Identification_Information: Citation: Citation_Information: Originator: United States Geological Survey (USGS), Coastal and Marine Geology (CMG), Chief Scientist (Peter Dartnell) Publication_Date: 2004 Title: Multibeam Bathymetry of the Short Bank Region, Santa Monica Bay, California Geospatial_Data_Presentation_Form: XYZ ASCII Description: Abstract: XYZ ASCII format data generated from the 1996 multibeam sonar surveys of Santa Monica Bay, California. The data include high-resolution bathymetry. Purpose: These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) or other software to display bathymetry data of the Short Bank Region, Santa Monica Bay, California. Supplemental_Information: Information for USGS Coastal and Marine Geology related activities are online at < http://walrus.wr.usgs.gov/infobank/c/c196sc/html/c-1-96-sc.meta.html> < http://geopubs.wr.usgs.gov/open-file/of02-162/ > Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19960930 Ending_Date: 19961029 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -118.65038847 East_Bounding_Coordinate: -118.48874155 North_Bounding_Coordinate: 33.94368538 South_Bounding_Coordinate: 33.82901158 Keywords: Theme: Theme_Keyword_Thesaurus: GCMD DIF, Version 5.0a, September 1996: Parameter Keywords Theme_Keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry Theme_Keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Marine Geology Theme_Keyword: Multibeam Theme_Keyword: Bathymetry Theme_Keyword: Water Depth Theme_Keyword: Seafloor Topography Place: Place_Keyword_Thesaurus: Geographic Names Information System, USGS, Reston, VA Place_Keyword: Santa Monica Bay Place_Keyword_Thesaurus: None Place_Keyword: CA Place_Keyword: Southern California Place_Keyword: USA Access_Constraints:None Use_Constraints: Please recognize the U.S. Geological Survey (USGS) as the source of this information. USGS-authored or produced data and information are in the public domain. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter Dartnell Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5460 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Not determined. Logical_Consistency_Report: Point features present. Completeness_Report: Complete Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: 0.5 meters Vertical_Positional_Accuracy Vertical_Positional_Accuracy_Report: 0.05 percent of the water depth. Depths corrected to mean lower low water datum. Lineage: Process_Step: Process_Description: The multibeam bathymetry and acoustic backscatter data were collected along a continuous swath perpendicular to the direction of the ship using a Kongsberg Simrad EM1000 multibeam sonar system. The data are cleaned of bad navigation and depth readings and corrected for tides to mean lower low water datum. The depth readings are gridded into a common grid. The gridded data are converted to ArcInfo GRID format using ArcInfo's ASCIIGRID command. The GRID was converted to an XYZ ASCII file by using the GRIDPOINT, ADDXY, and Tables' UNLOAD commands. Process_Date: 19961030 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter Dartnell Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5460 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point 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: 0.00008 Longitude_Resolution: 0.00008 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS84 Ellipsoid_Name: WGS84 Semi-major_Axis: 6378137.00 meters Denominator_of_Flattening_Ratio: 0.003352811 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Sample of Bathymetry XYZ ASCII file > Longitude, Latitude, Depth > (decimal degrees, decimal degrees, meters) >-118.65763,34.02052,-32.661 >-118.65747,34.02052,-32.673 >-118.65731,34.02052,-32.684 >-118.65715,34.02052,-32.684 >-118.65699,34.02052,-32.684 >-118.65683,34.02052,-32.727 >-118.65668,34.02052,-32.764 >-118.65652,34.02052,-32.756 >-118.65636,34.02052,-32.739 Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey (USGS) Information Services Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd., MS-999 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: (650)329-5460 Resource_Description: C-1-96-SC Distribution_Liability: These data not intended for navigational purposes. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user. Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ASCII Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: none Fees: None Metadata_Reference_Information: Metadata_Date: 20031216 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter Dartnell Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5460 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata ("CSDGM version 2") Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: universal time