Sommerfield, 2001: GeoCLUTTER CH01-17 Sediment Grain Size Analysis, New Jersey

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?
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  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?
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• 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?
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Title:

Sommerfield, 2001: GeoCLUTTER CH01-17 Sediment Grain Size Analysis, New Jersey

Abstract:

Seafloor sediment grainsize analyses performed as part of an ONR geoacoustics research program. Some of this data overlaps with the CH01-17 data set.

1. How should this data set be cited?

   Sommerfield, Christopher K. , 2001, Sommerfield, 2001: GeoCLUTTER CH01-17 Sediment Grain Size Analysis, New Jersey.

   Online Links:

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -72.867920

   East_Bounding_Coordinate: -72.739300

   North_Bounding_Coordinate: 39.338890

   South_Bounding_Coordinate: 39.266980

3. What does it look like?

   sommerfield1.jpg (JPEG)

   Image map showing extent and distribution of data layer coverage

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

   Calendar_Date: 2001

   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 (57)

   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 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.
      

7. How does the data set describe geographic features?

   sommerfield1

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   LATITUDE

   Latitude of coordinate description (Source: Source report)

   LONGITUDE

   Longitude of coordinate description (Source: Source report)

   SITENAME

   Survey or laboratory code for site (Source: Data compiler)

   Entity_and_Attribute_Overview:

   The following fields were entered into usSEABED: SFS data: Sample ID :Sampling Interval:Time:Water Content(%):N Latitude::W Longitude TXR data: % Gravel:% Sand:% Silt:% Clay:% Mud LTH data: Class ACU data: WATER Content % ACU metadata: Cruise:Sample ID:Sample:Water:Porosity: core locations and details

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

2. Who also contributed to the data set?

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

   Dr. Christopher K. Sommerfield
   University of Delaware, Graduate College of Marine Studies
   Assistant Professor of Oceanography
   700 Pilottown Road
   Lewes, Delaware 19958
   USA
   

   (302) 645-4255 (voice)
   (302) 645-4007 (FAX)
   cs@udel.edu
   

Geoacoustics

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:
   

   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
   

   Data sources used in this process:

   • sommerfieldJan04.xls Sheet=sample locns
   • sommerfieldJan04.xls Sheet=porosity

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

   Sommerfield, Christopher K. , Sedimentology of a Morphologically Complex Seafloor Environment, New Jersey Continental Shelf.

   Online Links:

   • <http://www.onr.navy.mil/sci_tech/ocean/reports/docs/cg/03/cgsommer.pdf>

   Other_Citation_Details: Grant Number: N00014-03-1-0032

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?

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?

   Sommerfield, 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?
   • Availability in digital form:

     Data format:	Size: 0.020

   • Cost to order the data:

Dates:

Last modified: 25-May-2005
Last Reviewed: 03-Mar-2005

Metadata author:

Jamey Reid
U.S. Geological Survey
IT Specialist (Data Management)
384 Woods Hole Rd.
Woods Hole, MA 02543-1598

(508) 548-8700 x2204 (voice)
(508) 457-2310 (FAX)
jreid@usgs.gov

Metadata standard:

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

Metadata extensions used:

• <http://www.esri.com/metadata/esriprof80.html>