NOAA TIFF Image: St. Croix (Buck Island), 2006, 10m Multibeam Bathymetry (Sun Illuminated Azimuth 45), US Virgin Islands, Project NF-06-03, UTM 20 NAD83

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Frequently anticipated questions:


What does this data set describe?

Title:
NOAA TIFF Image: St. Croix (Buck Island), 2006, 10m Multibeam Bathymetry (Sun Illuminated Azimuth 45), US Virgin Islands, Project NF-06-03, UTM 20 NAD83
Abstract:
This georeferenced RGB image represents 10 meter resolution bathymetry of the north shore of St. Croix, US Virgin Islands. This image is also vertically exaggerated by a factor of 1, and sun illuminated where the azimuth equals 45 degrees and angle equals 40 degrees.

NOAA's NOS/NCCOS/CCMA Biogeography Team, in collaboration with NOAA vessel Nancy Foster and territory, federal, and private sector partners, acquired multibeam bathymetry data in the US Virgin Islands and Puerto Rico from 3/21/06 to 4/2/06. Data was acquired with a hull-mounted Kongsberg Simrad EM 1002 multibeam echosounder (95 kHz) and processed by a NOAA contractor using CARIS HIPS software. Data has all correctors applied (attitude, sound velocity) and has been reduced to mean lower low water (MLLW) using final approved tides and zoning from NOAA COOPS. Data is in UTM zone 20 north, datum NAD83. The processed CARIS data was used to generate a CARIS BASE image surface based on swath angle.

The project was conducted to meet IHO Order 1 and 2 accuracy standards, dependant on the project area and depth. All users should individually evaluate the suitability of this data according to their own needs and standards.

Supplemental_Information:
Depth datum is mean lower low water, units are meters and encoding method is explicit depth coordinate included with horizontal coordinates. Vertical Coordinate System information may be found in the Data Acquisition and Processing Report (DAPR) for cruise number NF-06-03 at <http://ccma.nos.noaa.gov/products/biogeography/usvi_nps/pdf/NF-06-03%20DAPR.pdf>
  1. How should this data set be cited?

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, 200603, NOAA TIFF Image: St. Croix (Buck Island), 2006, 10m Multibeam Bathymetry (Sun Illuminated Azimuth 45), US Virgin Islands, Project NF-06-03, UTM 20 NAD83: NOAA's National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Silver Spring, MD.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -64.784575
    East_Bounding_Coordinate: -64.447671
    North_Bounding_Coordinate: 17.837426
    South_Bounding_Coordinate: 17.761327

  3. What does it look like?

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

    Beginning_Date: 21-Mar-2006
    Ending_Date: 02-Apr-2006
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: raster digital data

  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 1623 x 7130 x 1, type Grid Cell

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 20
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -63.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using Row and Column
      Abscissae (x-coordinates) are specified to the nearest 5.000000
      Ordinates (y-coordinates) are specified to the nearest 5.000000
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

  7. How does the data set describe geographic features?


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?

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program

    NOAA - NMAO personnel and R/V NANCY FOSTER

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

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
    Project Manager - US Virgin Islands
    1305 East West Highway, SSMC4
    Silver Spring, MD 20910
    USA

    (301) 713-3028 (voice)
    (301) 713-4388 (FAX)

    Contact_Instructions:
    Contact info is for CCMA general reception. Please ask for current Biogeography project manager for USVI.


Why was the data set created?

This multibeam data was collected as IOCM (Integrated Ocean and Coastal Mapping) project NF-06-03 during the third year of an ongoing NOAA scientific research mission in the US Caribbean to characterize midwater and deep water coral reef habitats at depths of up to 1,000 meters. The mission purpose is to better understand the resources within the surveyed reef habitats, and ultimately develop species utilization models linking physical habitats with biological information. The multibeam backscatter, multibeam bathymetry, and ground truth video footage collected during the 2006 mission will be used internally to characterize sea floor topography and to create benthic habitat maps, helping NOAA meet its mapping commitment to the US Coral Reef Task Force. The resulting publicly-distributed data is also a contribution to the greater scientific community interested in the USVI seafloor.


How was the data set created?

  1. From what previous works were the data drawn?

    Raw Multibeam Data NF-06-03 (source 1 of 4)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, Unpublished Material, Raw Multibeam Data NF-06-03.

    Type_of_Source_Media: external hard drive
    Source_Contribution: Original raw full resolution dataset.

    NF-06-03 HDCS Processed Multibeam Data (source 2 of 4)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, Unpublished Material, NF-06-03 HDCS Processed Multibeam Data.

