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What does this data set describe?

Title:
Geophysical data of field activity J-6-81-NC in Northern California from 08/04/1981 to 08/06/1981
Abstract:
Chief Scientist: Gary Hill. Geophysical data (minisparker, gravitycore, Shipekgrab, bathymetry, underwatertelevision, miniranger) of field activity J-6-81-NC in Northern California from 08/04/1981 to 08/06/1981, <http://walrus.wr.usgs.gov/infobank/j/j681nc/html/j-6-81-nc.meta.html>.
Supplemental_Information:

Equipment Used -
minisparker
gravitycore
Shipekgrab
bathymetry
underwatertelevision
miniranger

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), 20081216, Geophysical data of field activity J-6-81-NC in Northern California from 08/04/1981 to 08/06/1981: U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG).

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -121.93381
    East_Bounding_Coordinate: -121.78419
    North_Bounding_Coordinate: 36.80867
    South_Bounding_Coordinate: 36.66196

  3. What does it look like?

    <http://walrus.wr.usgs.gov/infobank/j/j681nc/html/j-6-81-nc.nav.gif> (GIF)
    Trackline map of J-6-81-NC
    <http://walrus.wr.usgs.gov/infobank/j/j681nc/html/j-6-81-nc.samp.gif> (GIF)
    Sampling locations map of J-6-81-NC

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

    Beginning_Date: 04-Aug-1981
    Ending_Date: 06-Aug-1981
    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: Northern California
      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 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

      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:
    Lat/Long/UTM/State Plane data 
    Mnemonic:       (Year, Day, Hour, Min, Sec, Tenths, Lat, Lon, UTMX, UTMY, StateX, StateY)
FORTRAN format: (i4.4, i3.3, 3i2.2, i1.1, t16, f9.5, t26, f10.5, t38, f9.2, t48, f10.2, t60, f12.2, t72, f12.2)
C format:       (%4.4i%3.3i3%2.2i%1.1i %9.5f %10.5f %9.2f %10.2f %12.2f %12.2f\\n)
Naming:         .650

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?

    Gary Hill (Chief Scientist, USGS Western Region)

  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: 06-Dec-1995 (process 1 of 1)
    Navigation Data 
    Converted to time format with year at start.

11/20/85 EDM DISK$USERDISK:[EDM.TEMP.J681NC]J681NC.650;
DRB0:[DRS.REFMT]REFORMAT.EXE;4

Input was...
11/18/85 EDM USR$DISK:[CLINT.NAV1.J681NC]J681NC.050;
DRA1:[EDM]REFORMAT.EXE;

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

    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 (j-6-81-nc.650)
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
198107270724320    198107270729100
198107270735490    198107270736490
198107270742560    198107270801280
198107270819500    198107271051200
198107271104450    198107271327150
198107271337060    198107271339060
198107271346490    198107271609480
198107280634180    198107280719250
198107280807480    198107281315570
198107281332580    198107281451290
198107290639250    198107290642210
198107290648000    198107290846510
198107290902320    198107291112320
198107291124110    198107291346190
198107291401590    198107291626590
198107300704100    198107300708100
198107300721150    198107300738330
198107300743520    198107300746220
198107300751520    198107300752520
198107300758570    198107300833270
198107300846420    198107300846420
198107300858460    198107300900160
198107300906240    198107300927190
198107300938440    198107301013140
198107301019100    198107301203550
198107301230280    198107301426140
198107310701350    198107310905350
198107310913420    198107310948140
198107310956320    198107311237000
198107311246410    198107311437160
198108030649070    198108030650070
198108030657280    198108031222040
198108040635470    198108040635470
198108040641070    198108041209140
198108041220220    198108041333500
198108050635140    198108050817570
198108050825170    198108050943220
198108050948340    198108051140380
198108051156270    198108051247270
198108051253350    198108051344350
198108060647360    198108060920330
198108060927260    198108061121270
198108061127030    198108061329020
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 J-6-81-NC 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: 16-Dec-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 Dec 16 03:29:57 2008