geo_150m_nw - Shaded Relief (illuminated from NW) of Puerto Rico Trench Bathymetry, Geographic Coordinate System

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Frequently-anticipated questions:

What does this data set describe?

Title:
geo_150m_nw - Shaded Relief (illuminated from NW) of Puerto Rico Trench Bathymetry, Geographic Coordinate System
Abstract:
The Puerto Rico Trench is a tectonic plate boundary where the North American Plate slides by and descends under the Caribbean Plate. Although much of the trench lies within the United States of America's Exclusive Economic Zone (EEZ), surprisingly few surveys have been conducted there during the past 25 years. This data set is a grey toned surface model image product derived from a process using multibeam bathymetry and acoustic-backscatter imagery data collected during the U.S. Geological Survey (USGS) science cruise 02051 in collaboration with the National Oceanic and Atmospheric Administration (NOAA) Research Cruise RB0208 from 24 September to 30 September 2002, Leg I of III. (Leg II and III: 20030218 to 20030407 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), 2005, geo_150m_nw - Shaded Relief (illuminated from NW) of Puerto Rico Trench Bathymetry, Geographic Coordinate System: 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 , Worley, Chuck, Smith, Lt. Shep , 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: -67.742713
    East_Bounding_Coordinate: -65.490414
    North_Bounding_Coordinate: 20.294580
    South_Bounding_Coordinate: 18.671243

  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: remote-sensing image

  6. How does the data set represent geographic features?

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

      This is a Raster data set. It contains the following raster data types:

      • Dimensions 1198 x 1567 x 1, type Pixel

    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 0.000010. Longitudes are given to the nearest 0.000010. 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?

    Band_1

    ObjectID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Value
    DN value

    Range of values
    Minimum:0
    Maximum:255
    Units:1

    Red

    Green

    Blue

    Entity_and_Attribute_Overview: There are no attributes associated with the GEOTIFF image.

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-Tech/GIS)
    384 Woods Hole Road
    Woods Hole Road, MA 02543-1598
    USA

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

    Hours_of_Service: 8:00AM to 5:00PM

Why was the data set created?

This multibeam bathymetric image can be used in Geographic Information Science (GIS) to provide better perspective viewing and advanced analysis of geologic conditions in the Puerto Rico Trench. Remotely sensed features in the trench are studied and the information learned can be used to discern cause and effect of natural hazards such as earthquakes and tsunamis.

How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 4)
    The processing of data from multibeam bathymetry and acoustic backscatter started with the collection of raw data imagery that were converted using Caris 5.3 Hips Sips software. The continued processing of data entailed reviewing and editing it with Caris Swath Edit, followed with Caris Sub Set mode editing. Both editing processes allowed the hydrographer to eliminate data points that were considered artifacts or out of context with the immediate benthic area. After editing, the weighted mean grid was re-generated with a grid resolution (s) from 300 to 30 meters.

    Person who carried out this activity:

    Lt. Shep Smith
    NOAA/OMAO
    Hydrographer
    1315 East West Highway
    Silver Springs, MD 20910
    USA

    301-713-3431 x171 (voice)

    (process 2 of 4)
    This image was created from a weighted mean grid, referred to in process step one, regenerated to 150 meter grid resolution (NW sun illumination) using available on-board research vessel image processing tools.

    Person who carried out this activity:

    Lt Shep Smith
    NOAA/OMAO
    Hydrographer
    1315 East West Highway
    Silver Springs, Maryland 20910
    USA

    301-713-3431 x171 (voice)

    Date: 2005 (process 3 of 4)
    This imagery was re-projected from UTM Zone 19 to a geographic coordinate system with a WGS84 Datum.

    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
    Data sources used in this process:
    • 150m_nw

    Data sources produced in this process:

    • geo_150m_nw

    Date: 2005 (process 4 of 4)
    The palette tool color mode menu, was optioned to maintain a lustrous background for the image. This type of background allows an option for transparency available in most GIS applications; when enough sheer was provided for geospatial object placement in respective coordinate positions, relational perspective views are available for useful GIS modeling of various data collected during the Puerto Rico trench science survey.

    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 5:00PM; 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?

  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 attributions. This data set is not to be use for navigation purpose (s).

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

    Downloadable Data

  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?

    This image is available as a GEOTIFF image with an accompanying world file. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image.

Who wrote the metadata?

Dates:
Last modified: 10-May-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 Thu Sep 01 09:56:24 2005