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Florida Bay Surface Maps

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Frequently-anticipated questions:

What does this data set describe?

Title: Florida Bay Surface Maps
The maps show the surface temperatures, salinities, pH, and dissolved oxygen for February and April 2002
  1. How should this data set be cited?

    Halley, Robert (retired) Yates, Kimberly, 2004, Florida Bay Surface Maps.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -81.3
    East_Bounding_Coordinate: -80.1
    North_Bounding_Coordinate: 25.3
    South_Bounding_Coordinate: 25.6

  3. What does it look like?

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

    Calendar_Date: Feb-2002
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: maps

  6. How does the data set represent geographic features?

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

      Indirect_Spatial_Reference: Florida Bay

    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 1. Longitudes are given to the nearest 1. Latitude and longitude values are specified in Degrees, minutes, and decimal seconds.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.

  7. How does the data set describe geographic features?

    Data shown on the individual maps include salinity (interval 5 ppt), temperature (interval 1 degree C), pH (0.1 change in pH), dissolved oxygen (interval mg/L)
    Entity_and_Attribute_Detail_Citation: USGS personnel

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • Halley, Robert (retired)

  2. Who also contributed to the data set?

    Data collected by Chris DuFore, Keith Ludwig, Nancy Dewitt, and B. J. Reynolds of the USGS. The maps were prepared by Iuri Herzfeld of the USGS.

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

    Chris DuFore
    U.S. Geological Survey
    600 4th Street South
    St. Petersburg, FL 33701

    727 803-8747 ext. 3041 (voice)

Why was the data set created?

The production and transport of biogenic carbonate sediments play a key role in developing mud banks and altering circulation patterns in Florida Bay. Accurate measurements of sediment accumulation and production rates are required to determine how these processes have changed during the last century in response to anthropogenic influences. Estimates of sediment accumulation rates and annual production rates based on standing crop and turnover of various calcifying species are available from previous research. Carbonate sedimentation and organic productivity (calcification, photosynthesis, and respiration) are most effectively determined from precise, in situ measurements of alkalinity, pH, temperature, conductivity, and air:sea CO2 and O2 gas fluxes.

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: 2002 (process 1 of 1)
    Florida Bay surface temperatures, surface salinities, surface pH, and surface dissolved exygen were measureed as part of the study of sediment transport and its influence on water quality in the Bay

    Person who carried out this activity:

    Chris DuFore
    U.S. Geological Survey
    600 4th Street South
    St. Petersburg, FL 33701

    727 803-8747 ext. 3041 (voice)

  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?

    All location data in the study were collected using a Precision Lightweight GPS Receiver (PLGR+96) with precise positioning service (PPS). The stated accuracy for this device is less than 52 ft (16m).

  3. How accurate are the heights or depths?

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

    Value labels shown on the maps depict selected surface measurements for temperature, salinity, pH, and dissolved oxygen along the sampling path. Each sampling site and time used a different number of data points in preparation of the maps. See the individual maps for the number of data points.

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

    Precise measurements using the same equipment were made at each sampling site

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
The maps have not been reviewed for conformity with U.S. Geological Survey editorial standards

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

    Heather S. Henkel
    U.S. Geological Survey
    600 Fourth St. South
    St. Petersburg, FL 33701

    727 803-8747 ext 3028 (voice)
    727 803-2030 (FAX)

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

    Florida Bay Surface Maps

  3. What legal disclaimers am I supposed to read?

    The data have no warranties explicit or implied

  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 21-Apr-2010
Metadata author:
Heather Henkel
U.S. Geological Survey
600 Fourth Street South
St. Petersburg, FL 33701

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)

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

This page is <https://sofia.usgs.gov/metadata/sflwww/FB_surface_maps.faq.html>

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Wed Apr 21 10:09:21 2010