Data from Mayaguez Bay, Puerto Rico Cruise JA-90-3, 1990

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Frequently-anticipated questions:

What does this data set describe?

Title: Data from Mayaguez Bay, Puerto Rico Cruise JA-90-3, 1990
Abstract:
The Puerto Rico Aqueducts and Sewer Authority is presently seeking a waiver for secondary treatment of sewage from the Mayaguez regional water treatment plant. The U.S. Environmental Protection Agency has tentatively denied the waiver. Their primary concern has been the potential impact of the outfall on the surrounding marine ecosystem which includes a live coral reef complex, the Manchas Interiores and Manchas Exteriores. The Rio (River) Grande de Anasco also empties into this study area, carrying a significant load of suspended sediment and contaminants that may further stress the marine community. In order to assess adequately the relative significance of the different sources of reef stress, a program was initiated to monitor the sediment and water-quality characteristics of the Rio Grande de Anasco in addition to sampling of effluent, ocean water, and sediment in the vicinity of the outfall, as well as the coral reef. In support of this effort, in December 1990, a high-resolution sidescan-sonar and seismic-reflection survey was conducted over the area that could be affected by the sewage discharge using the research vessel JEAN A (owned and operated by the Commonwealth of Puerto Rico Department of Natural Resources) in order to provide a geologic framework, or basemap for the offshore component of this program. In this report, we present the sidescan-sonar imagery, the bathymetry of the study area, ship tracklines, sediment sample locations, grain size analyses of the sediment samples, and preliminary interpretation of the data set.
  1. How should this data set be cited?

    Schwab, William, Unpublished Material, Data from Mayaguez Bay, Puerto Rico Cruise JA-90-3, 1990.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -67.22724
    East_Bounding_Coordinate: -67.18578
    North_Bounding_Coordinate: 18.26536
    South_Bounding_Coordinate: 18.22162

  3. What does it look like?

    JA-90-3.jpg (JPEG)
    Image showing extent and distribution of data layer coverage

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

    Calendar_Date: 1990
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: tabular digital data

  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 (39)

    2. What coordinate system is used to 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? (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?

    Dr. William Schwab
    U.S. Geological Survey
    Senior Research Scientist, Team Chief Scientist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    (508) 458-8700 (voice)
    wschwab@usgs.gov

    Contact_Instructions: email preferred

Why was the data set created?

Geoacoustics and spatial variability

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 checked, formatted to dbSEABED input format, then processed using dbSEABED software to produce a range of output formats. The processing contained quality checking that may have declined to pass faulty or suspect data to outputs.

    Person who carried out this activity:

    Brian J. Buczkowski
    U.S. Geological Survey
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    (508) 458-8700 x2361 (voice)
    bbuczkowski@usgs.gov

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

    Schwab, W.C., Webb, R.M.T., Danforth, W.W., O'Brien, T.F., and Irwin, B.J., 1991, High-resolution sidescan-sonar imagery of the Manchas Interiores-Manchas Exteriores coral reef complex, Mayaguez, Puerto Rico: Open-File Report 91-436, U.S. Geological Survey.

    Online Links:

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 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: None

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

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

    Data from Mayaguez Bay, Puerto Rico Cruise JA-90-3, 1990

  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: 20-Apr-2006
Metadata author:
Brian Buczkowski
U.S. Geological Survey
Core Curator & Data Management Specialist
384 Woods Hole Rd.
Woods Hole, MA 02543-1598

(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 Thu Apr 20 11:08:30 2006