Acoustic Backscatter Data Collected in 2011 - Farallon Escarpment and Rittenburg Bank, Northern California

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Metadata:

Identification_Information:


Citation:
Citation_Information:
Originator: U.S. Geological Survey (USGS)
Publication_Date: 2014
Title:
Acoustic Backscatter Data Collected in 2011 - Farallon Escarpment and Rittenburg Bank, Northern California
Geospatial_Data_Presentation_Form: Raster
Online_Linkage: https://pubs.usgs.gov/of/2014/1234/datacatalog.html



Larger_Work_Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Guy R. Cochrane
Originator: David P. Finlayson
Publication_Date: 2014
Title:
Bathymetry, Acoustic Backscatter, and Seafloor Character - Farallon Escarpment and Rittenburg Bank, Northern California
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2014-1234
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage:
https://pubs.usgs.gov/of/2014/1234/

Description:
Abstract:
These metadata describe acoustic backscatter data collected in 2011 by the U.S. Geological Survey (USGS), Coastal and Marine Geology Program. Bathymetry and acoustic-backscatter data were acquired along the upper slope of the Farallon Escarpment as well as Rittenburg Bank located within the Gulf of the Farallones National Marine Sanctuary offshore of the San Francisco Bay area. The surveys were funded by the National Oceanic and Atmospheric Administration (NOAA) Deep Sea Coral Research and Technology Program (DSCRTP) to identify potential Deep Sea Coral (DSC) habitat prior to planned sampling efforts.
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 bathymetric 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, F-01-11-NC, online at <http://walrus.wr.usgs.gov/infobank/f/f0111nc/html/f-01-11-nc.meta.html>.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2011
Ending_Date: 2012
Currentness_Reference: ground condition

Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed


Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.43
East_Bounding_Coordinate: -123.07
North_Bounding_Coordinate: 37.92
South_Bounding_Coordinate: 37.65


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: Farallon Escarpment
Place_Keyword: Rittenburg Bank
Place_Keyword: San Francisco
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: Guy Cochrane
Contact_Organization:
U.S. Geological Survey, Pacifc Coastal and Marine Science Center
Contact_Position: Research Geophysicist
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) 460-7554
Contact_Facsimile_Telephone: (831) 427-4748
Contact_Electronic_Mail_Address: gcochrane@usgs.gov

Browse_Graphic:
Browse_Graphic_File_Name: <back_quickview.gif>
Browse_Graphic_File_Description: Backscatter image of Farallon Escarpment and Rittenburg Bank.
Browse_Graphic_File_Type: GIF Farallon Escarpment and Rittenburg Bank


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


Lineage:
Process_Step:
Process_Description:
Multibeam mapping took place over 16 days from September 6 through September 21, 2011 (U.S. Geological Survey field activity F-01-11-NC). The survey was conducted using a 100-kHz Reson 7111 multibeam echosounder. The 7111 is a horseshoe shaped sonar that was mounted on the 67-foot NOAA National Marine Sanctuary Program's research vessel Fulmar and affixed to a hull brace. Differentially Corrected Global Positioning System (DGPS) navigational data and measurements of vessel motion were combined in the F190 hardware to produce a high-precision vessel attitude packet. This packet was transmitted to the PDS2000 acquisition software in real time and combined with 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 PDS2000 software. Finally, the processed data were stored line-by-line as Reson S7K files.

Process_Date: 2011
Process_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_Electronic_Mail_Address: pdartnell@usgs.gov

Process_Step:
Process_Description:
The multibeam-echosounder 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 Reson 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 line files were then mosaiced into 2-m resolution (Rittenburg Bank) and 10-m resolution (Farallon Escarpment) images. The images were then exported as georeferenced TIFF images, imported into a GIS, and converted to GRIDs at 2- and 10-m resolutions. The grids were projected horizontally from WGS-84 coordinates to NAD-83 (CORS96) coordinates 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: 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_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: 10
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.00000
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, 2.0
Ordinate_Resolution: 10.0, 2.0
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 10-m Farallon Escarpment backscatter imagery was originally archived as an ESRI grid with the following attributes: 
Cell size = 10.0
Number of rows = 2873
Number of columns = 3131

Data type = floating point

Boundary
Xmin = 462385
Xmax = 493695
Ymin = 4167267
Ymax = 4195997

Statistics
Minimum value = 184.26
Maximum value = 255
Mean = 228.64
Standard deviation = 14.85

Coordinate system description
Projection  UTM
Zone  10
Datum  NAD83
Units  meter
The 2-m Rittenburg Bank backscatter imagery was originally archived as an ESRI grid with the following attributes: 
Cell size = 2.0
Number of rows = 3959
Number of columns = 2656

Data type = floating point

Boundary
Xmin = 468217
Xmax = 473529
Ymin = 4188068
Ymax = 4195986

Statistics
Minimum value = 175.66
Maximum value = 231.20
Mean = 313.88
Standard deviation = 3.88

Coordinate system description
Projection  UTM
Zone  10
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 acoustic backscatter of the Farallon Escarpment and Rittenburg Bank, northern California 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: ASCIIRASTER and geoTIFF
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://pubs.usgs.gov/of/2014/1234/
Fees: None


Metadata_Reference_Information:


Metadata_Date: 20140315
Metadata_Review_Date: 20140315



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

Generated by mp version 2.9.26 on Tue Jul 22 12:12:56 2014