword: polyline shapefile
Theme_Keyword: navigation
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: Information Archives Field Activity M1-98-GM
Theme_Keyword: R/V TOMMY MUNRO
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans and estuaries
Theme_Keyword: location
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Gulf of Mexico
Place_Keyword: Continental Slope
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: Hart, Patrick
Contact_Organization: U.S. Geological Survey
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing address
Address: 345 Middlefield Road, MS 999
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: 650-329-5160
Contact_Facsimile_Telephone: 650-329-5190
Contact_Electronic_Mail_Address: hart@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2005/1071/data/seismic/1998/nav/gom98_line-thumb.gif>
Browse_Graphic_File_Description:
Thumbnail image showing the extent and coverage of the data layer.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2005/1071/data/seismic/1998/nav/gom98_line.gif>
Browse_Graphic_File_Description: Image showing the extent and coverage of the data layer.
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: Hart, P.E.
Originator: Cooper, A.K.
Originator: Twichell, D.C.
Originator: Lee, M.
Originator: Agena, W.
Publication_Date: 2002
Title:
High-resolution multichannel seismic-reflection data acquired in the northern Gulf of Mexico, 1998-99
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 02-368
Publication_Information:
Publication_Place: Western Coastal and Marine Geology, Menlo Park, CA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <http://geopubs.wr.usgs.gov/open-file/of02-368/>
Cross_Reference:
Citation_Information:
Originator: Alan Cooper
Originator: Patrick Hart
Originator: Ingo Pecher
Publication_Date: 1998
Title:
Cruise Report for a Seismic Investigation of Gas Hydrates in the Mississippi Canyon Region, Northern Gulf of Mexico - Cruise M1-98-GM
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 98-506
Publication_Information:
Publication_Place: Western Coastal and Marine Geology, Menlo Park, CA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <http://geopubs.wr.usgs.gov/open-file/of98-506/>

Data_Quality_Information:
Logical_Consistency_Report:
No additional checks for topological consistency were performed on this data set. No duplicate features are present.
Lineage:
Process_Step:
Process_Description:
The navigation text file gm98nav.txt was imported form USGS Open-File Report 02-368. This ASCII file was imported to Microsoft Excel and then exported as a comma delimited text file. ArcView 3.3 was uses to add the comma delimited text to the project as a table, and the table then was saved as a shapefile.
Source_Used_Citation_Abbreviation: <http://geopubs.wr.usgs.gov/open-file/of02-368/gm98nav.txt>
Source_Produced_Citation_Abbreviation: gom98shtallg.shp
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine 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 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The point shapefile (gom99shtallg.shp) was converted to a line file using an Avenue script "navpnts2line.ave" written by VeeAnn Cross.
Source_Used_Citation_Abbreviation: gom99shtallg.shp
Source_Produced_Citation_Abbreviation: gom99lmcs.shp
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine 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 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 41

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: gom98line
Entity_Type_Definition: Shapefile Attribute Table
Entity_Type_Definition_Source: ESRI
Attribute:
Attribute_Label: FID
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: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ID
Attribute_Definition: sequential numbers
Attribute_Definition_Source: user defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 41
Attribute_Units_of_Measure: integer
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: LINENUM
Attribute_Definition: Number associated with each seismic survey line
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Character string representing the survey line
Attribute:
Attribute_Label: IMAGE
Attribute_Definition:
Path to and name of image of seismic profile associated with each survey line.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain:
Character stringin containing the relative path and name of image of seismic profile that is linked to this track line.
Attribute:
Attribute_Label: LENGTH
Attribute_Definition: length of trackline in meters
Attribute_Definition_Source: Software Computed
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3282.795
Range_Domain_Maximum: 55944.282
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: .001

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 Rd.
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: SHP
Format_Version_Number: 3.3
Format_Specification: ESRI Shapefile Format
Format_Information_Content:
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
Transfer_Size: 0.060
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://pubs.usgs.gov/of/2005/1071/data/seismic/1998/nav/gom98line.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:
These 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 the importing data. A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com.

Metadata_Reference_Information:
Metadata_Date: 2005
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing 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
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: universal 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 Mon Jan 30 14:18:57 2006