Geophysical Surveys of Bear Lake, Utah-Idaho, September 2002 - Seismic Navigation: Start of Line

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: Jane F. Denny

Publication_Date: 2002

Title:

Geophysical Surveys of Bear Lake, Utah-Idaho, September 2002 - Seismic Navigation: Start of Line

Geospatial_Data_Presentation_Form: digital vector data

Publication_Information:

Publication_Place: Woods Hole, MA

Publisher: U.S. Geological Survey

Description:

Abstract:

Bear Lake is a tectonic lake that has existed for at least several hundred thousand years. The lake basin is a relatively simple half graben, a spoon-shaped depression tilted toward the main fault on the east side of the lake. The U.S. Geological Survey, in cooperation with researchers from several universities, has been studying the sediments of Bear Lake since 1996. The general purpose of this effort is to reconstruct past limnological conditions and regional climate on a range of timescales, from hundreds of years to hundreds of thousands of years. This research relates to a variety of human concerns, including water usage in the Bear River basin. Past work has included several coring operations, a seismic-reflection survey, sediment-trap deployments, a barge-mounted drilling operation with the GLAD800 drill rig, and a variety of other studies. The objectives of the September, 2002 operations, preliminarily reported here, were (1) to compile a detailed bathymetric map of the lake using swath-mapping techniques, in order to provide baseline data for a variety of applications and studies, and (2) to complete a sidescan-sonar survey of the lake, providing a nearly complete acoustic image of the lake floor. Limited amounts of subbottom acoustic-reflection data (chirp) were also collected, along with samples of lake-floor sediments representative of different kinds of backscatter patterns. These surveys followed an earlier subbottom acoustic-reflection survey (1997), using boomer and 3.5 kHz systems (S. M. Colman, unpublished data).

Purpose:

These data represent the first shot point for each line of data acquired with various seismic-reflection systems utilized during U.S. Geological Survey geophysical research cruises.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20020904

Ending_Date: 20020916

Currentness_Reference: Publication Date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -111.5

East_Bounding_Coordinate: -111.2

North_Bounding_Coordinate: 42.2

South_Bounding_Coordinate: 41.08

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: seismic reflection

Theme_Keyword: SEG-Y

Theme_Keyword: Chirp

Theme_Keyword: shot point

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 Field Center

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Bear Lake

Place_Keyword: Utah

Place_Keyword: Idaho

Place_Keyword: North America

Place_Keyword: United States

Access_Constraints: None

Use_Constraints:

The U.S. Geological Survey must be referenced as the originator of the dataset in any future publications.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

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

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Native_Data_Set_Environment: ArcView version 3.2 shapefile format

Data_Quality_Information:

Logical_Consistency_Report:

These navigation data have been stripped from the header of seismic SEG-Y data. They have been quality checked by comparing these data to navigation data acquired during cruise operations.

Completeness_Report: Complete

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

WAAS (Wide Area Augmentation System) Navigation was used to acquire navigation information. WAAS is considered to have a horizontal accuracy of < 3 meters. The chirp tow-vehicle was towed at the surface, next to the vessel. WAAS positioning was recorded in the SEGY header of the seismic data. Navigation of the seismic tow-vehicle is assumed to be +/- 3 meters.

Lineage:

Process_Step:

Process_Description:

The seismic shot navigation is received by the differential GPS system (WAAS), sent directly to the seismic acquisition system, and recorded in the SEG-Y header of each file. The navigation is later extracted from the SEG-Y header, the first shot point is extracted, converted from its native UTM projection (zone 12, units meters, WGS84 datum) to Geographic Coordinate System, and formatted into a comma-delimited ASCII file. This file is imported into ArcView 3.2 as a table. The table is then converted into a point shapefile.

Process_Date: 2003

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

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

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@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: point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000089992

Longitude_Resolution: 0.000089992

Geographic_Coordinate_Units: decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS84

Ellipsoid_Name: WGS84

Semi-major_Axis: 6378137.0000000

Denominator_of_Flattening_Ratio: 298.26

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: Assumed sea level

Altitude_Resolution: 1

Altitude_Distance_Units: Two-way travel time

Altitude_Encoding_Method: Attribute values

Depth_System_Definition:

Depth_Datum_Name: Local surface

Depth_Resolution: 1

Depth_Distance_Units: Meters

Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Seismic Shot Point Navigation

Entity_Type_Definition: Shapefile Attribute Table

Entity_Type_Definition_Source: ArcView 3.2

Attribute:

Attribute_Label: Shape

Attribute_Definition: internal ArcView 3.2 ID

Attribute_Definition_Source: ArcView 3.2

Attribute_Domain_Values:

Unrepresentable_Domain: ArcView 3.2

Attribute:

Attribute_Label: Lon

Attribute_Definition: X coordinate in Geographic Coordinate System

Attribute_Definition_Source: Geographic Coordinate System

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -111.5

Range_Domain_Maximum: -111.17

Attribute:

Attribute_Label: Lat

Attribute_Definition: y-Coordinate in Geographic Coordinate System

Attribute_Definition_Source: Geographic Coordinate System

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 41.08

Range_Domain_Maximum: 42.2

Attribute:

Attribute_Label: Line

Attribute_Definition: Line Number

Attribute_Definition_Source: data set

Attribute_Domain_Values:

Unrepresentable_Domain: Line Number

Attribute:

Attribute_Label: Shot

Attribute_Definition: Shot Point Number

Attribute_Definition_Source: data set

Attribute_Domain_Values:

Unrepresentable_Domain: Shot Point Number

Attribute:

Attribute_Label: UTMX

Attribute_Definition: X Coordinate; UTM, Zone 12

Attribute_Definition_Source: data set

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 450000

Range_Domain_Maximum: 480000

Attribute:

Attribute_Label: UTMY

Attribute_Definition: Y-Coordinate; UTM, Zone 12

Attribute_Definition_Source: data set

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4500000

Range_Domain_Maximum: 4700000

Attribute:

Attribute_Label: Year

Attribute_Definition: Calendar Date

Attribute_Definition_Source: Calendar

Attribute_Domain_Values:

Unrepresentable_Domain: Calendar Date

Attribute:

Attribute_Label: JD_HR_MIN_

Attribute_Definition: Time - Julian Day, Hour, Minute, Second

Attribute_Definition_Source: Calendar Date

Attribute_Domain_Values:

Unrepresentable_Domain: Calendar Date

Distribution_Information:

Distribution_Liability:

This publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

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

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Metadata_Reference_Information:

Metadata_Date: 20020119

Metadata_Review_Date: 2002

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

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

Country: USA

Contact_Voice_Telephone: 508-457-2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None