ctd_02 - Oceanographic Data Device Location for Joint USGS Cruise 02051 and NOAA RB0208

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Frequently-anticipated questions:

What does this data set describe?

Title:
ctd_02 - Oceanographic Data Device Location for Joint USGS Cruise 02051 and NOAA RB0208
Abstract:
This data set shows a location where the CTD (Conductivity -Temperature - Depth) device was used. CTD were determined while in the Caribbean Sea during the USGS Science Cruise 02051 in collaboration with NOAA Research Cruise RB0208 from 24 September to 30 September 2002, Leg I of III. The point location attributes are longitude, latitude, and date of placement in the water. It is in Environmental Science Research Institution (ESRI) shapefile format, geometric point data.
  1. How should this data set be cited?

    National Oceanic and Atmospheric Administration (NOAA), and U.S. Geological Survey (USGS), 2005, ctd_02 - Oceanographic Data Device Location for Joint USGS Cruise 02051 and NOAA RB0208: Open-File Report 2005-1066, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Brink, Uri ten , Smith, Lt. Shep , Worley, Chuck, Stepka, Thomas, and Williams, Glynn, 2005, Project PROBE Leg I - Report and Archive of Multibeam Bathymetry and Acoustic Backscatter, CTD/XBT and GPS Navigation Data Collected During USGS Cruise 02051 (NOAA Cruise RB0208) Puerto Rico Trench, September 24, 2002 to September 30, 2002.: Open-File Report 2005-1066, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -66.011000
    East_Bounding_Coordinate: -66.011000
    North_Bounding_Coordinate: 20.058500
    South_Bounding_Coordinate: 20.058500

  3. What does it look like?

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

    Beginning_Date: 24-Sep-2002
    Ending_Date: 30-Sep-2002
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

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

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Entity point (1)

    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 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Depth_System_Definition:

  7. How does the data set describe geographic features?

    ctd_02
    Shapefile Attribute Table (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    ID
    A unique sequential number assigned to a particular object. (Source: Software computed)

    LATITUDE
    The north/south coordinate system reference point (location) where the CTD device was cast into water. (Source: NOAA shipboard technician)

    Range of values
    Minimum:19.0000
    Maximum:19.6166
    Units:decimal degrees
    Resolution:0.0001

    LONGITUDE
    The east/west coordinate system reference point (location) where the XBT device was launched into water. (Source: NOAA shipboard technician)

    Range of values
    Minimum:-62.83330
    Maximum:-68.40000
    Units:decimal degrees
    Resolution:0.00001

    WAYPTS
    Name assigned to designate CTD placement in water location for device. (Source: USGS)

    ValueDefinition
    CTDConductivity, Temperature, and Density Device

    TIME
    The recorded time when the device/equipment was launched into the water. Value Recorded as Universal Time Coordinated (UTC). (Source: USGS)

    Character string in the form of hh:mm:ss

    DATE_
    The recorded date when the device/equipment was launched into the water. (Source: USGS)

    Character string in the form of mmddyyy

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?

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

    Glynn Williams
    U.S. Geological Survey
    Information Technician (Geo/GIS)
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2290 (voice)
    (508) 457-2310 (FAX)
    gwilliams@usgs.gov

    Hours_of_Service: 8:00AM to 5:00PM; M-F

Why was the data set created?

To derive sound velocity information to be used for sonar mapping calibration and to determine some water characteristics

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)

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

    Date: 2002 (process 1 of 4)
    The CTD data file was received from the R/V Ron Brown Oceanographic data network, sent directly to the central storage system and logged to a spreadsheet file.

    Person who carried out this activity:

    Lt. Shep Smith
    Office of Marine and Aviation Operations (OMAO)
    Hydrographer
    1315 East West Highway
    Silver Springs, MD 20910
    USA

    (301) 713-3431 (voice)

    Date: 2005 (process 2 of 4)
    The CTD spreadsheet file was reformatted as table input file for ArcView.

    Person who carried out this activity:

    Glynn Williams
    U.S. Geological Survey
    Information Technician (Geo/GIS)
    384 Woods Hole Road
    Woods Hole, MA 02543-1589
    USA

    (508) 548-8700 x2290 (voice)
    (508) 457-2310 (FAX)
    gwilliams@usgs.gov

    Hours_of_Service: 8AM to 5PM; M-F
    Date: 2005 (process 3 of 4)
    CTD table location file saved as ArcView shapefile. ArcView 3.2 used to process shapefile.

    Person who carried out this activity:

    Glynn Williams
    U.S. Geological Survey
    Information Technician (Geo/GIS)
    384 Woods Hole Road
    Woods Hole, MA 02543-1589
    USA

    (508) 548-8700 x2290 (voice)
    (508) 457-2310 (FAX)
    gwilliams@usgs.gov

    Hours_of_Service: 8AM to 5PM; M-F
    Data sources produced in this process:
    • ctd_02.dbf
    • ctd_02.shp
    • ctd_02.shx
    • ctd_02.prj
    • ctd_02.sbn

    Date: 2005 (process 4 of 4)
    CTD shapefile dataum change from NAD 1983 to WGS 1984

    Person who carried out this activity:

    Glynn Williams
    U.S. Geological Survey
    Information Technician (Geo/GIS)
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2290 (voice)
    508-457-2310 (FAX)
    gwilliams@usgs.gov

    Hours_of_Service: 8:00AM to 4:30PM; M-F
  3. What similar or related data should the user be aware of?

    Brink, Uri ten , Danforth, William, Polloni, Chris, Parker, Castle Eugene , Uozumi, Toshi, and Williams, Glynn, 2004, Project PROBE Leg II - Final Report and Archive of Swath Bathymetric Sonar, CTD/XBT and GPS Navigation Data Collected During USGS Cruise 03008 (NOAA Cruise RB0303) Puerto Rico Trench 18 February - 7 March, 2003: Open-file Report 2004-1400, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM

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

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

    The GPS was considered to have a horizontal accuracy of < 10 meters.

  3. How accurate are the heights or depths?

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

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

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:
Public domain data from the U.S. government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of this data set.

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

    Uri ten Brink
    U.S. Geological Survey
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1589
    USA

    (508) 548-8700 x2396 (voice)
    (508) 457-2310 (FAX)
    utenbrink@usgs.gov

    Hours_of_Service: 8AM to 5PM; M-F
  2. What's the catalog number I need to order this data set?

    Downloadable Data: Open-File Report 2005-1066 - ctd_02

  3. What legal disclaimers am I supposed to read?

    Although these data sets are used by the National Oceanic and Atmospheric Administration (NOAA) and the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by NOAA or the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA or the USGS in the use of these data.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    The data is available in Environmental Systems Research Institute, Inc. (ESRI) shapefile format. The user must have ArcView 3.+ or ArcGIS 8.+ to read and process the data file. In lieu of ArcView/ArcGIS, the user may utilize another GIS application package capable of importing data.

Who wrote the metadata?

Dates:
Last modified: 04-May-2005
Last Reviewed: 25-Aug-2005
Metadata author:
Glynn Williams
U.S. Geological Survey
Information Technician (Geo/GIS)
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2290 (voice)
(508) 457-2310 (FAX)
gwilliams@.usgs.gov

Hours_of_Service: 8:00AM to 5:00PM; M-F
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.6 on Fri Aug 26 14:42:33 2005