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  U.S. Geological Survey Open-File Report 02-002

MMS84: Location of cores collected during cruise R/V ATLANTIC TWIN 84-1 (AT-84-1)

Metadata also available as: HTML - TEXT

Frequently-anticipated questions:

What does this data set describe?
    Title:
    MMS84: Location of cores collected during cruise R/V ATLANTIC TWIN 84-1 (AT-84-1)
    Abstract:
    This GIS layer contains the station navigation for vibracores collected in Long Island Sound during 1984. These cores were originally collected to study nearshore geologic framework.

  1. How should this data set be cited?

    DiGiacomo-Cohen(comp.), Mary, 2002, MMS84: Location of cores collected during cruise R/V ATLANTIC TWIN 84-1 (AT-84-1): U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center.

    Online Links:

    This is part of the following larger work.

    Poppe, Larry, and Paskevich, Valerie, 2002, Geological Framework data from Long Island Sound, 1981-1990: A Digital Data Release: U.S. Geological Survey Open-File Report 02-002, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole, MA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -73.155838
    East_Bounding_Coordinate: -72.311668
    North_Bounding_Coordinate: 41.210831
    South_Bounding_Coordinate: 41.015831

  3. What does it look like?

    ../../../htmldocs/images/browse/mms84.gif (GIF)
    location of MMS84 cores shown in relationship to Long Island Sound area

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

    Calendar_Date: 26-Sep-1984
    Currentness_Reference: ground condition

  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):

      • Point (13)

    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?

    mms84
    shapefile attribute table (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Frequency of measurement: None planned

    Sequential unique whole numbers that are automatically generated.

    Range of values
    Units:none
    Resolution:Not applicable

    Shape
    Feature geometry. (Source: ESRI)

    ValueDefinition
    Pointpoint data

    Coordinates defining the features.

    CRUISEID
    Name given to cruise during which the cores were collected. (Source: assigned)

    ValueDefinition
    AT-84-1identifier assigned to cruise R/V ATLANTIC TWIN 84-1

    DATE
    Date when core was collected. (Source: Original logs generated aboard the Atlantic Twin 84-1 (AT84-1))

    ValueDefinition
    09/26/84Date core was collected recorded as ASCII string.
    09/27/84Date core was collected recorded as ASCII string.
    09/28/84Date core was collected recorded as ASCII string.
    10/05/84Date core was collected recorded as ASCII string.
    10/06/84Date core was collected recorded as ASCII string.

    COREID
    Numbers assigned to cores collected during cruise R/V Atlantic Twin (AT84-1) (Source: Ralph Lewis, CT DEP)

    Frequency of measurement: As needed

    ValueDefinition
    LISAT1 throught LISAT13ASCII character string (LISAT) followed by assigned sequential numeric integer of core

    LAT
    Latitude in decimal degrees of the navigation point (Source: Compiler)

    Frequency of measurement: As needed

    Range of values
    Minimum:41.015831
    Maximum:41.201831
    Units:decimal degrees
    Resolution:0.000001 degrees

    LON
    Longitude in decimal degrees of the navigation point (Source: Compiler)

    Frequency of measurement: As needed

    Range of values
    Minimum:-72.311668
    Maximum:-73.155838
    Units:decimal degrees
    Resolution:0.000001

    URL
    Link to the HTML page containing the text description of the associated core. URL path is relative to the ArcView project home. (Source: Processor)

    Relative path and filename containing the text description of the associated core.

    Entity_and_Attribute_Overview:
    This datalayer (navigation of the 1984 MMS cores from LIS) provides information location of vibracores used to interpret the regional geologic framework.
    Entity_and_Attribute_Detail_Citation:
    Geological Framework data from Long Island Sound, 1981-1990: a digital release

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?

    Ralph Lewis the original Connecticut project chief; and Mary DiGiacomo-Cohen and Valerie Paskevich for completing the Arc processing and creation of the GIS data layer.

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

    U.S. Geological Survey
    c/o Larry Poppe
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Hours_of_Service: 0800-1600

Why was the data set created?
The purpose is to disseminate a digital version of a regional map showing the distribution of vibracores collected in Long Island Sound aboard the Atlantic Twin as part of a cooperative between New England coastal states and the Minerals Management Service. These cores, which were used to verify interpretations of high-resolution seismic-reflection profiles, can be used to provide useful information about the framework geology in this region.

