Backscatter – Outer Mainland Shelf and Slope, Gulf of Santa Catalina, southern California, U.S. Geological Survey, 2010-2011

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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: https://pubs.usgs.gov/of/2014/1094/
Online_Linkage: https://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: https://pubs.usgs.gov/of/2014/1094/
Online_Linkage: https://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 <http://walrus.wr.usgs.gov/infobank/s/s1110sc/html/s-11-10-sc.meta.html>, <http://walrus.wr.usgs.gov/infobank/s/s0711sc/html/s-07-11-sc.meta.html>, and <http://walrus.wr.usgs.gov/infobank/s/s2311sc/html/s-23-11-sc.meta.html>.

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: https://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


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