ctd - Oceanographic Data Device Location for Joint USGS Cruise 03008 and NOAA RB0303

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  2. How accurate are the geographic locations?
  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 data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title:

ctd - Oceanographic Data Device Location for Joint USGS Cruise 03008 and NOAA RB0303

Abstract:

This data set shows the location where a CTD (Conductivity -Temperature - Depth) device was used. CTD were determined while in the Caribbean Sea. The point location attributes are longitude, latitude, and date of placement in the water; this information was acquired during the U.S. Geological Survey Science Cruise 03008 in collaboration with National Oceanic and Atmospheric Administration Research Cruise RB0303 from 18 February to 7 March 2003, Leg II of III. (Leg I and III: 20020924 to 20020930 and 20030828 to 20030904, respectively).

1. How should this data set be cited?

   National Oceanic and Atmospheric Administration (NOAA), and U.S. Geological Survey (USGS), 2004, ctd - Oceanographic Data Device Location for Joint USGS Cruise 03008 and NOAA RB0303: Open-File Report 2004-1400, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

   Online Links:

   • <http://pubs.usgs.gov/of/2004/1400/data/oceanography/ctd/ctd.zip>

   This is part of the following larger work.

   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:

   • <http://pubs.usgs.gov/of/2004/1400>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -68.091670

   East_Bounding_Coordinate: -68.091670

   North_Bounding_Coordinate: 19.009730

   South_Bounding_Coordinate: 19.009730

3. What does it look like?

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

   Beginning_Date: 17-Feb-2003

   Ending_Date: 07-Mar-2003

   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

   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 character string or numeric value associated with a particular object. (Source: ESRI)

   LATITUDE

   The north/south geographic coordinate reference point (location) where the CTD device was placed in water. (Source: NOAA shipboard technician)

   LONGITUDE

   The east/west geographic coordinate reference point (location) where the CTD device was placed in water. (Source: NOAA shipboard technician)

   WAYPTS

   Name assigned to designate CTD cast start location (Source: User defined)

   Value	Definition
   CTD	CTD (Conductivity - Temperature - Depth) device

   DATE

   The recorded date by month, day, and year, mm:dd:yyyy, when the device/equipment was lowered into the water (Source: User defined)

   Character string in the format of mm/dd/yyyy

   TIME

   The recorded time by hour:minute:second, hh:mm:ss, when the device/equipment was lowered into the water (Source: User defined)

   Character string in the format of hh:mm:ss

   Entity_and_Attribute_Overview:

   This is an ArcView table that shows attribute information of longitude, latitude, and date that this CTD device was temporarily placed at a location.

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • National Oceanic and Atmospheric Administration (NOAA)
   • U.S. Geological Survey (USGS)

2. Who also contributed to the data set?

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

   Chris Polloni
   U.S. Geological Survey
   Information Specialist
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 x2280 (voice)
   (508) 457-2310 (FAX)
   cpolloni@usgs.gov
   

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

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

1. From what previous works were the data drawn?

   (source 1 of 1)

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

   Date: 2004 (process 1 of 3)

   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:
   

   U.S. Geological Survey
   c/o Chris Polloni
   Information Specialist
   384 Woods Hole Road
   Woods Hole, Massachusetts 02543-1589
   USA
   

   (508) 548-8700 x2280 (voice)
   (508) 457-2310 (FAX)
   cpolloni@usgs.gov
   

   Hours_of_Service: 8AM to 5PM; M-F

   Date: 2004 (process 2 of 3)

   The CTD spreadsheet file was reformatted as table input file for ArcView.

   Person who carried out this activity:
   

   Chris Polloni
   U.S. Geological Survey
   Information Specialist
   384 Woods Hole Road
   Woods Hole, Massachusetts 02543-1589
   USA
   

   508-457-2280 (voice)
   (508) 457-2310 (FAX)
   cpolloni@usgs.gov
   

   Date: 2004 (process 3 of 3)

   CTD table location file saved as ArcView shapefile. ArcView 3.2 used to process shapefile.

   Person who carried out this activity:
   

   Chris Polloni
   U.S. Geological Survey
   Information Specialist
   384 Woods Hole Road
   Woods Hole, Massachusetts 02543-1589
   USA
   

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

   Hours_of_Service: 8AM to 5PM; M-F

   Data sources produced in this process:

   • ctd.dbf
   • ctd.shp
   • ctd.shx

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

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?

   complete

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

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 (USGS) as the source of this information.

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, Massachusetts 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 2004-1400 - ctd

3. What legal disclaimers am I supposed to read?

   Although this dataset has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by 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 the USGS in the use of these data or related materials.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	The six files (ctd.dbf, ctd.prj, ctd.shp, ctd.shx, ctd_metadata.txt, and ctd.xml) in format ArcView shapefile (version 3.2) ESRI polygon shapefile Size: 7
     Media you can order:	DVD-ROM (Density 4,700 Mbyte) (format UDF) Note: The user must have a computer system with a DVD-ROM available. To browse the information contained on this CD-ROM, the user must have a current WWW browser available. The user must also have software installed on their computer to unzip the archived file.

   • Cost to order the data: none

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

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

Dates:

Last modified: 02-Nov-2004

Metadata author:

Glynn Williams
U.S. Geological Survey
Spatial Data Technician
384 Woods Hole Road
Woods Hole, Massachusetts 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:

• <http://www.esri.com/metadata/esriprof80.html>
• <http://www.esri.com/metadata/esriprof80.html>