gtsurfmod.tif - Grey Toned Surface Model Image from the 150 meter grid of the Puerto Rico Trench

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Frequently-anticipated questions:

What does this data set describe?

Title:
gtsurfmod.tif - Grey Toned Surface Model Image from the 150 meter grid of the Puerto Rico Trench
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 mosaic derived from the 150 meter grid made from the multibeam bathymetric data collected during the U.S. Geological Survey (USGS) science cruise 03008 in collaboration with National Oceanic and Atmospheric Administration (NOAA) 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, gtsurfmod.tif - Grey Toned Surface Model Image from the 150 meter grid of the Puerto Rico Trench: 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:
    Puerto Rico Trench Project Probes Legs I and III: 24 September - 30 September, 2002; and 28 August - 4 September, 2003, respectively relative to Leg II.
    This is part of the following larger work.

    Brink, Uri ten , Parker, Castle Eugene , Danforth, William, Polloni, Chris, 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:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -68.9
    East_Bounding_Coordinate: -62.6
    North_Bounding_Coordinate: 20.3
    South_Bounding_Coordinate: 18.7

  3. What does it look like?

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

    Calendar_Date: 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 vector data types (SDTS terminology):

      • String (80)

    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 6378137.0.
      The flattening of the ellipsoid used is 1/298.25722356300003.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Depth_System_Definition:

  7. How does the data set describe geographic features?

    Band_1
    grey scale image with sun illumination image stored in TIFF format (Source: ESRI)

    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

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?

    Chris Polloni
    U.S. Geological Survey
    Spatial Data Technician
    384 Woods Hole Road
    Woods Hole Road, MA 02543-1598
    USA

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

    Hours_of_Service: 8:00AM to 5:00PM

Why was the data set created?

This high-resolution multibeam bathymetry image mosaic 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?

    SeaBeam (source 1 of 2)
    , Unpublished Material, SeaBeam MB41 raw data files.

    Type_of_Source_Media: disc
    Source_Contribution:
    The raw data files were processed to create a bathymetric mosaic

    (source 2 of 2)

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

    (process 1 of 3)
    The data pipeline included transferring the SeaBeam MB41 raw data files from the SGI computer to a processing laptop via file transfer protocol (FTP). The raw files were converted using Caris 5.3 Hips Sips software. The processing crew maintained the same processing procedures as employed by NOAA hydrographic field units. Once the data was converted, a Digital Terrain Model was generated for visual detection of artifacts and missed depths. The next step entailed reviewing and editing the data 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 mead grid was re-generated with a grid resolution of 150 meters. A grey scale by depth with sun illumination model at elevation 45 and azimuth 45 was exported as a tif image with an associated world file.

    Person who carried out this activity:

    Castle E. Parker
    NOAA/EASC
    Hydrographer
    439 West York Street
    Norfolk, Virginia 23510
    USA

    757-441-6746 (voice)
    757-441-6601 (FAX)
    castle.e.parker@noaa.gov

    Date: 2004 (process 2 of 3)
    Renamed the image file from PRT03_150interp_gy4545.tif to gtsurfmod.tif with associated world file.

    Person who carried out this activity:

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

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

    Hours_of_Service: 9AM to 5PM; M- F
    Data sources used in this process:
    • PRT03_150interp_gy4545.tif

    Data sources produced in this process:

    • gtsurfmod.tif

    (process 3 of 3)
    This image's coordinate system was re-assigned from a UTM Zone 19, NAD83 to a Geographic, Geodetic Model: WGS84 using Blue Marble's Geographic Transformer (Version 5.1).

    Person who carried out this activity:

    Glynn Williams
    U.S. Geological Survey
    Spatial Analyst
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Hours_of_Service: 8:00AM to 4:30PM; M-F
    Data sources used in this process:
    • gtsurfmod.tif

    Data sources produced in this process:

    • gtsurfmod.tif

  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 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 (USGS) and National Oceanic and Atmospheric Administration (NOAA) 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, 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: Open-File Report 2004-1400:grey scale

  3. What legal disclaimers am I supposed to read?

    Although this dataset has been 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 or related materials.

  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 user may want a program capable of converting or processing "geotiff" images.

Who wrote the metadata?

Dates:
Last modified: 02-Nov-2004
Metadata author:
Glynn Williams
U.S. Geological Survey
Spatial Data Technician
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 2.8.18 on Fri Dec 17 16:01:23 2004