Multibeam Mapping Survey Oculina Banks 2005

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Frequently anticipated questions:


What does this data set describe?

Title: Multibeam Mapping Survey Oculina Banks 2005
Abstract:
The National Oceanographic and Atmospheric Administration's (NOAA) Undersea Research Center at the University of North Carolina at Wilmington (NURC/UNCW) coordinated an acoustic survey in portions of the Oculina Habitat Area of Particular Concern from June 14-19, 2005. This metadata record is the parent record for this multi-beam echosounder (MBES) survey, which includes the following products: 1) bathymetric grid, 2) XYZ ascii table created from the grid, 3) colored coded shaded geotiffs from the grid, 4) backscatter mosaic, 5) XYA (amplitude) ascii table created from the mosaic, and 6) geotif of backscatter draped on the bathymetric grid. All products are available through an on-line Oculina Geographic Information system (www.uncw.edu/oculina) and on an OGIS CD. Some data sets are also posted on NOAA's Coral Reef Information System (CoRIS) at www.coris.noaa.gov. Another product that will not be distributed, but will be used as input to habitat classification software (QTC MultiView (website)), are raw data files logged to disk using the the Simrad EM3002 MBES data acquisition software. These raw files contain packets of information (depth soundings, navigation, attitude, sound velocity profiles, UTC time) that the acquisition software logged sequentially in time. The raw data format is available from Kongsberg-Simrad (website). The MBES system was provided by Seafloor Systems Inc. and the support vessel was UNCW's 70-ft. R/V Cape Fear.

This survey is part of an on-going partnership effort funded by the NOAA Coral Reef Conservation Program (CRCP). This survey was funded by a CRCP grant to Andrew David, NOAA Fisheries - Panama City, and Andrew Shepard, NURC/UNCW. In addition to partners above, other partners include UNCW's Spatial Analysis Lab, US Geological Survey, and the S. Atlantic fishery Management Council.

Supplemental_Information:
The survey was supported by Seafloor Systems, Inc., Portland, (www.seafloorsystems.com) Oregon using a Simrad EM 3002 multi-beam system. The survey was funded by NOAA Fisheries (www.sefsc.noaa.gov) and overseen by the NOAA Undersea Research Center at UNCW (www.uncw.edu/nurc).
  1. How should this data set be cited?

    University of North Carolina at Wilmington, 20050630, Multibeam Mapping Survey Oculina Banks 2005: NOAA Undersea Research Center at UNCW, Wilmington, NC.

    Online Links:

    This is part of the following larger work.

    University of North Carolina at Wilmington, 2002, Oculina Banks Mapping the Oculina Banks Marine Protected Area: National Undersea Research Center at UNCW, Wilmington, NC.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -80.0000
    East_Bounding_Coordinate: -79.0000
    North_Bounding_Coordinate: 29.0000
    South_Bounding_Coordinate: 28.0000

  3. What does it look like?

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

    Beginning_Date: 15-Jun-2005
    Ending_Date: 20-Jun-2005
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: Map or XYZ ASCII

  6. How does the data set represent geographic features?

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

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

      • Point

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 17
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -81.000000
      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 3.0
      Ordinates (y-coordinates) are specified to the nearest 3.0
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is WGS 1984.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    XYZ ASCII file is a 3-column table of longitude, latitude and elevation. Each point is average center of 3 meter square grid cell. Colored, shaded geotif maps in OGIS were created using these points and CARIS HIPS 5.4 software.
    Entity_and_Attribute_Detail_Citation: none


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?

    NOAA Undersea Research Center at UNCW
    Attn: Andrew N. Shepard
    Director, NURC
    NURC/UNCW, 5600 Marvin Moss Ln
    Wilmington, North Carolina 28409
    USA

    910-962-2446 (voice)
    910-962-2444 (FAX)
    sheparda@uncw.edu

    Hours_of_Service: Mon-Fri, 8 am -5 pm


Why was the data set created?

The 2005 multi-beam survey provides the highest resolution bathymetric map ever acoustically recorded in the OHAPC. Survey products will be used for several purposes including: 1) construction of a habitat map and 2) to accurately position past and future sampling and underwater observations (e.g., grab samples, ROV transects, and submersible dives.


How was the data set created?

  1. From what previous works were the data drawn?

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

    Date: 20-Jun-2005 (process 1 of 1)
    The bathymetry and backscatter data were collected along a continuous swath perpendicular to the direction of the ship using a Simrad EM 3002 multibeam sonar system. The data were collected in the raw format .all Simrad file. The data are cleaned of bad navigation and depth readings in CARIS HIPS 5.4 swath editor. The depth readings are gridded into a common grid. The gridded data are converted to an XYZ ASCII format file (Longitude, Latitude, Attribute). The raw backscatter was saved during the survey.

    The multi-beam system was mated to a Differential GPS unit, APPLANIX POS/MV (quantified heave, pitch, roll, and yaw heading). HYPACK navigation system was used to maintain vessel course throughout the survey. Sensor data were compiled in SIS Shipboard Data Acquisition and Image Processing System and initially logged to .all Simrad data files. Files were post-processed using CARIS HIPS 5.4 software to remove outliers, correct for sound velocity and tidal stage. HIPS was also used to mosaic backscatter and produce XYA files.

    Person who carried out this activity:

    John Tamplin
    Seafloor Systems, Inc.
    President
    2038 NW Aloclek Drive, Suite 218
    Hillsboro, Oregon 97124
    USA

    503-466-2382 (voice)
    503-466-2892 (FAX)
    info@seafloorsystems.com

    Hours_of_Service: Mon-Fri, 9 am -5 pm (PT)
  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?

    None

  2. How accurate are the geographic locations?

    1 meter

  3. How accurate are the heights or depths?

    0.05% of water depth

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

    The initial surveys produced an extremely large dataset (62 CDs) of raw data in Caris' cross-track format. To create the geotifs presented in the OGIS, this data set was reduced by post-survey processing including: corrections for sound velocity and tidal stage, removal of outliers and data gaps, and calculation and assignment of mean values for 3m X 3m cells throughout the survey area.

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

    Data are believed to be logically consistent, though no tests were performed.


How can someone get a copy of the data set?

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

Access_Constraints:
There are no constraints for use of geotif files included on the OGIS CD, which is available from the P.O.C.
Use_Constraints: Not for legal use

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

    NOAA Undersea Research Center at UNCW
    Attn: Andrew N. Shepard
    Director, NURC
    NURC/UNCW, 5600 Marvin Moss Ln
    Wilmington, North Carolina 28409
    USA

    910-962-2446 (voice)
    910-962-2444 (FAX)
    sheparda@uncw.edu

    Hours_of_Service: Mon-Fri, 8 am -5 pm
  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 not intended for navigational purposes.

    NOAA makes no warranty regarding these data,expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA does not assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

    Although these data have been used by NOAA, these data and information are provided with the understanding that they are not guaranteed to be useable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of such data and information are the sole responsibility of the user. Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.

    Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by UNCW, NOAA, the US Department of Commerce, or the U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 20-Dec-2012
Metadata author:
NOAA Undersea Research Center at UNCW
Attn: Andrew N. Shepard
Director, NURC
NURC/UNCW, 5600 Marvin Moss Ln
Wilmington, North Carolina 28409
USA

910-962-2446 (voice)
910-962-2444 (FAX)
sheparda@uncw.edu

Hours_of_Service: Mon-Fri, 8 am -5 pm
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.13 on Thu Sep 18 10:41:13 2014