February 2007 Multibeam Mapping of Pulley Ridge, southwest Florida

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Frequently anticipated questions:

What does this data set describe?

February 2007 Multibeam Mapping of Pulley Ridge, southwest Florida
This disk or set of disks contain high-resolution multibeam and backscatter maps of the Pulley Ridge Area, near the Tortugas, in the Gulf of Mexico. It includes the following products: 1) Text file containing X, Y, Z postprocessed bathymetry data, 2) Text file containing X, Y, I (Intensity) postprocessed backscatter data, 3) Geotiff and JPEG images of bathymetry, 4) GeoTiff and JPEG images of backscatter, and 5) Fledermaus files of the survey locations. All products are available contacting the distributor. 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), are raw data files logged to disk using the Simrad EM3000 multibeam system 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. The multibeam system was provided by University of South Florida, College of Marine Science and the support vessel was the Florida Institute of Oceanography R/V Suncoaster.
The survey was supported by University of South Florida, College of Marine Science, in St. Petersburg, FL, (www.marine.usf.edu) using a Simrad EM 3000 multi-beam system. The survey was funded by NOAA Fisheries (www.sefsc.noaa.gov).

Note on Bounding Box: Survey area was irregular in shape, the entire area within the corners was not mapped

  1. How should this data set be cited?

    NOAA Fisheries - Panama City Laboratory, Chief Scientist (Andy David), 20070225, February 2007 Multibeam Mapping of Pulley Ridge, southwest Florida: NOAA Fisheries Laboratory in Panama City, FL, Panama City, FL.

    Online Links:

    This is part of the following larger work.

    Fisheries, NOAA, 20060728, Multibeam Mapping of Pulley Ridge: NOAA Fisheries - Panama City Laboratory, Panama City, FL.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.05045
    East_Bounding_Coordinate: -83.43133
    North_Bounding_Coordinate: 26.91650
    South_Bounding_Coordinate: 24.96985

  3. What does it look like?

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

    Beginning_Date: 21-Feb-2007
    Ending_Date: 25-Feb-2007
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: Map

  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?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00002. Longitudes are given to the nearest 0.00002. Latitude and longitude values are specified in Decimal Degrees.

      The horizontal datum used is WGS84.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.25722356300.

  7. How does the data set describe geographic features?

    Sample of bathymetry XYZ ASCII file

    latitude longitude positive depth 24.96984 -83.60909 72.682953 24.96984 -83.60897 73.403999 24.96986 -83.60945 72.704002

    northings eastings positive depth 236594.42000 2764141.08000 72.682953 236606.24000 2764141.08000 73.403999 236558.24000 2764144.08000 72.704002

    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 Fisheries - Panama City Laboratory
    Attn: Andrew W. David
    Research Fishery Biologist
    3500 Delwood Beach Rd
    Panama City, Florida 32408

    850-234-6541 (voice)
    850-235-3559 (FAX)

    Hours_of_Service: Mon-Fri, 8 am - 4 pm CDT

Why was the data set created?

The primary objective of this mapping expedition is to gather data on the location of coral formations present in the Pulley Ridge Area, which lies off southwest Florida and is the deepest hermatypic coral reef in the continental US. This area also hosts productive fisheries for shrimp and reef fish. The Gulf of Mexico Fishery Management Council is concerned about certain fishing activities ocurring in the area, such as bottom long-lines and trawling, which maybe damaging the corals. For this reason, the GMFMC has designated Pulley Ridge as a Habitat Area of Particular Concern (HAPC). Further protections are likely to be approved, but the GMFMC requires more data on the nature and extent of coral formations to make a more informed decision. Continued multibeam mapping is a very cost effective way of gathering this information and preventing damage to this valuable area.

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: 25-Feb-2007 (process 1 of 1)
    The bathymetry data were collected along a continuous swath perpendicular to the direction of the ship using a Kongsberg Simrad EM3000 (300 kHz) multibeam sonar system. The data are cleaned of bad navigation and depth soundings. The depth soundings are gridded into a common grid. The gridded data are converted to an XYZ ASCII format file (Longitude, Latitude, Depth in Meters).

    Person who carried out this activity:

    Brian Donahue
    University of South Florida, College of Marine Science
    Marine Technician / Research Assistant
    140 7th Avenue South
    St. Petersburg, Florida 33701-5016

    (727) 553 1121 (voice)
    (727) 553 1189 (FAX)

  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?

    0.5 - 2 meters

  3. How accurate are the heights or depths?

    0.5 - 2 meters

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


  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: None
Use_Constraints: Not for legal use

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

    NOAA Fisheries - Panama City laboratory
    Attn: Marta M. Ribera
    Research Fishery Biologist
    3500 Delwood Beach Rd
    Panama City, Florida 32408

    850-234-6541 (voice)
    850-235-3559 (FAX)

    Hours_of_Service: Mon-Fri, 8 am - 4 pm CDT
  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 are 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 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?

Last modified: 07-Apr-2017
Last Reviewed: 28-May-2009
Metadata author:
NOAA Fisheries - Panama City laboratory
Attn: Marta M. Ribera
Research Fishery Biologist
3500 Delwood Beach Rd
Panama City, Florida 32408

850-234-6541 (voice)
850-235-3559 (FAX)

Hours_of_Service: Mon-Fri, 8 am - 4 pm CDT
Metadata standard:

Generated by mp version 2.9.13 on Mon Oct 23 09:42:35 2017