BOCKMAN65: U.S. Naval Oceanographic Office Cores

Metadata also available as: OUTLINE - TEXT

Frequently-anticipated questions:

What does this data set describe?
    Title: BOCKMAN65: U.S. Naval Oceanographic Office Cores
    Abstract:
    The results of the sediment size analysis performed by the U.S.Naval Oceanographic Office Geological Laboratory for six Phleger gravity cores are presented in this data layer. Some of the data in this set were originally released as part of the Deck 41 Database available from the National Geophysical Data Center. The attribute for sediment classification was added by the compilers to make these size data more useful for mapping the regional surficial sediment distribution.

  1. How should this data set be cited?

    Poppe, Lawrence J. , 2003, BOCKMAN65: U.S. Naval Oceanographic Office Cores:, U. S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Poppe, L.J., Paskevich, V.F., Williams, S.J., Hastings, M.E., Kelley, J.T., Belknap, D.F., Ward, L.G., FitzGerald, D.M., and Larsen, P.F., 2003, Surficial Sediment Data from the Gulf of Maine, Georges Bank, and vicinity: a GIS Compilation: Open-File Report 03-001, U. S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details:
    Data is released via CD-ROM media. This digital publication may also be available via the web at pubs.usgs.gov

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -71.208333
    East_Bounding_Coordinate: -71.083333
    North_Bounding_Coordinate: 40.083333
    South_Bounding_Coordinate: 39.975000

  3. What does it look like?

    bockman65 (GIF)
    Image map showing extent and distribution of data layer coverage.

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

    Calendar_Date: 1965
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: vector 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 (6)

    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 0.00001. Longitudes are given to the nearest 0.00001. 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?

    bockman65.dbf
    Shapefile Attribute Table (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    PROJECTID
    Names assigned to the data set for identification purposes (Source: Compiler)

    ValueDefinition
    Bockman65 

    CRUISEID
    Name of ship and abbreviation of survey (Source: Scientist)

    ValueDefinition
    NLONSUNLON Survey

    STATION
    Numeric identifier assigned to each sampling station (Source: Scientist)

    Range of values
    Minimum:1
    Maximum:6
    Units:integer count
    Resolution:1

    LATITUDE
    Latitude coordinate of sample location (Source: Scientist)

    Range of values
    Minimum:39.97500
    Maximum:40.08333
    Units:Decimal Degrees
    Resolution:0.00001

    LONGITUDE
    Longitude coordinate of sample location (Source: Scientis)

    Range of values
    Minimum:-71.20833
    Maximum:-71.08333
    Units:Decimal Degrees
    Resolution:0.00001

    DEPTH
    Water depth (Source: Scientist)

    Range of values
    Minimum:160
    Maximum:370
    Units:meters
    Resolution:1

    DATE
    Day month and year (ddmmyy) of sample collection (Source: Scientist)

    Character string containing date in DDMMYY format

    DEVICE
    Equipment used to collect samples (Source: Scientist)

    ValueDefinition
    PHLEGER GRAVITY CORERPhleger Gravity Corer

    GRAVEL
    Percentage of gravel in sample (Source: Scientist)

    Range of values
    Minimum:0
    Maximum:0.39
    Units:percent
    Resolution:0.01

    SAND
    Percentage of sand in sample (Source: Scientist)

    Range of values
    Minimum:30.72
    Maximum:72.83
    Units:percent
    Resolution:0.01

    SILT
    Percentage of silt in sample (Source: Scientist)

    Range of values
    Minimum:15.68
    Maximum:54.72
    Units:percent
    Resolution:0.01

    CLAY
    Percentage of clay in sample (Source: Scientist)

    Range of values
    Minimum:6.87
    Maximum:15.45
    Units:percent
    Resolution:0.01

    CLASS
    Textural classification based on a scheme devised by Shepard (1954) (Source: Compiler)

    ValueDefinition
    SANDsand content
    SILTY SANDsilty sand content
    SANDY SILTsandy silt content

    MEAN_PHI_
    Average grain size in phi units (Source: Scientist)

    Range of values
    Minimum:3.53
    Maximum:5.53
    Units:phi
    Resolution:0.01

    STDEV
    Standard deviation of the grain size distribution (Source: Scientist)

    Range of values
    Minimum:2.61
    Maximum:3.17
    Units:phi
    Resolution:0.01

    SKEWNESS
    Skewness of grain size distribution (Source: Scientist)

    Range of values
    Minimum:0.39
    Maximum:0.76
    Units:none
    Resolution:0.01

    KURTOSIS
    Peakedness of size distribution (Source: Scientist)

    Range of values
    Minimum:-0.21
    Maximum:1.86
    Resolution:0.01

    CACO3
    Percentage of carbonate in sample determined by insoluble residue (Source: Scientist)

    Range of values
    Minimum:8
    Maximum:15
    Units:percent
    Resolution:1

    COLOR
    Wet sediment color based on the GSA Rock Color Chart (Source: Scientist)

    Character String; Characters and numbers designating color

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?

    Please review the cross reference information for the original data set credit to Bockman et al. (1965), and Larry Poppe for generating the sediment classifications and creating the ArcView shapefile.

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

    Lawrence J. Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov

Why was the data set created?
The purpose of this data layer is to release a digital version of the sediment data contained in the unpublished report by Bockman et al. (1965)

How was the data set created?
  1. From what previous works were the data drawn?

    (source 1 of 1)
    Bockman, P., Coleman, J., and Hill, D.S., 1965, A Summary of Sediment Size and Composition Analyses of Cores from NLON Survey, March 1965: U.S. Naval Oceanographic Office Geological Laboratory Report Laboratory Item No. 251, U.S. Naval Oceanographic Data Center, Washington, DC.

    Type_of_Source_Media: online

  2. How were the data generated, processed, and modified?

    Date: 20-Sep-2002 (process 1 of 1)
    Some of the source information was taken from NGDC's Deck41 database (e.g. identifiers and raw grain size data); some information generated by the compilers and was manually entered into digital form (e.g. classification). This file was imported from an ASCII text file to an ArcView table. The table was later converted to an event theme in ArcView and saved as the final shapefile.

    Person who carried out this activity:

    Lawrence J. Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov

    Data sources used in this process:
    • bockman65.txt

    Data sources produced in this process:

    • bockman65.shp
    • bockman65.dbf
    • bockman65.shx

How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?

    All attributes were imported (or generated and entered) and checked by the compilers in a consistent manner.

  2. How accurate are the geographic locations?

    Navigational methods were not discussed in the original report. Navigational accuracy is unknown.

  3. How accurate are the heights or depths?

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

    Grain-size data, statistics, sediment color, carbonate composition, textural descriptions, navigation, and sample identifiers are provided for 6 stations.

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

    No additional checks for topological consistency were performed on this data.

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)

    Lawrence J. Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov

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

    Regional Mapping of Surficial Sediments: Gulf of Maine and Georges Bank, Aggregates and Habitats Projects, bockman65.shp

  3. What legal disclaimers am I supposed to read?

    Although this data set has been used by the U.S. Geological Survey, 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.

  4. How can I download or order the data?

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

    The data is available in ArcView shapefile format. The user must have ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView, the user may utilize another GIS application package capable of importing data.

Who wrote the metadata?
Dates:
Last modified: 21-Mar-2003

Metadata author:
Lawrence J. Poppe
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

508-548-8700 x2314 (voice)
508-457-2310 (FAX)
lpoppe@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Generated by mp version 2.7.3 on Fri Mar 21 11:15:41 2003

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