Archive of side scan sonar and bathymetry data collected during USGS cruise 06FSH01 offshore of Siesta Key, Florida, May 2006.

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Frequently anticipated questions:


What does this data set describe?

Title:
Archive of side scan sonar and bathymetry data collected during USGS cruise 06FSH01 offshore of Siesta Key, Florida, May 2006.
Abstract:
This data set contains swath bathymetric data collected during USGS cruise 06FSH01 aboard the R/V G.K. Gilbert. A side scan sonar, bathymetric, and high-resolution seismic-reflection survey was conducted off Sarasota, FL to describe the relationship between the sediments and morphology of the inner shelf and adjacent shoreface. These data are part of the Florida Shelf Habitat (FLaSH) map project.
For more information on the seismic surveys see http://walrus.wr.usgs.gov/infobank/g/g106fl/html/g-1-06 -fl.meta.html
These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications.
Supplemental_Information:
In May of 2006, the U.S. Geological Survey conducted a geophysical survey offshore of Siesta Key, FL, as part of the USGS Florida Shelf Habitat (FLaSH) study, a multiagency benthic habitat mapping project. For more information refer to http://coastal.er.usgs.gov/flash/index.html. This report serves as an archive of the processed side scan sonar mosaic, processed singlebeam and swath bathymetry images, processed x,y,z swath bathymetry data, trackline maps, navigation files, GIS files, Field Activity Collection System (FACS) logs, observer's logbook, and formal FGDC metadata. Scanned images of the handwritten FACS logs and handwritten science logbook (12 MB) are also provided as PDF files. Gridded and interpolated surface digital images of the bathymetry are also provided. Refer to the Acronyms page for expansion of acronyms and abbreviations used in this report.The USGS Florida Integrated Science Center (FISC) - St. Petersburg assigns a unique identifier to each cruise or field activity. For example, 06FSH01 tells us the data were collected in 2006 for the Florida Shelf Habitat (FLaSH) study and the data were collected during the first field activity for that project in that calendar year. Refer to http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html for a detailed description of the method used to assign the field activity ID.Aboard the R/V G.K. Gilbert, side scan sonar and interferometric swath bathymetry data were collected simultaneously along the tracklines. The side scan sonar towfish was towed behind the vessel close to the seafloor. The interferometric swath transducer was pole mounted to the ship's hull. See the digital FACS equipment log (13 KB) for details about the acquisition equipment used. Both raw data sets were stored digitally and processed using CARIS software in the St. Petersburg office. For more detailed information on processing refer to the Equipment and Processing page. Post-processing of the swath data set revealed a motion artifact which is attributed to movement of the pole in relation to the boat. Due to scheduling constraints, the survey was forced to take place in less than ideal weather conditions, which caused a reduction in data quality. The rough seas contributed to both the movement of the pole and the very high noise base seen in the amplitude data.In addition, singlebeam bathymetry was collected aboard the R/V Streeterville using SANDS, which is a singlebeam acoustic sounding GPS-based hydrographic data collection and processing system. Differential boat position was recorded using GPS referenced to a land-based benchmark which is occupied throughout the survey. Boat position, boat motion (heave, pitch, and roll), and depth readings are collected and stored in real time on the vessel and are later merged with the DGPS information using time correlations. For more detailed information on processing refer to the Equipment and Processing page. CHIRP data were also collected during the survey and are archived separately in Data Series 254 and can be downloaded at http://pubs.usgs.gov/ds/2007/254.
  1. How might this data set be cited?
    U.S. Geological Survey, Ciembronowicz, Kate T., Flocks, James G., Wiese, Dana S., Dewitt, Nancy T., Ferina, Nick F., Robbins, Lisa L., and Harrison, Arnell S., 2007, Archive of side scan sonar and bathymetry data collected during USGS cruise 06FSH01 offshore of Siesta Key, Florida, May 2006.: U.S. Geological Survey Data Series 291, U.S. Geological Survey, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -82.630113
    East_Bounding_Coordinate: -82.514193
    North_Bounding_Coordinate: 27.267895
    South_Bounding_Coordinate: 27.178480
  3. What does it look like?
    http://pubs.usgs.gov/ds/291/html/images/Side_Scan_layout.gif (GIF)
    Side Scan Sonar Mosaic with coastline
    http://pubs.usgs.gov/ds/291/html/images/bathy_5m.jpg (JPG)
    Swath Bathymetry 5 meter grid
    http://pubs.usgs.gov/ds/291/html/images/bathy_interpolated.jpg (JPG)
    Swath Bathymetry Interpolated Surface
    http://pubs.usgs.gov/ds/291/html/images/singlebeam_10_m_grid.gif (GIF)
    Singlebeam Bathymetry 1-Meter contours over 10-Meter gridded surface
    http://pubs.usgs.gov/ds/291/html/images/Side_Scan_Mosaic.gif (GIF)
    Side Scan Sonar Mosaic
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 10-May-2006
    Ending_Date: 15-May-2006
    Currentness_Reference:
    Data collection interval
  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 300 x 349 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: 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 32.550000
      Ordinates (y-coordinates) are specified to the nearest 32.550000
      Planar coordinates are specified in meters
      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: assumed sea level
      Altitude_Resolution: 1
      Altitude_Distance_Units: two-way travel time
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates
      Depth_System_Definition:
      Depth_Datum_Name: local surface (sea level)
      Depth_Resolution: 10cm
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    Band_1
    raster (Source: Interferometric sonar data)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
    • Kate T. Ciembronowicz
    • James G. Flocks
    • Dana S. Wiese
    • Nancy T. Dewitt
    • Nick F. Ferina
    • Lisa L. Robbins
    • Arnell S. Harrison
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    USGS St. Petersburg Field Office
    Attn: Dana Wiese
    600 4th Street South
    St. Petersburg, FL
    USA

    727-803-8747 x3051 (voice)
    727-803-2000 (FAX)
    dwiese@usgs.gov

Why was the data set created?

