Isopachs--Salt Point to Drakes Bay, 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: Samuel Y. Johnson

Originator: Stephen R. Hartwell

Originator: Janet T. Watt

Originator: Ray W. Sliter

Publication_Date: 2014

Title: Isopachs--Salt Point to Drakes Bay, California

Geospatial_Data_Presentation_Form: raster digital data

Larger_Work_Citation:

Citation_Information:

Originator: Nadine E. Golden

Publication_Date: 2013

Title: California State Waters Map Series Data Catalog

Geospatial_Data_Presentation_Form: database

Series_Information:

Series_Name: Data Series

Issue_Identification: DS 781

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: <https://pubs.usgs.gov/ds/781/>

Description:

Abstract:

This part of DS 781 presents data for the sediment-thickness map of the Salt Point to Drakes Bay, California, region. The raster data file is included in "SedimentThickness_SaltPointToDrakesBay.zip," which is accessible from <https://pubs.usgs.gov/ds/781/SaltPointToDrakesBay/data_catalog_SaltPointToDrakesBay.html>.
As part of the USGS's California State Waters Mapping Project, a 20-m grid of sediment thickness for the seafloor within the 3-nautical mile limit between Salt Point and Drakes Bay was generated from seismic-reflection data collected in 2009 (USGS activity (S-8-09-NC) supplemented with outcrop and geologic structure from DS 781. The resulting grid covers an area of approximately 717 sq km. The volume of sediment accumulated since the Last Glacial Maximum is approximately 6,800 million cubic meters. Contours at 2.5-meter intervals were derived from this grid.

Purpose:

These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.

Supplemental_Information:

Sediment thickness and volume within each of the map areas

 Salt Point    38.639622 38.479620 -123.482704 -123.278809
 Fort Ross     38.556494 38.396794 -123.305678 -123.102404
 Bodega Bay    38.411542 38.252067 -123.172536 -122.969899
 Tomales Point 38.255180 38.095716 -123.097226 -122.895023
 Point Reyes   38.098263 37.938810 -123.094511 -122.892742
 Drakes Bay    38.038192 37.878737 -122.966411 -122.764735

   -----sediment thickness--------
                  Area            Volume
  Map block      (sq km)  Mean  (million cu m)
  Salt Point      117     12.5      1464
  Fort Ross       100     21.5      2157
  Bodega Bay      128      8.5      1084
  Tomales Point   108      2.1       230
  Point Reyes     175      7.9      1387
  Drakes Bay       89      5.3       476

Additional information about the field activities from which this data set was derived are available online at

 <http://walrus.wr.usgs.gov/infobank/s/s809nc/html/s-8-09-nc.meta.html>

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2009

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -123.473993

East_Bounding_Coordinate: -122.762732

North_Bounding_Coordinate: 38.640196

South_Bounding_Coordinate: 37.868433

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: marine geology

Theme_Keyword: coastal geology

Theme_Keyword: sediment thickness

Theme_Keyword: sediment isopach

Theme_Keyword: seismic-reflection data

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: environment

Theme_Keyword: geoscientificInformation

Theme_Keyword: oceans

Place:

Place_Keyword_Thesaurus: Geographic Names Information System

Place_Keyword: Pacific Ocean

Place_Keyword: State of California

Place_Keyword: Bodega Bay

Place_Keyword: Marin County

Place_Keyword: Sonoma County

Place_Keyword: Point Reyes

Access_Constraints:

If physical samples or materials are available, constraints on their on-site access are described in "WR CMG Sample Distribution Policy" at URL: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>

Use_Constraints:

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.

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 database has been approved for release and publication by the Director of the 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 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_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Program

Contact_Person: Stephen Hartwell

Contact_Position: Geologist

Contact_Address:

Address_Type: physical address

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060

Country: USA

Contact_Voice_Telephone: (831) 460-7814

Contact_Facsimile_Telephone: (831) 427-4748

Contact_Electronic_Mail_Address: shartwell@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<https://pubs.usgs.gov/ds/781/SaltPointToDrakesBay/images/SedimentThickness_SaltPointToDrakesBay.jpg>

Browse_Graphic_File_Description: map of sediment thickness contours

Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment:

Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.0

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Data points are approximately 1 m apart along tracklines and 1000-2000 m apart between tracks. 50-m cell size for interpolation is better supported along track than between.

