GOM99LMCS.SHP - R/V GYRE cruise G1-99-GM (99002) multi channel seismic tracklines

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Hart, Patrick E.

Originator: Cross, VeeAnn

Publication_Date: 2005

Title:

GOM99LMCS.SHP - R/V GYRE cruise G1-99-GM (99002) multi channel seismic tracklines

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/1999/mcs/nav/gom99lmcs.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:

This GIS data layer represents the tracklines along which multichannel seismic data were collected during USGS cruise G1-99-GM aboard the R/V GYRE. Seismic data were collected in the Gulf of Mexico along 1,268 km of tracklines on the upper and middle continental slope offshore of Texas and Louisiana to study the distribution and acoustic nature of gas hydrates in this region.

Purpose:

This GIS overlay is a component of the U.S. Geological Survey, Woods Hole Science 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. 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).

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19990401

Ending_Date: 19990430

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -92.991030

East_Bounding_Coordinate: -91.428770

North_Bounding_Coordinate: 27.944010

South_Bounding_Coordinate: 27.367830

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: navigation

Theme_Keyword: multichannel

Theme_Keyword: hydrophone

Theme_Keyword: G1-99-GM

Theme_Keyword: polyline shapefile

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: field activity serial number 99002

Theme_Keyword: navigation trackline

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

Place_Keyword: offshore Texas

Place_Keyword: offshore Louisiana

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 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/seismic/1999/mcs/nav/gom99lmcs-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/1999/mcs/nav/gom99lmcs.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.

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

Geospatial_Data_Presentation_Form: vector digital data

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/>

Data_Quality_Information:

Logical_Consistency_Report:

No additional checks for topological consistency were performed on the data. No duplicate features are present.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Hart, P.E.

Originator: Cooper, A.K.

Originator: Twichell, D.

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>

Type_of_Source_Media: online

Source_Citation_Abbreviation: gm99nav.txt

Source_Contribution:

Text file containing the cruise navigation was recovered from this report.

Process_Step:

Process_Description:

copied ASCII navigation file from open-file report 02-368. The fields were tab delimited, and the format of the text file was as follows: line, cdp, latitude, longitude, utm15x, utm15y

Source_Used_Citation_Abbreviation: <http://geopubs.wr.usgs.gov/open-file/of02-368/gm99nav.txt>

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 address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

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 text file was reformatted in Arc/Info into an Arc polyline ungenerate format

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 address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: (508) 548-8700 x2251

Contact_Facsimile_Telephone: (508) 457-2310

Contact_Electronic_Mail_Address: vatnip@usgs.gov

Process_Step:

Process_Description:

The Arc polyline ungenerate format file was converted to a polyline shapefile

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 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: 508-458-2310

Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description:

In ArcView, the field, LINENUM (line number), was added to the attribute table, and the table was edited to add the appropriate line number to each record.

Source_Used_Citation_Abbreviation: gom99lmcs.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 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:

In ArcView, a second field was added titled IMAGE that contains the path to the image of the seismic profile collected along each of the tracklines. This field is used to hotlink the seismic images with the appropriate trackline.

Source_Used_Citation_Abbreviation: gom99lmcs.shp

Source_Produced_Citation_Abbreviation: gom99lmcs.shp

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 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: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Point_and_Vector_Object_Count: 69

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: gom99lmcs

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: USGS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 69

Attribute_Units_of_Measure: integer count

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: LINENUM

Attribute_Definition:

Line number identification: Number and character string identifying the survey line.

Attribute_Definition_Source: USGS

Attribute_Domain_Values:

Unrepresentable_Domain: Character string

Attribute:

Attribute_Label: IMAGE

Attribute_Definition:

Path and name of image of seismic profile that is linked to this track line.

Attribute_Definition_Source: USGS

Attribute_Domain_Values:

Unrepresentable_Domain:

Character string containing the relative path and name of the seismic image associated with this line.

Attribute:

Attribute_Label: LENGTH

Attribute_Definition: Length of survey line in meters

Attribute_Definition_Source: USGS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1516.865

Range_Domain_Maximum: 54821.870

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 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: SHP

Format_Version_Number: 3.3

Format_Specification: ESRI polyline shapefile

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 archive

Transfer_Size: 0.088

Digital_Transfer_Option:

Online_Option:

Access_Instructions: Data may be retrieved via any WWW browser.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://pubs.usgs.gov/of/2005/1071/data/seismic/1999/mcs/nav/gom99lmcs.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: 20060130

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: 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