USGS - science for a changing world

USGS Geoscience Data Catalog

Additional USGS Geoscience data can be found by geographic location or by publication series.

Composite digital sidescan sonar mosaic of Sarasota, FL

Metadata also available as - [Outline] - [Parseable text] - [DIF]

Frequently-anticipated questions:

What does this data set describe?

Title: Composite digital sidescan sonar mosaic of Sarasota, FL
Abstract:
The U.S. Geological Survey, in cooperation with the University of South Florida and Eckerd College, completed a bathymetric, sidescan sonar, high-resolution seismic-reflection, and surface sediment sampling survey of the inner shelf environment along the western Florida coast. The survey area extends 15km from Sarasota Point to Buttonwood Harbor. This study is part of a larger program initiated by the U.S. Geological Survey to map the geologic framework and monitor the modern processes that affect the western Florida coastal zone. This portion of the project included a reconnaissance high-resolution seismic and side-scan sonar surveys of the entire study area, detailed mapping to identify patterns of hard grounds and sediment cover, and coring of sediments to document historical development of the inner shelf and coastal
  1. How should this data set be cited?

    David C. Twichell, Jr., 19980702, Composite digital sidescan sonar mosaic of Sarasota, FL: U.S. Geological Survey Open-File Report 99-396, U.S. Geological Survey, Woods Hole, MA.

    This is part of the following larger work.

    David C. Twichell, Jr. (comp.), and (comp.), Valerie Paskevich , 1999, Bathymetry, Sidescan Sonar Image, Surface Sediments, and Surficial Geologic map of the Inner Shelf off Sarasota, Florida: Preliminary discussion and database release: U.S. Geological Survey Open-File Report 99-396, U.S. Geological Survey, Woods Hole, MA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -82.73332
    East_Bounding_Coordinate: -82.56665
    North_Bounding_Coordinate: 27.3856
    South_Bounding_Coordinate: 27.2151

  3. What does it look like?

    <http://pubs.usgs.gov/openfile/of99-396/htmldocs/figures/fig1.jpg> (JPG)
    Grayscale map of the study area and surrounding region, 982x715 pixels, 102k bytes.
    <http://geo-nsdi.er.usgs.gov/metadata/open-file/99-396/compos.png> (PNG)
    Reduced-size rendition of the image, 810x921, Grayscale, non-interlaced, 315k bytes

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

    Beginning_Date: 02-May-1995
    Ending_Date: 08-May-1995
    Currentness_Reference: field_work

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

    Geospatial_Data_Presentation_Form: remote-sensing image

  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 4617 x 4063, type Pixel

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

      The map projection used is Transverse Mercator.

      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -81.0
      Latitude_of_Projection_Origin: +0.0
      False_Easting: 500000
      False_Northing: 0.0

      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 4.0003238217
      Ordinates (y-coordinates) are specified to the nearest 4.0465400583
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.

  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?

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

    U.S. Geological Survey
    c/o David Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

    Hours_of_Service: 8:00am-5:00pm ET; M-F

Why was the data set created?

This GIS overlay is a component of the Sarasota, Florida ArcView GIS database and contains the completed sidescan sonar mosaic for the study area. Image resolution is 4m pixels and has a black background surrounding the composite mosaic.

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-1994 (process 1 of 3)
    The individual swaths were mapped with a specific map area and projection. Two files were created with one containing the northwest to southeast lines and the second containing the southeast to northwest lines. For detailed information regarding the process, please refer to U.S. Geological Survey Open-File Report 92-536.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o David Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

    Hours_of_Service: 8:00am-5:00pm ET; M-F
    Date: 21-Jun-1994 (process 2 of 3)
    The two files containing the georeferenced strips were imported to the PCI Remote Sensing software and combined utilizing their GCPworks software package. For detailed information regarding the process, please refer to U.S. Geological Survey Open-File Report 96-281.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o David Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

    Hours_of_Service: 8:00am-5:00pm ET; M-F
    Date: 02-Jul-1998 (process 3 of 3)
    The final 1 meter mosaic was resampled to 4 meter resolution and reprojected to UTM. The final image was output as a geotiff image for archiving. To obtain the full 1 meter mosaic, please contact the originator of the dataset.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o Valerie Paskevich
    Computer Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@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?

  3. How accurate are the heights or depths?

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

    All collected data were processed and used to generate the digital mosaic.

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

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 must be referenced as the originator of the dataset in any future products or research derived from these data.

  1. Who distributes the data set? (Distributor 1 of 2)

    U.S. Geological Survey
    c/o Dave Twichell
    Data Librarian
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700-2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

  2. What's the catalog number I need to order this data set?

    USGS Open-File Report 99-396 data for compos

  3. What legal disclaimers am I supposed to read?

    Although this derived data set has been used by the USGS, no warranty, expressed or implied, is made by the USGS 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 the USGS in the use of these data or related materials.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    The user must have a program capable of reading and processing 'geotiff' images.

  1. Who distributes the data set? (Distributor 2 of 2)

    USGS Information Services
    Box 25286 Denver Federal Center
    Denver, CO 80225
    USA

    1-888-ASK-USGS (voice)
    303-202-4693 (FAX)
    ask@usgs.gov

  2. What's the catalog number I need to order this data set?

    USGS Open-File Report 99-396 data for bathy2

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 07-Jun-1999
Metadata author:
USGS, Coastal and Marine Geology Team
c/o Valerie Paskevich
Computer Specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov

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

This page is <http://geo-nsdi.er.usgs.gov/metadata/open-file/99-396/compos.faq.html>
 How other people discovered this page

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://geo-nsdi.er.usgs.gov/metadata/open-file/99-396/compos.faq.html
Page Contact Information: Peter Schweitzer
Page Last Modified: Monday, 10-Nov-2008 12:20:10 EST

Generated by mp version 2.9.8 on Mon Nov 10 12:20:10 2008