Geophysical Surveys of Bear Lake, Utah-Idaho, September 2002 - Sidescan-sonar Tracklines

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Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Jane F. Denny
Publication_Date: 2003
Title:
Geophysical Surveys of Bear Lake, Utah-Idaho, September 2002 - Sidescan-sonar Tracklines
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followed an earlier subbottom acoustic-reflection survey (1997), using boomer and 3.5 kHz systems (S. M. Colman, unpublished data).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 sidescan-sonar trackline navigation data during geophysical survey in Bear Lake, Utah-Idaho.
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: -111.17
North_Bounding_Coordinate: 42.2
South_Bounding_Coordinate: 41.08
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Sidescan-Sonar
Theme_Keyword: Edgetech
Theme_Keyword: CW System
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 sidescan-sonar 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 WAAS data were recorded in the header of the sidescan-sonar raw data. The sidescan-sonar tow-vehicle was towed close to the surface at a static height, adjacent to the vessel. WAAS locations were assumed for the sidescan-sonar tow-vehicle. The sidescan-soanr tow-vehicle was assumed to be navigated to an accuracy of +/- 5 meters.
Lineage:
Process_Step:
Process_Description:
The sidescan-sonar navigation is received by the Wide Area Augmentation System (WAAS) GPS network, sent directly to the sidescan-sonar acquisition system from the Coastal Oceanographics, Inc. Hypack navigation system, and recorded in the QMIPS header of each file. The navigation is later extracted from the header, and formatted into a comma-delimited ArcView Ungenerate text format. The file is then imported into ArcView, and a vector line shapefile is generated. The line numbers for each trackline are stored in an ASCII file listing unique track ID and line number. This file is imported into ArcView 3.2 as a table. The file is then joined to the line shapefile by the unique track ID. The table for the trackline file is the editted, a new field created, the line number information written to this new field, the join removed, and the file saved. This permantely saves the line number with the corresponding trackline.
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: Complete chain
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
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Sidescan-Sonar System: Trackline
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: Length
Attribute_Definition: ArcView 3.2 internal ID
Attribute_Definition_Source: ESRI ArcView 3.2
Attribute_Domain_Values:
Unrepresentable_Domain: ArcView 3.2
Attribute:
Attribute_Label: ID
Attribute_Definition: ArcView 3.2 internal ID
Attribute_Definition_Source: ArcView 3.2
Attribute_Domain_Values:
Unrepresentable_Domain: ArcView 3.2
Attribute:
Attribute_Label: Line
Attribute_Definition: Line Number
Attribute_Definition_Source: SEG-Y header
Attribute_Domain_Values:
Unrepresentable_Domain: Line Number
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
Generated by mp version 2.7.17 on Wed Jul 02 14:22:39 2003