Navigation Points for CERC Cores (CERCNAV)

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Frequently anticipated questions:

What does this data set describe?

Title: Navigation Points for CERC Cores (CERCNAV)
Abstract:
This GIS layer contains the station navigation for the U.S. Army Corps of Engineers Coastal Engineering Research Center (CERC) cores collected in Long Island Sound. These cores were originally collected in 1967 as part of the Inner Continental Shelf Sediment and Structure (ICONS) program to appraise sand resources.
Supplemental_Information:
When the USACOE ICONS program was active, each of the 18 project areas was stand-alone and covered sites on the East, West , and Gulf coasts and Great Lakes. The numbering system was the same throughout this program, but was restarted for each set of cores (e.g. those from Long Island Sound had their own set of IDs). Therefore each area had a core no. 1 and the core IDs increased numerically with that area. Andrew Grosz (USGS), who used the cores for a heavy-mineral assessment, wanted a more national perspective so he had a new, continuous set of numbers assigned to the approximately 1500 cores that George Burbank at Hampton University split and described (USGSID). Because not all of the cores collected from an area as part of the ICONS program were used in the CERC Technical Reports, some cores do not have data in the CERCID (originally 81_1ID) field.
  1. How might this data set be cited?
    DiGiacomo-Cohen(comp.), Mary, 2002, Navigation Points for CERC Cores (CERCNAV): U.S. Geological Survey Open-File Report 2002-002, U.S. Geological Survey, Woods Hole Field Center.

    Online Links:

    This is part of the following larger work.

    Poppe(comp.), Larry, and Paskevich(comp.), Valerie, 2002, Geological Framework Data from Long Island Sound, 1981-1990: a digital data release: U.S. Geological Survey Open-File Report 2002-002, 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: -73.747002
    East_Bounding_Coordinate: -71.575302
    North_Bounding_Coordinate: 41.316750
    South_Bounding_Coordinate: 40.880329
  3. What does it look like?
    ../../../htmldocs/images/browse/cercnav.gif (GIF)
    location of CERC cores shown in relationship to Long Island Sound area
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1981
    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 (97)
    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 0.0000001. Longitudes are given to the nearest 0.0000001. 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?
    cercnav
    shapefile attribute table (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI)
    ValueDefinition
    PointCoordinates defining the features.
    Coordinates defining the features.
    CRUISEID
    Name given to cruise during which the cores were collected. (Source: assigned)
    ValueDefinition
    CERCUS Army Corps of Engineers Coastal Engineering Research Center (CERC)
    LON
    Longitude in decimal degrees of the core location as plotted (Source: compiler)
    Range of values
    Minimum:-71.575302
    Maximum:-73.747002
    Units:Decimal degrees
    Resolution:0.000001
    LAT
    Latitude in decimal degrees of the core location as plotted (Source: compiler)
    Range of values
    Minimum:40.880329
    Maximum:41.316750
    Units:decimal degrees
    Resolution:0.000001
    USGSID
    Core number assigned by the USGS (Andrew Grosz) (Source: USGS)
    Range of values
    Minimum:382
    Maximum:1298
    Units:integers
    Resolution:1
    CERCID
    Numbers assigned to cores in CERC Technical Paper 81_3 (Williams, 1981). When the USACOE ICONS program was active, each of the 18 project areas was stand-alone and covered sites on the East, West , and Gulf coasts and Great Lakes. The numbering system was the same throughout this program, but was restarted for each set of cores (e.g. those from Long Island Sound had their own set of IDs). Therefore each area had a core no. 1 and the core IDs increased numerically with that area. Andrew Grosz (USGS), who used the cores for a heavy-mineral assessment, wanted a more national perspective so he had a new, continuous set of numbers assigned to the approximately 1500 cores that George Burbank at Hampton University split and described. Because not all of the cores collected from an area as part of the ICONS program were used in the CERC Technical Reports, some cores do not have data in the CERCID field. (Source: Jeff Williams)
    Range of values
    Minimum:1
    Maximum:78
    Units:integers and letters
    DATE
    Year core was collected. (Source: compiler)
    ValueDefinition
    1967calendar year
    Entity_and_Attribute_Overview:
    This datalayer (navigation of the CERC cores from LIS) provides information location of vibra cores used to interpret the geologic framework and sand resources.
    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)
    • Mary DiGiacomo-Cohen(comp.)
  2. Who also contributed to the data set?
    Jeff Williams the original USACOE 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
    Attn: Larry Poppe
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    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 vibra cores collected in Long Island Sound as part of the ICONS program of the USACOE. These cores 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?
    CERC core locations (source 1 of 1)
    various(comp.), Unknown, CERC / ICONS coring cruise unpublished data.

