Hafen M 1999 W Florida Shelf sandwaves

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Frequently-anticipated questions:

What does this data set describe?

Title: Hafen M 1999 W Florida Shelf sandwaves
Abstract:
Two areas of the west Florida shelf seafloor were studied in order to understand the spatial and temporal variations in sedimentary cover; the relationship between sedimentary properties and remotely sensed data; and the relationships of data of different spatial and temporal scales. Analyses of side-scan sonar imagery; sediment samples; and box cores reveal spatial differences in the size; shape; spacing; surficial grain size distribution; and sub-surface sedimentary structures of sand ridges found at 5-8 m water depth compared to sand lenses at 15-18 m water depth. Northwest-southeast trending sand ridges in the nearshore area are an order of magnitude smaller in spatial extent than those in the midshelf. Side-scan backscatter reflects the heterogeneity of the nearshore surface sediments and the homogeneity of the midshelf sediments. Box core peels reveal these surficial sedimentary properties extend to a depth of 25 cm in both study areas.
  1. How should this data set be cited?

    Hafen, Mark R. , and University of South Florida, St. Petersburg, 2001, Hafen M 1999 W Florida Shelf sandwaves.

    Online Links:

    Other_Citation_Details:
    College of Marine Science, University of South Florida, St. Petersburg, Florida 33701

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -83.1111
    East_Bounding_Coordinate: -82.9059
    North_Bounding_Coordinate: 27.9502
    South_Bounding_Coordinate: 27.9133

  3. What does it look like?

    Hafen2001.jpg
    Image showing geographic extent of data layer coverage

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

    Calendar_Date: 2001
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: document and datatables

  6. How does the data set represent geographic features?

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

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

      • Entity point (274)

    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 0.123. Longitudes are given to the nearest 0.123. Latitude and longitude values are specified in Decimal degrees.

  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?

    Please review the cross reference information for the original data set credit to Hafen (2001), and Chris Jenkins for digitizing sample locations and entering the data from the source report.

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

    Chris Jenkins
    Institute of Arctic & Alpine Research (INSTAAR) University of Colorado at Boulder
    1560 30th Street
    Boulder, CO 80309-0450
    USA

    (303) 492-6387 (voice)
    (303) 492-6388 (FAX)
    chris.jenkins@colorado.edu

Why was the data set created?

The purpose of this data layer is to create a digital version of the sedimentary characteristics published by Hafen (2001) for inclusion in the usSEABED data collection.

How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 1)
    Digital data were hand formatted into dbSEABED data entry structure, then filtered and data-mined through dbSEABED software (version: db9_MNEx.bas)

    Person who carried out this activity:

    Chris Jenkins
    Institute of Arctic & Alpine Research (INSTAAR) University of Colorado at Boulder
    1560 30th Street
    Boulder, CO 80309-0450
    USA

    (303) 492-6387 (voice)
    (303) 492-6388 (FAX)

  3. What similar or related data should the user be aware of?

    Hafen, Mark R. , 2001, Spatial and Temporal Comparisons of Sedimentary Features and Properties, West Florida Shelf: College of Marine Science, University of South Florida, St. Petersburg, Florida.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    All attributes were entered and checked in a consistent manner.

  2. How accurate are the geographic locations?

    Navigational accuracy is unknown.

  3. How accurate are the heights or depths?

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

    Sedimentary descriptions and locations are provided for 274 samples.

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

    No additional check for topological consistency were performed on this data.

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:
None except that acknowledgement must be made in publications and reports of (i) the original data source, and (ii) the data integration by USGS and dbSEABED project at the University of Colorado.

  1. Who distributes the data set?[Distributor contact information not provided.]

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

    Hafen, 2001

  3. What legal disclaimers am I supposed to read?

    Although this data set has been used by the U.S. Geological Survey (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. 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 the USGS, USDOI, or 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: 23-Mar-2006
Metadata author:
U.S. Geological Survey
c/o Brian J. Buczkowski
Core Curator and Data Management Specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2361 (voice)
(508) 457-2310 (FAX)
bbuczkowski@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.24 on Mon Mar 27 19:54:39 2006