Ecological Investigations of Petrolem Production Platforms in the Central Gulf of Mexico

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?

   Texas A and M University (TAMU), and Mitchell, Francis, Unpublished material, Ecological Investigations of Petrolem Production Platforms in the Central Gulf of Mexico: Texas A and M University (TAMU), College Station, TX.

   Online Links:

   • Digital data and downloadable .pdf available at National Geophysical Data Center (NGDC): <http://oas.ngdc.noaa.gov/mgg/plsql/geolin.set_expand?v_mggid=23045003>

   Other_Citation_Details: Funded by BLM

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -90.6333

   East_Bounding_Coordinate: -89.6737

   North_Bounding_Coordinate: 29.2000

   South_Bounding_Coordinate: 28.4500

3. What does it look like?

   MGG23045003.jpg (jpg)

   Screen grab view of locations with coastline for reference

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

   Beginning_Date: 06-Jan-1979

   Ending_Date: 15-Jan-1979

   Currentness_Reference: Publication date

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

   Geospatial_Data_Presentation_Form: Digital and paper

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):

      • Point (283)

   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 0.0001. Longitudes are given to the nearest 0.0001. Latitude and longitude values are specified in Decimal degrees.

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   Data provided include sampler, site date, percentages of gravel, sand, silt, and clay; median grainsize, moment mean, standard deviation, skewness, and kurtosis; granulometric analyses at one phi-size intervals in weight percents.

   Entity_and_Attribute_Detail_Citation: Source report.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Texas A and M University (TAMU)
   • Francis Mitchell

2. Who also contributed to the data set?

   For inclusion into usSEABED: digitization and formatting Tara Kneeshaw and April Villagomez (USGS); Corrections: Jane Reid (USGS) and Chris Jenkins (University of Colorado)

3. To whom should users address questions about the data?
   National Geophysical Data Center (NGDC)
   c/o Robin R. Warnken
   E/GC3 325 Broadway
   Boulder, CO 80305-3328
   

   303-497-6338 (voice)
   Robin.R.Warnken@noaa.gov
   

Why was the data set created?

No specific purpose noted in report

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: 1978 (process 1 of 1)

   No process information given in report.

   Person who carried out this activity:
   

   Texas A and M University
   College Station, TX 77843
   

   Unknown (voice)
   

   Data sources produced in this process:

   • Unknown

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?

   Data were digitized by hand (typed in) at NGDC. For usSEABED, digital data and the scanned report were downloaded via the web, visually compared to source and corrected. Additional data may have been included from the scanned report, also available online. Where appropriate, data were tested for completeness using MS Excel.

2. How accurate are the geographic locations?

   Navigational techniques not recorded in report; latitudes and longitudes given in decimal degrees; four significant figures.

3. How accurate are the heights or depths?

   Water depth determination technique not noted in report. Water depths given in meters.

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

   All available textural, statistical, and compositional information are included in usSEABED. The Holmes (USGS) compilation may also include metal and organic contaminant values requested by or performed by the EPA, USGS, USACE, and others for these samples that are not included in usSEABED.

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

   Data fall within normal ranges for the given parameters.

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:

Cite TAMU as originators of the data and NGDC as archivers of the data

1. Who distributes the data set? (Distributor 1 of 1)
   National Geophysical Data Center (NGDC)
   c/o Robin R. Warnken
   E/GC3 325 Broadway
   Boulder, CO 80305-3328
   

   303-497-6338 (voice)
   Robin.R.Warnken@noaa.gov
   

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

   MGGID 23045003

3. What legal disclaimers am I supposed to read?

   Although this dataset has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data. Users of the data should be aware of limitations of the data due to possible imprecision due to navigational inaccuracies, limitations of the statistical data, and digitizing errors.

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

     Data format:	Text in format ASCII Size: 5 MB
     Network links:	<http://oas.ngdc.noaa.gov/mgg/plsql/geolin.set_expand?v_mggid=23045003>

   • Cost to order the data: None

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

   web browser and internet access preferred

Who wrote the metadata?

Dates:

Last modified: 2005

Metadata author:

U.S. Geological Survey
c/o Jane A. Reid
Geologist
400 Natural Bridges Drive
Santa Cruz, CA 95060

831-427-4727 (voice)
jareid@usgs.gov

Contact_Instructions: Email preferred

Metadata standard:

CSDGM Version 2 (FGDC-STD-001-1998)