Identification_Information: Citation: Citation_Information: Originator: David S. Foster Originator: VeeAnn A. Cross Publication_Date: 2005 Title: Chirp Seismic Survey Tracklines - Lake Mohave 2002 Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://pubs.usgs.gov/of/2004/1247/data/nav/seislines.zip Larger_Work_Citation: Citation_Information: Originator: VeeAnn A. Cross Originator: David S. Foster Originator: David C. Twichell Publication_Date: 2005 Title: Lake Mohave Geophysical Survey 2002: GIS Data Release Series_Information: Series_Name: Open-File Report Issue_Identification: 2004-1247 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2004/1247 Description: Abstract: Lake Mohave is one of several multi-purpose reservoirs that have been constructed on the Colorado River. The lake was formed upon completion of the Davis Dam in 1953. No mapping of the floor of the lake had been conducted since completion of the Davis Dam. The U.S. Geological Survey, in cooperation with researchers from the University of Nevada Las Vegas, completed a geophysical survey of this lake in April 2002. The survey included collection of sidescan sonar imagery of nearly the entire lake floor, and high-resolution seismic-reflection profiles along widely spaced lines throughout the lake. The detailed mapping of the lake floor was used to determine the amount of sediment that had accumulated in the lake since impoundment, its distribution, and the processes of deposition. Purpose: This shapefile is used to enable correlation between the seismic-reflection profiles and the sidescan-sonar imagery, geologic interpretation, and other features represented on the lake floor. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20020418 Ending_Date: 20020428 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -114.711633 East_Bounding_Coordinate: -114.570683 North_Bounding_Coordinate: 35.868300 South_Bounding_Coordinate: 35.200633 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: chirp Theme_Keyword: CMGP Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: Knudsen Theme_Keyword: lake Theme_Keyword: navigation Theme_Keyword: OF 2004-1247 Theme_Keyword: Open-File Report Theme_Keyword: polyline Theme_Keyword: reservoir Theme_Keyword: seismic Theme_Keyword: seismic-reflection Theme_Keyword: shapefile Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Science Center Theme_Keyword: field activity identifier H-1-02-SW Theme_Keyword: field activity serial number 02020 Place: Place_Keyword_Thesaurus: General Place_Keyword: Arizona Place_Keyword: Colorado River Place_Keyword: Davis Dam Place_Keyword: Hoover Dam Place_Keyword: Lake Mohave Place_Keyword: Las Vegas Place_Keyword: Mojave Desert Place_Keyword: Nelson's Landing Place_Keyword: Nevada 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 products or research derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David S. Foster Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2271 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dfoster@usgs.gov Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700 Data_Quality_Information: Positional_Accuracy: Horizontal_Positional_Accuracy: Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 10 m Horizontal_Positional_Accuracy_Explanation: Navigation data were collected with a PLGR system. The nominal accuracy of the system is thought to be 10m. Since the Knudsen system is a sidemount rather than towed system, this accuracy is not diminished. Lineage: Process_Step: Process_Description: This particular navigation was recorded with a Knudsen chirp subbottom system. The Knudsen system stores the navigation in a file separate from the SEG-Y data. This file was reformatted using SED and AWK scripts to create a comma delimited file appropriate to be added to ArcView 3.2a as an event theme. Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. 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: This event theme was then converted to a polyline shapefile using an Avenue script that converts points to lines based on a unique line identifier within the attribute table. Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. 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 attributes of JDAY and range (referring to the seismic range of the system) were added to the attribute table. 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: 57 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.0001 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: seislines 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 number for each separate polyline. Attribute_Definition_Source: Software generated. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 56 Attribute: Attribute_Label: LINENAME Attribute_Definition: Number refering the the line number of data acquisition. Attribute_Definition_Source: Software generated. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 60 Attribute: Attribute_Label: HOTLINK Attribute_Definition: String field indicating the location of the images to hotlink to each line. Has a variable for the initial part of the path. Attribute_Definition_Source: User defined. Attribute_Domain_Values: Unrepresentable_Domain: character set. Attribute: Attribute_Label: RANGE Attribute_Definition: The Knudsen setting determining the fire rate of the seismic system. Recorded as a range in meters instead of time. Attribute_Definition_Source: Software defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 50 Range_Domain_Maximum: 100 Attribute_Units_of_Measure: meters Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: David S. Foster Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2271 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dfoster@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: These data were 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 for the accuracy, completeness, or usefulness of any 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 in this publication 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. Metadata_Reference_Information: Metadata_Date: 20040629 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. 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 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile