2014 Interpreted Sea Floor Character - Farallon Escarpment and Rittenburg Bank, Northern California

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey (USGS)

Publication_Date: 2014

Title:

2014 Interpreted Sea Floor Character - 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:

hhttps://pubs.usgs.gov/of/2014/1234/

Description:

Abstract:

These metadata describe sea floor character data created in 2013 by the U.S. Geological Survey (USGS), Coastal and Marine Geology Program. Bathymetry and acoustic-backscatter data acquired in 2011 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 were used to produce this interpretive raster. The project was 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. Interpretation was supervised using sea floor video data collected in 2013 by NOAA, and the USGS funded by the DSCRTP.

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>, and F-03-12-NC online at <http://walrus.wr.usgs.gov/infobank/f/f0312nc/html/f-03-12-nc.meta.html>.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2011

Ending_Date: 2014

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: Benthic Habitat

Theme_Keyword: Multibeam

Theme_Keyword: Geology

Theme_Keyword: Habitat

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: <char_quickview.gif>

Browse_Graphic_File_Description: Seafloor Character of Farallon Escarpment.

Browse_Graphic_File_Type: GIF Farallon Escarpment

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. CARIS HIPS and SIPS (version 7.1.1 Service Pack 3) bathymetry processing software was used to further clean and bin the raw bathymetry. The finalized base surfaces were then exported as ASCII XYZ files (x-coordinate, y-coordinate, depth) in World Geodetic System of 1984 (WGS84, G1150) coordinates relative to the North American Vertical Datum of 1988 (NAVD-88). These data were gridded in Fledermaus (QPC) software (Version 7.1) at 2- and 10-m resolutions and the resulting surfaces were converted to ASCIIRaster format files and imported into a Geographic Information System (ESRI, ArcMap). Grids were projected horizontally to the North American Datum of 1983 (CORS96) using the ESRI WGS_1984_(ITRF00)_To_NAD_1983 (CORS96) function in ArcTools.

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

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

Process_Step:

Process_Description:

The sea floor characterization rasters were produced using the backscatter intensity and bathymetry data sets. Sea floor ruggedness rasters were produced from the bathymetry using the NOAA Benthic Terrain Modeler Tool in ArcMap. The ruggedness raster was numerically classified into two classes based on video observations of rugged sea floor (relief approximately 1 meter or more in the field of view). The backscatter intensity data was classified by hand interpretation into two classes (hard and soft) also based on the video observations. Video was collected in the survey areas on USGS Coastal and Marine Geology Field Activity F-03-12-NC. The two classified rasters were combined creating a single three class raster. The classes are soft-nonrugose (cell value 1), hard-nonrugose (cell value 2), and hard-rugose (cell value 3).

Process_Date: 2013

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Guy Cochrane

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Position: Research Geophysicist

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) 460-7554

Contact_Electronic_Mail_Address: gcochrane@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: 2.0

Ordinate_Resolution: 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 2-m Rittenburg Bank seafloor character map was originally archived as an ESRI grid with the following attributes:

Cell size = 2.0
Number of rows = 3978
Number of columns = 2705

Data type = integer

Boundary
Xmin = 468130.448966
Xmax = 473540.448966
Ymin = 4188062.18695
Ymax = 4196018.18695

Statistics
Minimum value = 1
Maximum value = 3

Coordinate system description
Projection  UTM
Zone  10
Datum  NAD83
Units  meter

The 10-m Farallon Escarpment seafloor charactermap was originally archived as an ESRI grid with the following attributes:

Cell size = 10.0
Number of rows = 2639
Number of columns = 3301

Data type = integer

Boundary
Xmin = 461613.644253
Xmax = 494623.644253
Ymin = 4166814.59992
Ymax = 4193204.59992

Statistics
Minimum value = 1
Maximum value = 3

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 seafloor character 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: Guy Cochrane

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Position: Research Geophysicist

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) 460-7554

Contact_Facsimile_Telephone: (831) 427-4748

Contact_Electronic_Mail_Address: gcochrane@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