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U.S. Geological Survey Open-File Report 2010-1030

Geophysical Surveys of the San Andreas and Crystal Springs Reservoir System Including Seismic-Reflection Profiles and Swath Bathymetry, San Mateo County, California

Frequently-Anticipated Questions

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently-anticipated questions:

What does this data set describe?

Title:
Geophysical Surveys of the San Andreas and Crystal Springs Reservoir System including Seismic-Reflection Profiles and Swath Bathymetry, San Mateo County, California
Abstract:
This report describes and presents geophysical data (swath bathymetric and Chirp sub-bottom profile data) acquired by the U.S. Geological Survey in San Andreas, Upper and Lower Crystal Springs Reservoirs, San Mateo County, California. The surveys were undertaken as part of an effort to refine understanding of the location of traces of the San Andreas Fault within the reservoir system and to provide improved reservoir bathymetry for estimates of reservoir water volume. The surveys were conducted by the Western Coastal and Marine Geology (WCMG) Team of the US Geological Survey (USGS) and the San Francisco Public Utilities Commission (SFPUC) under the terms of a Cooperative Research and Development Agreement (CRADA).
Supplemental_Information:
Information for USGS Western Coastal and Marine Geology related field activities are at URLs: <http://walrus.wr.usgs.gov/infobank/f/f107ca/html/f-1-07-ca.meta.html> and <http://walrus.wr.usgs.gov/infobank/f/f207ca/html/f-2-07-ca.meta.html>.
  1. How should this data set be cited?

    David P. Finlayson, Peter J. Triezenberg and Patrick E. Hart, 2010, Geophysical Surveys of the San Andreas and Crystal Springs Reservoir System including Seismic-Reflection Profiles and Swath Bathymetry, San Mateo County, California: U.S. Geological Survey Open-File Report 2010-1030, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -122.4394
    East_Bounding_Coordinate: -122.3233
    North_Bounding_Coordinate: +37.6128
    South_Bounding_Coordinate: +37.4861

  3. What does it look like?

    <https://pubs.usgs.gov/of/2010/1030/figures/original/figure1.png> (PNG)
    map showing data collection locations

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 01-Jun-2007
    Ending_Date: 30-Apr-2008
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: tabular digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    Geographic features (Reservoir bathymetry, sub-bottom profiles, error analysis, processing sequence, and other figures are displayed in are shown as Joint Photographic Experts Group (JPEG) images at unspecified projection and scale.
    Entity_and_Attribute_Detail_Citation: none

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • David P. Finlayson, Peter J. Triezenberg and Patrick E. Hart

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Patrick E. Hart
    United States Geological Survey (USGS) Coastal and Marine Geology (CMG)
    Geophysicist
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5160 (voice)
    hart@usgs.gov

Why was the data set created?

These data are intended for science researchers, engineers, policy makers, and the general public.

How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 01-Nov-2008 (process 1 of 1)
    The bathymetry data were edited, filtered, and gridded to 1-meter cells.

    Person who carried out this activity:

    David P. Finlayson
    United States Geological Survey (USGS) Coastal and Marine Geology (CMG)
    Geophysicist
    USGS, Pacific Science Center, 400 Natural Bridges Dr.
    Santa Cruz, CA 95060
    USA

    (831) 427-4757 (voice)
    dfinlayson@usgs.gov

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Data have not been independently verified.

  2. How accurate are the geographic locations?

    1.0 meter or better

  3. How accurate are the heights or depths?

    For the swath bathymetry, the mean standard deviation of all cells in the San Andreas data set was 0.28 m (1 sigma); for Lower Crystal Springs 0.24 m (1 sigma); and for Upper Crystal Springs 0.16 m (1 sigma). No vertical accuracy is reported for the Chirp sub-bottom profiles.

  4. Where are the gaps in the data? What is missing?

    Reference the report for a description of the bathymetric and reflection profile surveys.

  5. How consistent are the relationships among the observations, including topology?

    Undetermined

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
These data are not intended for navigational purposes. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

  1. Who distributes the data set? (Distributor 1 of 1)

    United States Geological Survey (USGS) Information Services
    Box 25286
    Denver, CO 80225
    USA

    (888)ASK-USGS (voice)

  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    Please recognize the U.S. Geological Survey (USGS) as the source of this information.

    USGS-authored or produced data and information are in the public domain.

    Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user.

    Neither the U.S. Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.

    Trade, firm, or product names and other references to commercial products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 10-Aug-2003
Metadata author:
Jonathan R. Childs
United States Geological Survey (USGS) Coastal and Marine Geology (CMG)
Geophysicist
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA

(650) 329-5195 (voice)
jchilds@usgs.gov

Metadata standard:
Content Standard for Digital Geospatial Metadata ("CSDGM version 2") (FGDC-STD-001-1998)
Generated by mp version 2.9.8 on Wed Jun 10 11:05:42 2010
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For more information, contact David Finlayson.

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