    Type_of_Source_Media: external hard drive
    Source_Contribution:
    Processed, cleaned, and corrected full resolution dataset. Sourced from raw GSF data.

    NF-06-03 BASE Surface (source 3 of 4)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, Unpublished Material, NF-06-03 CARIS BASE Surface.

    Type_of_Source_Media: external hard drive
    Source_Contribution:
    Downsampled CARIS BASE (Bathymetry Associated with Statistical Error) grid with best depth layer. Sourced from processed HDCS data.

    NF-06-03 ASCII XYZ Multibeam Data (source 4 of 4)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, 200603, NOAA XYZ Text File of 10m Multibeam Bathymetry of St. Croix (Buck Island), US Virgin Islands, Project NF-06-03, 2006, UTM 20N NAD83.

    Online Links:

    Type_of_Source_Media: external hard drive
    Source_Contribution:
    Downsampled ASCII text file containing XYZ values. XYZ equals northing, easting, and depth in meters. Sourced from CARIS BASE surface.

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

    Date: 2006 (process 1 of 3)
    For this project, the Chief Scientist was NOAA/NOS/NCCOS/CCMA's Tim Battista and the Lead Hydrographer was independent contractor Jay Lazar. Data was collected aboard the NOAA ship Nancy Foster from 3/21/06 to 4/2/06. Multibeam data was acquired in Simrad .all format with a hull-mounted Kongsberg Simrad EM 1002 multibeam echosounder (95 kHz). Backscatter snippet collection was enabled. Line spacing for acquisition was three times the water depth, and data was retained out to 45 to 60 degrees from nadir, depending on project area. Heave, roll, pitch and heading correctors were collected using an Applanix POS/MV Model 320 inertial measurement unit (IMU) and associated Trimble GPS antennas. Sound velocity profiles were acquired with a Seabird Electronics SeaCat SBE19P CTD profiler and processed using Seabird Seaterm software, then applied directly to the raw data. Positioning was obtained using Northstar 941X GPS receivers with differential correctors from U.S. Coast Guard CORS beacon Isabel, Puerto Rico. Data was reduced to Mean Lower-Low Water (MLLW) using final approved tides from NOAA COOPS, based on National Water Level Observation Network (NWLON).

    Data sources used in this process:

    • NF-06-03 HDCS Multibeam Data

    Date: 2006 (process 2 of 3)
    Raw Simrad (.all format) were converted and processed using CARIS HIPS v6.0 software, resulting in a CARIS HDCS format dataset with all correctors applied. Attitude and SWMB data was cleaned of fliers, and SWMB data was reviewed in subset mode by a NOAA contractor.

    Data sources used in this process:

    • NF-06-03 HDCS Multibeam Data

    Date: 2006 (process 3 of 3)
    After being submitted to CCMA by the contractor, CARIS HIPS v6.0 was used to generate a CARIS BASE surface (similar to a DTM), based on weighted swath angle, from the processed HDCS data. Then CARIS export tool "BASE Surface to Image" was used to export a 8 bit geotif in the coordinate system NAD83 UTM zone 20N.

    Data sources used in this process:

    • NF-06-03 BASE Surface

  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?

    See Data Acquisition and Processing Report (DAPR) NF-06-03.

  3. How accurate are the heights or depths?

    See Data Acquisition and Processing Report (DAPR) NF-06-03.

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

    This ESRI Grid is sourced from a gridded dataset. The original full-resolution multibeam data was used to create a downsampled uniform-resolution CARIS BASE (Bathymetry Associated with Statistical Error) surface grid with a best depth component. The downsampled grid nodes from that depth surface were then exported and used to generate the ESRI Grid. Some positional shifts may have occurred between the original data points and the transformed grid.

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

    While the project was conducted to meet IHO Order 1 and 2 accuracy standards, dependant on project area and depth, all users should independently analyze the dataset according to their own needs and standards to determine data usability.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: Please cite any use of this data.
Use_Constraints:
Note: NOT TO BE USED FOR NAVIGATION.

These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA 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 in the use of these data or related materials.

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

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
    Project Manager - US Virgin Islands
    1305 East West Highway, SSMC4
    Silver Spring, MD 20910
    USA

    (301) 713-3028 (voice)
    (301) 713-4388 (FAX)

    Contact_Instructions:
    Contact info is for CCMA general reception. Please ask for current Biogeography project manager for USVI.
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA 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 in the use of these data or related materials.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 20-Dec-2012
Metadata author:
NOAA/NOS/NCCOS/CCMA Biogeography
Attn: Project Manager
1305 East West Highway, SSMC4
Silver Spring, MD 20910
USA

(301) 713-3028 (voice)

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


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