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What does this data set describe?

Title:
Data of field activity 85028 (F-2-85-GM) in Gulf Mexico from 09/05/1985 to 09/29/1985
Abstract:
United States Geological Survey, Reston, Virginia. Chief Scientists: Bonnie McGregor, Neil Kenyon. Data (sidescansonar, airgun, 3dot5khz, 10khz, magnetics, loranc, transitsatellite, gps) of field activity 85028 (F-2-85-GM) in Gulf Mexico from 09/05/1985 to 09/29/1985, <http://walrus.wr.usgs.gov/infobank/f/f285gm/html/f-2-85-gm.meta.html>.
Supplemental_Information:

Equipment Used -
sidescansonar GLORIA long-range side-scan sonar
airgun 160 and 80 cu in single-channel seismic-reflection system
3dot5khz 3.5 khz bathymetry
10khz 10 khz bathymetry
magnetics
loranc Loran C
transitsatellite Satellite receiver
gps Global Positioning System
Notes -
LEG 2:
&nbsp;&nbsp;
Leg 2 focused in the central Gulf of Mexico on the Mississippi Fan
seaward of Louisiana, Mississippi, Alabama, and Florida. The area mapped
with GLORIA on this leg was approximately 45,000 square nautical miles.
&nbsp;&nbsp;
Data Summary - Leg 2
&nbsp;&nbsp;
At sea total number of days: 24 days
&nbsp;&nbsp;
Mileage for each type of data collected:
&nbsp;&nbsp;
GLORIA sidescan 4520 nm 8362 km
&nbsp;&nbsp;
3.5 kHz 4543 nm 8405 km
&nbsp;&nbsp;
10 kHz 4594 nm 8504 km
&nbsp;&nbsp;
air gun 4330 nm 8010 km
&nbsp;&nbsp;
magnetometer 4594 nm 8504 km
&nbsp;&nbsp;
Comments Leg 2:
&nbsp;&nbsp;
The cruise was very successful. Equipment down time was minimal.
The warm surface water temperature continued to limit the GLORIA range
necessitating closer line spacing than planned. The presence of the Loop
Current for the last half of the cruise not only provided warm surface
water temperatures, but also a strong current, often approaching 4 knots.
The current shear prevented the GLORIA fish from towing parallel to the
ship's track, introducing some distortion in the mosaic. In the northeast
portion of the Gulf, near DeSoto Canyon, fishing boats with lines set
across our proposed track caused a problem requiring several lines to be
terminated early. Leg 3A will collect data to cover these data gaps. An
additional 8 days will be necessary on Leg 3 to complete the coverage of the
Mississippi Fan.
&nbsp;&nbsp;
The objective of this leg was to map the surface features in the
Mississippi Fan area. Although the channel of the Mississippi could be
identified on the mid-fan, over much of the fan the channel was obscured by
a major submarine slide or slides. Flow patterns were well displayed on the
surface and the slide could be mapped to the base of the West Florida
Escarpment. Another submarine slide was also present in the DeSoto Canyon
area. The meandering channel from DeSoto Canyon was traced from this
slide seaward parallel to the escarpment. Mass wasting appears to be an
important process in distributing sediments in the deep water of the central
Gulf. The Sigsbee Escarpment was mapped to the east as far as the
Mississippi Canyon. Isolated salt diapirs were present to the east of the
Mississippi Canyon.
Publications -
Paskevich, Valerie F.; Wong, Florence L.; O'Malley, John J.; Stevenson,
Andrew J.; Gutmacher, Christina E., 2010, GLORIA sidescan-sonar imagery
for parts of the U.S. Exclusive Economic Zone and adjacent areas: U.S.
Geological Survey Open-File Report 2010-1332,
<A HREF="<http://pubs.er.usgs.gov/publication/ofr20101332>"
target="OF1"><http://pubs.er.usgs.gov/publication/ofr20101332>.
&nbsp;&nbsp;
Twichell, David C., and Paskevich, Valerie, 1996, GLORIA sidescan sonar
field data and navigation data collected in the Gulf of Mexico during
R/V Farnella cruises in 1982 and 1985: U.S. Geological Survey Open-File
Report 96-707,
<A HREF="
<http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM>"
target="OF2"><http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM>.

