Metadata: Identification_Information: Citation: Citation_Information: Originator: United States Geological Survey (USGS) Publication_Date: 20140509 Title: Backscatter – Outer Mainland Shelf and Slope, Gulf of Santa Catalina, southern California, U.S. Geological Survey, 2010-2011 Geospatial_Data_Presentation_Form: Raster Online_Linkage: http://pubs.usgs.gov/of/2014/1094/ Online_Linkage: http://dx.doi.org/10.3133/ofr20141094 Larger_Work_Citation: Citation_Information: Originator: Peter Dartnell Originator: James E. Conrad Originator: Holy F. Ryan Originator: David P. Finlayson Publication_Date: 20140509 Title: Bathymetry and Acoustic Backscatter-Outer Mainland Shelf and Slope, Gulf of Santa Catalina, Southern California Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: OFR 2014-1094 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2014/1094/ Online_Linkage: http://dx.doi.org/10.3133/ofr20141094 Description: Abstract: In 2010 and 2011, the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC), collected bathymetry and acoustic-backscatter data from the outer shelf and slope offshore the Oceanside region in southern California. These data were acquired as part of the USGS Marine Geohazards Program. Assessment of the hazards posed by offshore faults, submarine landslides, and tsunamis are facilitated by accurate and detailed bathymetric data. The surveys were conducted using the USGS R/V Parke Snavely outfitted with a 100 kHz Reson 7111 multibeam echosounder. While the surveys were focused on the collection of bathymetric data, the limited acoustic backscatter data are made available. These metadata describe the backscatter data provided in the report. The backscatter from the three separate surveys were not merged and these metadata describe the three separate backscatter images. 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 identify seafloor features. These data are not intended for navigational purposes. Supplemental_Information: Information for the related USGS Pacific Coastal and Marine Science Center data collection field activities, S-11-10-SC, S-07-11-SC, and S-23-11-SC, online at , , and . Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2010 Ending_Date: 2011 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -117.86 East_Bounding_Coordinate: -117.33 North_Bounding_Coordinate: 33.46 South_Bounding_Coordinate: 33.00 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: Marine Geology Theme_Keyword: Multibeam Theme_Keyword: Geology Theme_Keyword: Bathymetry Theme_Keyword: Backscatter Theme_Keyword: Water Depth Theme_Keyword: Ocean Floor Topography Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: CMGP Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme_Keyword: geoscientificinformation Theme_Keyword: imageryBaseMapsEarthCover Theme_Keyword: oceans Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Place_Keyword: Oceanside Place_Keyword: Dana Point Place_Keyword: State of California Place: Place_Keyword_Thesaurus: General Place_Keyword: California Place_Keyword: CA Place_Keyword: USA Access_Constraints: None Use_Constraints: USGS-authored or produced data and information are in the public domain. Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey. This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data. Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter Dartnell Contact_Organization: U.S. Geological Survey, Pacifc Coastal and Marine Science Center Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridge Dr. City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 460-7415 Contact_Facsimile_Telephone: (831) 427-4709 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Not applicable for raster data. Logical_Consistency_Report: Unspecified Completeness_Report: Complete Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Estimated to be no less than 2 m, owing to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Not applicable to backscatter data. Lineage: Process_Step: Process_Description: Three USGS surveys were conducted over a 2-year period (PCMSC Field Activity IDOs: S-11-10-SC, S-23-10-SC, and S-07-11-SC). The three surveys were conducted using a 100 kHz Reson 7111 multibeam echosounder. The 7111 is a horseshoe-shaped sonar that was mounted on the 34-foot USGS mapping vessel R/V Parke Snavely and affixed to a hull brace. Differentially Corrected Global Positioning System (DGPS) navigational data and measurements of vessel motion were combined in a CodaOctopus F190 inertial measurement unit (IMU) and passed to the sonar hardware and data collection software. Sound velocity measurements were collected continuously with an Applied Micro Systems Micro sound velocimeter (SV) deployed on the transducer frame for real-time sound velocity adjustments at the transducer-water interface. In addition, sound velocity profiles (SVP) were collected approximately every 2 hours throughout each survey day with an Applied Micro Systems. The navigation and vessel motion measurements were transmitted to the acquisition software in real time and combined with the instantaneous sound velocity measurements at the transducer head before each ping. The returned samples were projected to the seafloor using a ray-tracing algorithm working with the previously measured sound-velocity profiles in the acquisition software. Tide measurements relative to the North American Vertical Datum of 1988 (NAVD 1988) were downloaded from the La Jolla tide station 9410230. Original soundings were referenced to the World Geodetic System of 1984 (WGS 1984) relative to the North American Vertical Datum of 1988 (NAVD 1988). Process_Date: 2011 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Pete Dartnell Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Dr. City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 460-7415 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Process_Step: Process_Description: Backscatter data were processed using the Fledermaus (version 7.3.2) integration of Geocoder. Caris HDCS line files were exported as GSF line files and imported into Fledermaus along with the corresponding original S7K files. Adjustments were made to the line files including TX/RX (transmit/receive) power gain, beam pattern, and adaptive angle-varying gain corrections. The lines files were then mosaicked into 10-m resolution images. The images were then exported as georeferenced TIFF images, imported into a GIS, and converted to GRIDs at 10-m resolution. Grids were projected horizontally to the North American Datum of 1983 (NAD83, CORS96) using the ESRI "WGS_1984_(ITRF00)_To_NAD_1983_CORS96" function in ArcTools. Finally the GRIDs were exported as geoTIFF images. Process_Date: 2013 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Pete Dartnell Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Dr. City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 460-7415 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 11 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -117.00000 Latitude_of_Projection_Origin: 0.00000 False_Easting: 500000.0 False_Northing: 0.00 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 10.0 Ordinate_Resolution: 10.0 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: NAD83 Ellipsoid_Name: GRS80 Semi-major_Axis: 6378137.00 meters Denominator_of_Flattening_Ratio: 0.003352811 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The 2010 backscatter imagery (USGS FACS-ID S-11-10-SC) was originally archived as a geoTIFF image with the following attributes: >Cell size = 10.0 >Number of rows = 2788 >Number of columns = 1859 > >Data type = floating point > >Boundary >Xmin = 449545 >Xmax = 468125 >Ymin = 3652878 >Ymax = 3680743 > >Statistics >Minimum value = 0 >Maximum value = 255 >Mean = 211.43 >Standard deviation = 59.56 > >Coordinate system description >Projection UTM >Zone 11 >Datum NAD83 >Units meter The 2010 backscatter imagery (USGS FACS-ID S-23-10-SC) was originally archived as a geoTIFF image with the following attributes: >Cell size = 10.0 >Number of rows = 4324 >Number of columns = 2636 > >Data type = floating point > >Boundary >Xmin = 430114 >Xmax = 456464 >Ymin = 3653270 >Ymax = 3696493 > >Statistics >Minimum value = 0 >Maximum value = 255 >Mean = 223.13 >Standard deviation = 55.64 > >Coordinate system description >Projection UTM >Zone 11 >Datum NAD83 >Units meter The 2011 backscatter imagery (USGS FACS-ID S-07-11-SC) was originally archived as a geoTIFF image with the following attributes: >Cell size = 10.0 >Number of rows = 2168 >Number of columns = 3010 > >Data type = floating point > >Boundary >Xmin = 421818 >Xmax = 451904 >Ymin = 3678705 >Ymax = 3700375 > >Statistics >Minimum value = 0 >Maximum value = 255 >Mean = 229.42 >Standard deviation = 51.82 > >Coordinate system description >Projection UTM >Zone 11 >Datum NAD83 >Units meter Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-4309 Distribution_Liability: This database, identified as Backscatter of the outer mainland shelf and slope, Gulf of Santa Catalina, CA has been approved for release and publication by the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. These data are not intended for navigational use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: geoTIFF Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2014/1094/ Fees: None Metadata_Reference_Information: Metadata_Date: 20130915 Metadata_Review_Date: 20140508 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter Dartnell Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Dr. City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 460-7415 Contact_Facsimile_Telephone: (831) 427-4709 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