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

    MMS core location navigation logs (source 1 of 1)
    Thomas(comp.), Hugo, 19850000, The geologic framework of southern New England - vibracoring of Long Island Sound: Final Summary Report to the Minerals Management Service Parent Project 14-12-0001-30115, Connecticut DEP, Hartford.

    This is part of the following larger work.

    Lewis, Ralph, and Needell, Sally, 19870000, Maps showing the stratigraphic framework and Quaternary geologic history of eastern Long Island Sound: U.S. Geological Survey Miscellaneous Field Study MF-1939-A, U.S. Geological Survey, Woods Hole Field Center.

    Type_of_Source_Media: Vibracore cruise logs and report, navigated with LORAN-C
    Source_Scale_Denominator: 80,000
    Source_Contribution:
    Vibracores were colected as part of a cooperative program between MMS and New England coastal states. This dataset contains the locations of those cores collected in Long Island Sound.

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

    Date: 1991 (process 1 of 4)
    Navigation points from the original onboard logs were hand plotted on charts with Loran overlays. These overlays were then registered and digitized (using a Calcomp 9100 table and PC Arc/Info) to create point coverages with CT state plane coordinates. Attributes were added.

    Person who carried out this activity:

    Connecticut DEP
    c/o Mary DiGiacomo-Cohen
    Long Island Sound Resource Center
    UCONN Avery Point
    1080 Shennecossett Road
    Groton, CT 06340
    USA

    (860) 405-9015 (voice)
    lisrc@uconnvm.uconn.edu

    Data sources used in this process:
    • MMS core location navigation logs

    Data sources produced in this process:

    • R/V ATLANTIC TWIN Cores navigation coverage

    Date: 2001 (process 2 of 4)
    The navigation coverage was projected to Latitude/Longitude using Arc/Info. Decimal degree coordinates were ungenerated and joined to the attribute table. A shapefile was generated using ArcView.

    Person who carried out this activity:

    Connecticut DEP
    c/o Mary DiGiacomo-Cohen
    Long Island Sound Recource Center
    UCONN Avery Point
    1080 Shennecossett Road
    Groton, CT 06340
    USA

    (860)405-9015 (voice)
    lisrc@uconnvm.uconn.edu

    Data sources used in this process:
    • ATCores navigation coverage

    Data sources produced in this process:

    • ATCores navigation coverage

    Date: 03-Apr-2002 (process 3 of 4)
    The AT84-1 shapefile name was changed to be more descriptive within the USGS Open-File Report 02-002.

    Person who carried out this activity:

    Valerie Paskevich
    U.S. Geological Survey
    Computer Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov

    Data sources used in this process:
    • ATCores navigation coverage

    Data sources produced in this process:

    • mms84.dbf
    • mms84.shp
    • mms84.shx
    • mms84.sbn
    • mms84.sbx

    Date: 04-Apr-2002 (process 4 of 4)
    Added the attribute field URL to include the relative path name from the ArcView project home to the text description of the associated core.

    Person who carried out this activity:

    Valerie Paskevich
    U.S. Geological Survey
    Computer Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov

    Data sources used in this process:
    • mms84.dbf

    Data sources produced in this process:

    • mms84.dbf

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

    All attribute data were recorded by the chief scientist and entered and checked by the compilers in a consistent manner.

  2. How accurate are the geographic locations?

    Navigation was done by Loran C. Typical Loran accuracy for LIS is about 100 m.

  3. How accurate are the heights or depths?

    Tides are less than 2 m

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

    Complete information is provided for all navigation points in the data set.

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

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

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:
The U.S. Geological Survey, Connecticut DEP, and the U.S. Minerals Management Service must be referenced as the originators of the dataset in any future products or research derived from these data.

Although this derived data set and its lineage dataset have been used by the 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.

  1. Who distributes the data set? (Distributor 1 of 1)

    U.S. Geological Survey
    c/o Larry Poppe
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

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

    Long Island Sound: mms84.shp

  3. What legal disclaimers am I supposed to read?

    Although this derived data set and its lineage dataset have been used by the 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.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    None

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

    The AT84-1 navigation overlay is available in an ArcView shapefile format. The user must have ESRI's 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 the data.

Who wrote the metadata?
Dates:
Last modified: 04-Apr-2002

Metadata author:
Valerie Paskevich
U.S. Geological Survey
Computer Specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998
 
Generated by mp version 2.7.3 on Thu Apr 04 08:54:18 2002