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) <http://www.usgs.gov/>, Coastal and Marine Geology Program (CMGP) <http://marine.usgs.gov/>, 20140318, Data of field activity 85028 (F-2-85-GM) in Gulf Mexico from 09/05/1985 to 09/29/1985: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -90.61030
    East_Bounding_Coordinate: -85.14300
    North_Bounding_Coordinate: 29.20430
    South_Bounding_Coordinate: 25.08760

  3. What does it look like?

    <http://walrus.wr.usgs.gov/infobank/f/f285gm/html/f-2-85-gm.nav.gif> (GIF)
    Trackline map of F-2-85-GM

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

    Beginning_Date: 05-Sep-1985
    Ending_Date: 29-Sep-1985
    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: Gulf Mexico
      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.

      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 <http://walrus.wr.usgs.gov/infobank/programs/html/definition/nav.html>


Who produced the data set?

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

  2. Who also contributed to the data set?

    Bonnie McGregor (Chief Scientist, USGS Miami); Dave Twichell (Chief Scientist, USGS Woods Hole); John Schlee (Geologist, USGS Woods Hole); Ron Circe (Unsp, USGS Woods Hole); John Wagner (Geologist, LSU (Louisiana State University, USA)); Malcolm Harris (GLORIA Engineer, IOS (Institute of Oceanographic Sciences, U.K.)); Neil Kenyon (Chief Scientist, IOS); Eric Darlington (GLORIA Engineer, IOS); Colin Jacobs (Geologist, IOS); Ross Walker (GLORIA Engineer, IOS); Robert Wallace (Airgun Tech, IOS); Stephen Williams (Geologist, IOS); Martin Beney (Shipboard Computing, RVS (Research Vessel Services, U.K.)); Roy Hadgraft (Captain, J. Marr and Sons)

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

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.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: 18-Mar-2014 (process 1 of 1)
    Navigation Data
    /infobank/f/f285gm/nav/f-2-85-gm.060
    time/lat/long style, multi-record, in caps, without tabs
    temporal-spatial data
    copied and reformatted from Navigation Data R/V Farnella 85, Leg 2 in:
    Twichell, David C., and Paskevich, Valerie, 1996, GLORIA sidescan sonar field data
    and navigation data collected in the Gulf of Mexico during R/V Farnella cruises
    in 1982 and 1985: U.S. Geological Survey Open-File Report 96-707,
    <http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM>.
     - C Degnan, 3/18/2014
           1         2         3
    3456789012345678901234567890123456
    
    

    Person who carried out this activity:

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

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

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Unknown, USGS/CMG Information Bank <http://walrus.wr.usgs.gov/infobank/>: U.S. Geological Survey (USGS) <http://www.usgs.gov> Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

    Online Links:

    Other_Citation_Details:
    Paskevich, Valerie F.; Wong, Florence L.; O'Malley, John J.; Stevenson, Andrew J.; Gutmacher, Christina E., 2010, GLORIA sidescan-sonar imagery for parts of the U.S. Exclusive Economic Zone and adjacent areas: U.S. Geological Survey Open-File Report 2010-1332, <A HREF="<http://pubs.er.usgs.gov/publication/ofr20101332>" target="OF1"><http://pubs.er.usgs.gov/publication/ofr20101332>. &nbsp;&nbsp; Twichell, David C., and Paskevich, Valerie, 1996, GLORIA sidescan sonar field data and navigation data collected in the Gulf of Mexico during R/V Farnella cruises in 1982 and 1985: U.S. Geological Survey Open-File Report 96-707, <A HREF="<http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM>" target="OF2"><http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM>.



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 (f-2-85-gm.060 [GPS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198509061808000    198509280232000
    198509280238000    198509281800000
    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) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

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

    Downloadable Data 85028 (F-2-85-GM) data set <http://walrus.wr.usgs.gov/infobank/f/f285gm/html/f-2-85-gm.meta.html>

  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?

    • Availability in digital form:

Data format: ASCII Size: 1.0
Network links: <http://walrus.wr.usgs.gov/infobank/f/f285gm/html/f-2-85-gm.nav.html>

  • Cost to order the data: None


  • Who wrote the metadata?

    Dates:
    Last modified: 18-Mar-2014
    Metadata author:
    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

    Metadata standard:
    FGDC Content Standards for Digital Geospatial Metadata <http://www.fgdc.gov/> (FGDC-STD-001-1998 <http://www.its.nbs.gov/nbs/meta/meta.html>)


    Generated by mp version 2.9.13 on Tue Mar 18 14:17:24 2014