Part of an offshore site survey using high resolution geophysical mapping (seismic, side scan, and singlebeam bathymetery) techniques as part of the Florida Shelf Habitat (FLaSH) map project. More information at http://coastal.er.usgs.gov/flash.

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: 2007 (process 1 of 4)
    The raw Submetrix data (SXP files) were processed using CARIS HIPS and SIPS v-6.0. A single value sound velocity profile was applied using 1,538.0 m/s. A tide correction was applied using verified tidal data from the NOAA station at Clearwater Beach, FL (#8726724), and referenced to Mean Lower Low Water (MLLW). The Swath Editor within the HIPS package was used to edit the data on a ping-by-ping basis, in both the across- and along-track dimension. Spurious or erroneous data were removed. The navigation and attitude data were also graphically examined for each line of data. The HIPS software was used to create a BASE surface similar to a weighted grid at 5-m grid cell size. The 5-m gridded data were then exported to an x,y,z ASCII file. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Kate Ciembronowicz
    Geologist
    600 4th Street South
    Saint Petersburg, FL
    USA

    727-803-8747 x3124 (voice)
    727-803-2000 (FAX)
    kciembro@usgs.gov
    Date: 2007 (process 2 of 4)
    The 5-m x,y,z ASCII data were imported into ESRI ArcGIS version 9.1 software using the ASCII to GRID command. An ordinary kriging interpolation was used in order to generate a continuous bathymetric surface from the interferometric sonar data. This surface was exported to raster using a default cell size of 32. This file is named raster_cell32. Person who carried out this activity:
    Kate Ciembronowicz
    U.S. Geological Survey, Florida Integrated Science Center, St. Petersburg, FL
    Geologist
    600 4th Street South
    Saint Petersburg, FL
    USA

    727-803-8747 x3124 (voice)
    727-803-2000 (FAX)
    kciembro@usgs.gov
    Date: 14-Feb-2017 (process 3 of 4)
    Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Alan O. Allwardt
    Contractor -- Information Specialist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7551 (voice)
    831-427-4748 (FAX)
    aallwardt@usgs.gov
    Date: 13-Oct-2020 (process 4 of 4)
    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?
    The data set is from a single cruise and collection platform, therefore is internally consistent. All data were acquired with a SEA, Ltd. SWATHplus interferometric sonar. Postprocessing of the swath data set revealed a motion artifact which is attributed to movement of the pole in relation to the boat. Due to scheduling constraints, the survey was forced to take place in less than ideal weather conditions, which caused a reduction in data quality. The rough seas contributed to both the movement of the pole and the very high noise base seen in the amplitude data.
  2. How accurate are the geographic locations?
    The ship was navigated with DGPS using two antennas and integrated OmniSTAR/Seastar differential correction. Unless noted all DGPS data are referenced to WGS84 (NAD 83). The fathometer is mounted on the starboard side of the vessel. Offset between the sonar head and the DGPS antenna were measured, and the horizontal accuracy of bathymetric data is within +/- 1-2 m. Motion of the fathometer is not measured.
  3. How accurate are the heights or depths?
    Ship motion was measured using a CodaOctopus F190 motion sensor and gyro with dual frequency GPS and integral satellite differential receiver. The interferometric sonar is an angle-measuring system; depth accuracy decreases with increasing horizontal range. The swath width of the interferometric sonar varied as a function of depth but generally achieved 7- 10 times the water depth. Vertical accuracy is directly affected by the accuracy of both the navigation system and tidal measurements.
  4. Where are the gaps in the data? What is missing?
    The following report was not documented during the data collection or metadata creation process. Contact the primary author of this report or the St. Petersburg Coastal and Marine Science Center.
  5. How consistent are the relationships among the observations, including topology?
    The following report was not documented during the data collection or metadata creation process. Contact the primary author of this report or the St. Petersburg Coastal and Marine Science Center.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
The U.S. Geological Survey must be referenced as the originator of this data set in any future products or research derived from these data.
Use_Constraints: These data are not to be used for navigation.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    600 4th Street South
    St. Petersburg, Florida
    USA

    727-803-8747 (voice)
  2. What's the catalog number I need to order this data set? Downloadable data
  3. What legal disclaimers am I supposed to read?
    This DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, 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 imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained therein. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 22-Sep-2021
Metadata author:
Arnell Harrison
USGS FISC
Geologist
St. Petersburg, FL
USA

727-803-8747 x3111 (voice)
727-803-2032 (FAX)
aharrison@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/ds-291metadata.faq.html>
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