    Type_of_Source_Media: Vibra corer cruise mylar navigation plot
    Source_Scale_Denominator: 80,000
    Source_Contribution:
    Vibra cores were collected as part of the USACOE's ICONS program. 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 5)
    80,000 scale mylar plots of the core locations (either provided by, or based upon the original navigation system plots) were registered and digitized (using a Calcomp 9100 table and PC Arc/Info) to create point coverages with CT state plane coordinates. Attributes (COREID and 81_1ID) for coreids were added. Person who carried out this activity:
    Connecticut DEP
    Attn: Mary DiGiacomo-Cohen
    Long Island Sound Resource Center
    UCONN Avery Point
    1080 Shennecossett Road
    Groton, CT
    USA

    (860) 405-9015 (voice)
    lisrc@uconnvm.uconn.edu
    Data sources used in this process:
    • LIS CERC core location mylar plots
    Data sources produced in this process:
    • CERC core location coverage
    Date: 2001 (process 2 of 5)
    The navigation coverage was projected to Latitude/Longitude using Arc/Info. Decimal degree coordinates were ungenerated and joined to the attribute table. Some attribute data (IDs corresponding to the Williams (1981) were added. A shapefile was generated using ArcView. Person who carried out this activity:
    Connecticut DEP
    Attn: Mary DiGiacomo-Cohen
    Long Island Sound Recource Center
    UCONN Avery Point
    1080 Shennecossett Road
    Groton, CT
    USA

    (860)405-9015 (voice)
    lisrc@uconnvm.uconn.edu
    Data sources used in this process:
    • CERC core location coverage
    Data sources produced in this process:
    • CERC shapefiles
    Date: 08-Feb-2002 (process 3 of 5)
    Additional IDs (corresponding to the Williams (1981)) were added. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Computer Specialist
    384 Woods Hole Road
    Woods Hole, MA

    (508) 548-8700 x2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov
    Data sources used in this process:
    • CERC shapefiles
    Data sources produced in this process:
    • cercnav.dbf
    • cercnav.shp
    • cercnav.shx
    • cercnav.sbx
    • cercnav.sbn
    Date: 01-Apr-2002 (process 4 of 5)
    The original field names, 81_1ID (Z1_1ID) and COREID were changed to field names CERCID and USGSID to be more descriptive. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Computer Specialist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov
    Data sources used in this process:
    • cercnav.dbf
    Data sources produced in this process:
    • cercnav.dbf
    Date: 18-Aug-2021 (process 5 of 5)
    The metadata was edited to remove errors as well as update some information. Edits include updating the citation section with the DOI link and modifying the title, added the USGS Thesaurus and ISO 19115 Topic Category thesaurus, added keywords section with USGS persistent identifier as theme keyword, added link to cross-reference, used a generic email address in metadata, replaced distribution liability with FSP statement. Other blank fields were deleted. The metadata date (20020402), but not the contact (except email and contact instructions) was updated. The metadata available from a harvester may supersede metadata available from the publication. Compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Williams(comp.), Jeff, 1981, Sand resources and geological character of Long Island Sound: USACOE Coastal Engineering Research Center Technical Paper 81-3, U.S. Army Corps of Engineers, Fort Belvoir, VA.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    All attribute data were entered and checked by the compilers in a consistent manner.
  2. How accurate are the geographic locations?
    80,000 scale.
  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?
    Core locations are provided for 96 cores with unique core ids (USGS assigned), 73 of these cores have ID's that correspond to the Williams (1981) technical paper. Core descriptions are not available for every core location.
  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 and the U.S. Army Corps of Engineers must be referenced as the originator 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 and Connecticut DEP, no warranty, expressed or implied, is made by the USGS or CT DEP 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 or CT DEP in the use of these data or related materials.
  1. Who distributes the data set? (Distributor 1 of 1)
    U. S. Geological Survey
    Attn: Larry Poppe
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    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? Long Island Sound: cerc.shp
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: The seven ArcView shapefiles (cercnav.dbf, cercnav.shp, cercnav.shx, cercnav.sbn, cercnav.sbx, cercnav.avl and cercnav.prj) comprising the navigation data for the USACOE vibracores collected in Long Island Sound and an ASCII text version of the metadata file. in format ArcView shapefile Size: 1
      Network links: https://doi.org/10.3133/ofr022
      http://woodshole.er.usgs.gov/openfile/of02-002/data/cores/cerc/
      Media you can order: DVD (Density 4.7 Gbytes) (format UDF)
      Note: The user must have a system with a DVD drive capable of reading an UDF standard DVD-R disk. To browse the information contained on this disk, the user must also have a current version of WWW browser available. The user must also have the software installed on their computer system capable to unzip the archived file.
    • Cost to order the data: none

  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 navigation overlay for the CERC cores is available in an ArcViewshapefile 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: 01-Sep-2021
Metadata author:
Valerie Paskevich
U. S. Geological Survey
Computer Specialist
384 Woods Hole Road
Woods Hole, MA
USA

(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2002-002/cercnam_metadata.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:20:17 2021