2010 Cape Canaveral, Florida Single-beam Bathymetry Data

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Frequently anticipated questions:

What does this data set describe?

Title: 2010 Cape Canaveral, Florida Single-beam Bathymetry Data
Abstract:
Single-beam bathymetric surveys were conducted on July 27-29, 2010 along 37 cross-shore transects offshore from Cape Canaveral, Fla. The transects were spaced 500 meters (m) apart in the alongshore direction and each was approximately five kilometers (km) long in the cross-shore.
  1. How might this data set be cited?
    Thompson, David M., Plant, Nathaniel G., Hansen, Mark E., Doran, Kara S., DeWitt, Nancy T., and Schreppel, Heather A., 20150715, 2010 Cape Canaveral, Florida Single-beam Bathymetry Data.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -80.642078
    East_Bounding_Coordinate: -80.466972
    North_Bounding_Coordinate: 28.695794
    South_Bounding_Coordinate: 28.408834
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 27-Jul-2010
    Ending_Date: 29-Jul-2010
    Currentness_Reference:
    Ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: tabular digital data
  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):
      • Entity Point (524840)
    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 0.062639. Longitudes are given to the nearest 0.067386. 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 1/298.257223563.
  7. How does the data set describe geographic features?
    canaveral_single_beam_2010.txt
    points (Source: single-beam survey points)
    Longitude
    Longitude of bathymetry position in decimal degrees (Source: USGS)
    Range of values
    Minimum:-80.642078
    Maximum:-80.466972
    Latitude
    Latitude of bathymetry position in decimal degrees (Source: USGS)
    Range of values
    Minimum:28.408834
    Maximum:28.695794
    Elevation
    Elevation of bathymetry in meters NAVD88 (Source: USGS)
    Range of values
    Minimum:-15.268
    Maximum:-1.167
    Units:meters

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • David M. Thompson
    • Nathaniel G. Plant
    • Mark E. Hansen
    • Kara S. Doran
    • Nancy T. DeWitt
    • Heather A. Schreppel
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey
    Attn: David M. Thompson
    600 4th Street South
    Saint Petersburg, FL
    UNITED STATES

    727-502-8079 (voice)
    727-502-8001 (FAX)
    dthompson@usgs.gov

Why was the data set created?

To update bathymetry for a bathymetric change analysis and a numerical wave modeling effort. Data were collected during USGS field activity number (FAN) 10CBS01 and was supported by funding from NASA's Kennedy Space Center under agreement NNK09CB7I; additional survey details are available at http://cmgds.marine.usgs.gov/fan_info.php?fan=10CBS01. This dataset, canaveral_single_beam_2010.txt, is included in a USGS Data Release that can be accessed online at https://doi.org/10.5066/F75Q4T4N

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: 29-Jul-2010 (process 1 of 5)
    GPS acquisition: A GPS base station was erected within 20 km of the survey area on a pre-existing National Geodetic Survey (NGS) benchmark ("WARD") at Cape Canaveral, Fla. GPS data at the base station were recorded using an Ashtech Z-Xtreme GPS receiver that recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from the satellites via the Dorne/Margolin choke-ring antenna. GPS data on the boat (rover), a 21 foot Predator, were also recorded with an Ashtech Z-Xtreme GPS receiver but with an Ashtech geodetic survey antenna. Both the base and rover recorded positions at one Hertz (Hz).
    Date: 24-Aug-2010 (process 2 of 5)
    GPS processing: All static base station sessions were run through On-Line Positioning User Service (OPUS) maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS were put in a spreadsheet to compute final values and error analysis. Using the OPUS values for each day and the total time that data were collected each day, the average weighted values were calculated for each day for latitude and longitude (so the longer occupation times held more value than the shorter times). The final value for latitude and longitude was used in GrafNav for the base station value. Error was calculated using UTM output from OPUS (to get error in meters) for each day and was calculated as the absolute value of the final value minus the daily value. Person who carried out this activity:
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Mark E. Hansen
    Oceanographer
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8036 (voice)
    mhansen@usgs.gov
    Date: 29-Jul-2010 (process 3 of 5)
    Bathymetry acquisition: Bathymetry soundings were collected on the boat using a Lowrance HDS7 Fishfinder/Chartplotter with a 200 kHz transducer. The Lowrance recorded the data on a 4-gigabyte (GB) SD card at 10 Hz.
    Date: 25-Aug-2010 (process 4 of 5)
    Merging of GPS and soundings: Merging of the GPS and sounding data was done using the MathWorks MATLAB (R2015a) computing environment, to run scripts developed by USGS scientists at the St. Petersburg Coastal and Marine Science Center. First, soundings were converted from feet to meters and then GPS data were interpolated to 10 Hz. The time offset between the GPS altitude and soundings was computed using a cross-correlation with a 10 Hz resolution. Elevation of the seafloor was then computed as, z=altitude-R-depth, where R was the vertical offset between the GPS antenna and the transducer (2.30 m). Waves were removed by applying a 16-second wide Hanning convolution filter to the seafloor elevation time series. Person who carried out this activity:
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Nathaniel G. Plant
    Research Oceanographer
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8072 (voice)
    nplant@usgs.gov
    Date: 13-Oct-2020 (process 5 of 5)
    Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  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?
    The root mean square error for the base station used for processing the single-beam bathymetry was less than five centimeters (cm).
  3. How accurate are the heights or depths?
    Crossing errors were computed by comparing points located within 1 m of each other and separated by at least ten minutes (1579 crossings). Differences were randomly distributed over the survey area and showed no depth dependence. Mean difference was 12 cm, with a minimum difference of less than 1 cm and a maximum difference of 42 cm.
  4. Where are the gaps in the data? What is missing?
    This is a complete processed point file (XYZ format) for the single-beam bathymetry survey.
  5. How consistent are the relationships among the observations, including topology?
    These bathymetry data represent the surveyed lines during acquisition of single-beam bathymetry data collected at Cape Canaveral, Florida in July 2010.

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:
The U.S. Geological Survey requests to be acknowledged as originators of the data in future products or derivative research.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey (USGS)
    Attn: David M. Thompson
    600 4th Street South
    Saint Petersburg, FL

    727-502-8079 (voice)
    727-502-8001 (FAX)
    dthompson@usgs.gov
  2. What's the catalog number I need to order this data set?
  3. What legal disclaimers am I supposed to read?
    Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2020
Metadata author:
U.S. Geological Survey (USGS)
Attn: David M. Thompson
600 4th Street South
Saint Petersburg, FL
UNITED STATES

727-502-8079 (voice)
727-502-8001 (FAX)
dthompson@usgs.gov
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/canaveral_2010_metadata.faq.html>
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