X-Radiographs Data

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Charles W. Holmes (retired) Debra Willard, 2002, X-Radiographs Data.

   Online Links:

   • <http://sofia.usgs.gov/exchange/holmes/holmesxradio.html>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -81.1

   East_Bounding_Coordinate: -80.4

   North_Bounding_Coordinate: 25.21

   South_Bounding_Coordinate: 24.9

3. What does it look like?

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

   Beginning_Date: 1994

   Ending_Date: 1997

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: digital images

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 0.01. Longitudes are given to the nearest 0.01. Latitude and longitude values are specified in Decimal degrees.

      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?

Who produced the data set?

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

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Debra A Willard
   U.S. Geological Survey
   926A National Center
   Reston, VA 20192
   

   703 648 5320 (voice)
   703 648 6953 (FAX)
   dwillard@usgs.gov
   

Why was the data set created?

In order to manage an ecosystem, it is imperative to define the rate at which ecologic, physical and chemical changes have occurred. The lack of historical records documenting ecological changes dictates that other methods are used to measure the rate of change. A common method of "dating" change is to measure the decay of naturally occurring radioactive nuclides.

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: Unknown (process 1 of 1)

   X-radiographs were made of cores from Rabbit Key, Cluett Key Pond, Whipray Basin,Bob Allen Key, Rankin Bight, Lake Ingraham, north and south Russell Bank, Johnson Key, Porjoe Key, Pass Key, Crocodile Point, Trout Creek Spiit, and Little Madeira Bay to assess sediment disturbance over the length of the cores. The x-radiographs were made in a hospital using their x-ray equipment.

   Person who carried out this activity:
   

   Debra A Willard
   U.S. Geological Survey
   926A National Center
   Reston, VA 20192
   

   703 648 5320 (voice)
   703 648 6953 (FAX)
   dwillard@usgs.gov
   

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

   Gough, L. P. Kotra, R. K.; Holmes, C. W., 2000, Regional Geochemistry of Metals in Organic-Rich Sediments, Sawgrass, and Surface Water from Taylor Slough, Florida: USGS Open-File Report 00-327, U.S. Geological Survey, Reston, VA.

   Online Links:

   • <http://sofia.usgs.gov/publications/ofr/00-327/>

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?

   unknown

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

   unknown

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

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
   USA
   

   727 803-8747 ext 3028 (voice)
   727 803-2030 (FAX)
   hhenkel@usgs.gov
   

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

   X-Radiographs Data

3. What legal disclaimers am I supposed to read?

   No warrantees are implied or explicit for the data

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	JPEG (version unknown) Size: 0.26
     Network links:	<http://sofia.usgs.gov/exchange/holmes/holmesxradio.html>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 31-Oct-2007

Metadata author:

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

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
sofia-metadata@usgs.gov

Metadata standard:

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

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 Tue Nov 27 09:09:13 2007