Logical_Consistency_Report: All vector geometry and attributes present.

Completeness_Report:

Sediment thickness data points exported from Seisworks profiling software were processed within the California 3-nmi limit.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The chirp sonar instrument is deployed under the research vessel with about 10m of variation in position. The sparker position may vary as much as 20m from the navigation reference on the vessel.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Estimated to be approximately 1 m, along the track lines where data is well constrained, but may be much greater in areas where interpolation occurred.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

U.S. Geological Survey (USGS) , Coastal and Marine Geology Program (CMGP)

Publication_Date: 2013

Title:

Seismic-reflection data acquisition data of field activity S-8-09-NC Stinson Beach to point Arena 09/08/2009 to 09/30/2009

Publication_Information:

Publication_Place: Menlo Park, CA

Publisher:

U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)

Online_Linkage: <http://walrus.wr.usgs.gov/infobank/gos/s-8-09-nc.fmeta.xml>

Online_Linkage:

<http://walrus.wr.usgs.gov/infobank/s/s809nc/html/s-8-09-nc.meta.html>

Type_of_Source_Media: ASCII lat/long shot point files

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20090908

Ending_Date: 20090930

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: S-8-09-NC

Source_Contribution:

Digital seismic data used to interpret subsurface geologic structure

Process_Step:

Process_Description:

Chirp and sparker seismic-reflection data from USGS field activity S-8-09-NC were imported to SEISWORKS.

Process_Date: 2013

Process_Step:

Process_Description:

Seabed and depth to Last Glacial Maximum horizons digitized in Seisworks.

Process_Date: 2013

Process_Step:

Process_Description:

Data exported and converted with 1500m/sec velocity in water and 1600 m/sec velocity in sediment.

Process_Date: 2013

Process_Step:

Process_Description:

X, Y locations and sediment thickness value Z imported to ArcGIS format as points, interpolated to preliminary surface with TopoRaster. Supplemental manually generated contours were combined for secondary calculation.

Process_Date: 2013

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 4276

Column_Count: 3095

Vertical_Count: 1

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: 0.999600

Longitude_of_Central_Meridian: -117.000000

Latitude_of_Projection_Origin: 0.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 20.000000

Ordinate_Resolution: 20.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview: Grid value is thickness of sediment in meters.

Entity_and_Attribute_Detail_Citation: none

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Program

Contact_Person: Stephen Hartwell

Contact_Position: Geologist

Contact_Address:

Address_Type: physical address

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060

Country: USA

Contact_Voice_Telephone: (831) 460-7814

Contact_Facsimile_Telephone: (831) 427-4748

Contact_Electronic_Mail_Address: shartwell@usgs.gov

Distribution_Liability:

These databases, identified as sediment thickness for the Salt Point to Drakes Bay Region, California have been approved for release and publication by the U.S. Geological Survey (USGS). Although these databases have been subjected to rigorous review and are 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: ZIP

Format_Information_Content:

File SedimentThickness_SaltPointToDrakesBay.zip contains ESRI Shapefile, SedimentThickness_SaltPointToDrakesBay, with associated files created by ArcGIS.

Transfer_Size: 6.0 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<https://pubs.usgs.gov/ds/781/SaltPointToDrakesBay/data/SedimentThickness_SaltPointToDrakesBay.zip>

Fees: none

Metadata_Reference_Information:

Metadata_Date: 2013

Metadata_Review_Date: 2013

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Program

Contact_Person: Stephen Hartwell

Contact_Position: Geologist

Contact_Address:

Address_Type: physical address

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060

Country: USA

Contact_Voice_Telephone: (831) 460-7814

Contact_Facsimile_Telephone: (831) 427-4748

Contact_Electronic_Mail_Address: shartwell@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time