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What does this data set describe?

Title:
Collection of swath bathymetry and sidescan amplitude data of field activity F-2-07-CA in San Andreas Lake (Reservoir), CA from 11/25/2007 to 11/30/2007
Abstract:
United States Geological Survey, Menlo Park, California. Chief Scientists: Jon Childs, David Finlayson. Collection of swath bathymetry and sidescan amplitude data (sidescansonar) of field activity F-2-07-CA in San Andreas Lake (Reservoir), CA from 11/25/2007 to 11/30/2007, <http://walrus.wr.usgs.gov/infobank/f/f207ca/html/f-2-07-ca.meta.html>.
Supplemental_Information:
Similar information is available for thousands of other USGS/CMG-related Activities.
If known, available are Activity-specific navigation, gravity, magnetics, bathymetry, seismic, and sampling data; track maps; and equipment information; as well as summary overviews, crew lists, and information about analog materials.
If available, access to physical samples is described in the "WR CMG Sample Distribution Policy" at: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Primary access to the USGS/CMG Information Bank's digital data, analog data, and metadata is provided through... <http://walrus.wr.usgs.gov/infobank/>
This page accomodates a variety of search approaches (e.g., by platform, by region, by scientist, by equipment type, etc.).
  1. How should this data set be cited?

    U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG), 20080701, Collection of swath bathymetry and sidescan amplitude data of field activity F-2-07-CA in San Andreas Lake (Reservoir), CA from 11/25/2007 to 11/30/2007.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -122.43957
    East_Bounding_Coordinate: -122.41046
    North_Bounding_Coordinate: 37.61205
    South_Bounding_Coordinate: 37.58010

  3. What does it look like?

    <http://walrus.wr.usgs.gov/infobank/f/f207ca/html/f-2-07-ca.nav.gif> (GIF)
    Trackline map of F-2-07-CA

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

    Beginning_Date: 25-Nov-2007
    Ending_Date: 30-Nov-2007
    Currentness_Reference: ground condition

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

  6. How does the data set represent geographic features?

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

      Indirect_Spatial_Reference: San Andreas Lake (Reservoir), CA
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.

      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values


  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview: Navigation with Time Stamp
    Entity_and_Attribute_Detail_Citation:
    Global positioning system (GPS) data 
    Mnemonic:       (Year, Day, Hour, Min, Sec, Tenths, Latitude, Longitude)
FORTRAN format: (i4.4, i3.3, 3i2.2, i1.1, t16, f9.5, t26, f10.5)
C format:       (%4.4i%3.3i3%2.2i%1.1i %9.5f %10.5f\\n)
Naming:         .060

Who produced the data set?

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

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

  2. Who also contributed to the data set?

    David Finlayson (Chief Scientist/Information Specialist, USGS); Mike Boyle (Electronics Technician, USGS); Larry Kooker (Electronics Technician, USGS); Gerry Hatcher (GPS Support, USGS)

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

    U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
    c/o Clint Steele
    Data Acquisition, Processing, and Storage (DAPS) Group Leader
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    csteele@usgs.gov

Why was the data set created?

These data and information are intended for science researchers, students from elementary through college, policy makers, and 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: 04-Apr-2008 (process 1 of 1)
    Navigation Data 
    02/07/2008 clint f-2-07-ca.060
/infobank/programs/refmt/tom2daps/tom2daps
Global positioning system (GPS) data


Project:     2007-331
Program:     GrafNav Version 7.80.2517
Profile:     Geographic (NAD83)
Source:      GPS Epochs(Combined)
ProcessInfo: Run (1) by TEReiss on 12/06/2007 at 17:56:14

Datum:       NAD83, (processing datum)
Master 1:    Name p178, Status ENABLED
             Antenna height 0.115 m, to L1-PC (ASH701945B_M(3), MeasDist 0.008 m to mark/ARP)
             Position 37 32 04.24774, -122 19 56.45017, 129.587 m (NAD83, Ellipsoidal hgt)
Remote:      Antenna height 2.526 m, to L1-PC (ASH701975.01B, MeasDist 2.470 m to mark/ARP)
UTC Offset:  14 s
Geoid:       Geoid03-ContUS.wpg (Absolute correction)
SD/Covariance Scaling Settings:
  Position: No scaling (1-sigma)
  Velocity: No scaling (1-sigma)
  Increase SD on kinematic float: No

Station          Date     GPSTime   GPSTime    UTCDate     UTCTime        Latitude        Longitude    H-Ell Undulat   H-MSL SDHori SDHeig AmbSt Q
                (MDY)       (HMS)     (sec)      (MDY)       (HMS)      (+/-D M S)       (+/-D M S)      (m)     (m)     (m)    (m)    (m)

    Person who carried out this activity:

    U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
    c/o Clint Steele
    Data Acquisition, Processing, and Storage (DAPS) Group Leader
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    csteele@usgs.gov

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

    U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG), Unknown, USGS/CMG Information Bank.

    Online Links:

    Other_Citation_Details: Updated daily

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

  1. How well have the observations been checked?

    Identified as best available version.

  2. How accurate are the geographic locations?

    Unspecified

  3. How accurate are the heights or depths?

    Unspecified

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

    Start and end date/times of data 

    Navigation Data
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
200711271825010    200711272342460
200711281604010    200711290001310
200711291606310    200711291938010
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST

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

    Unspecified

How can someone get a copy of the data set?

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

Access_Constraints:
Physical materials are under controlled on-site access.
If available, access to physical samples is described in the "WR CMG Sample Distribution Policy" at: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Use_Constraints:
Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Physical materials are under controlled on-site access.
Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
This information is not intended for navigational purposes.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

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

    U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
    c/o Clint Steele
    Data Acquisition, Processing, and Storage (DAPS) Group Leader
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    csteele@usgs.gov

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

    Downloadable Data F-2-07-CA 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.
    Physical materials are under controlled on-site access.
    Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
    This information is not intended for navigational purposes.
    Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 01-Jul-2008
Metadata author:
U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
c/o Clint Steele
Data Acquisition, Processing, and Storage (DAPS) Group Leader
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA

(650) 329-5055 (voice)
(650) 329-5190 (FAX)
csteele@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.2 on Tue Jul 1 04:44:50 2008