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

LISBATHY: 1 m Digital Bathymetric Contours from NOAA Charts as Organized for the LISSGIS Library

Metadata also available as; HTML - TEXT

Frequently-anticipated questions:

What does this data set describe?
    Title:
    LISBATHY: 1 m Digital Bathymetric Contours from NOAA Charts as Organized for the LISSGIS Library
    Abstract:
    The Long Island Sound Study (LISS) compiled data from a number of different sources, integrated new data, and assembled a comprehensive spatial database for areas of the States of Connecticut, New York, and portions of Rhode Island which border Long Island Sound.

  1. How should this data set be cited?

    DiGiacomo-Cohen, Mary L. , Tedesco, Mark, and Polloni, Chris, 20020630, LISBATHY: 1 m Digital Bathymetric Contours from NOAA Charts as Organized for the LISSGIS Library: U.S. Geological Survey 02-002, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Paskevich, Valerie, and Poppe, Larry, 20020630, 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: -73.936708
    East_Bounding_Coordinate: -71.999687
    North_Bounding_Coordinate: 41.499656
    South_Bounding_Coordinate: 40.769513

  3. What does it look like?

    ../../../htmldocs/images/browse/lisbathy.gif (GIF)
    Image showing extent of 1 m bathymetry contours for Long Island Sound data layer.

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

    Calendar_Date: 1984
    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):

      • String (23032)

    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?

    lisbathy
    shapefile attribute file (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    ValueDefinition
    Polyline 

    Coordinates defining the features.

    LENGTH
    Length of vector segment in native units.

    Range of values
    Minimum:0.95402
    Maximum:41569.30859

    DEPTH
    Depth value, in meters, of vector contour. Value recorded as negative. (Source: User Defined)

    Frequency of measurement: None planned

    Range of values
    Minimum:-98
    Maximum:-1
    Units:meters
    Resolution:1

    DEP
    Indicates bathymetric line is a depression. (Source: Open-File 98-502 chap6\bathydoc.txt)

    ValueDefinition
    YIndicates bathymetric line is a depression.

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?

    Connecticut Department of Environmental Protection, Long Island Sound Resource Center.

  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

Why was the data set created?
Selected by the Long Island Sound Study to serve as a general bathymetric data layer in its GIS data base. Best for sound-wide applications or general information. These data can be used with geographic information systems (GIS) software to display geologic and oceanographic information for the Long Island Sound. The data are to be used for illustrations and illustrative maps on scientific topics. They are intended for science researchers, students, policy makers, and the general public. There is NO ASSURANCE of their accuracy, completeness, or precision. The contour line data were manually digitized from a published map.

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

    (source 1 of 4)
    National Oceanic and Atmospheri, National Ocean Service, 1989, NOS Bathymetry - Fishing Map, New Haven: National Ocean Service, Rockville, Maryland.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 100000
    Source_Contribution:
    These maps were selected as the most accurate data available preference over National Ocean Service (NOS) bathy point and contains numerous mistakes, and over other interpretations of most of which differ from each other.

    (source 2 of 4)
    National Oceanic and Atmospheri, National Ocean Service, 1984, NOS Topo-Bathy Map, Long Island East: National Ocean Service, Rockville, Maryland.

    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 100000
    Source_Contribution:
    These maps were selected as the most accurate data available preference over National Ocean Service (NOS) bathy point and contains numerous mistakes, and over other interpretations of most of which differ from each other.

    (source 3 of 4)
    National Oceanic and Atmospheric Administration, and U. S. Geological Survey, 1986, USGS Topo-Bathy Map, Bridgeport: NOAA/USGS, Rockville, Maryland.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 100000
    Source_Contribution:
    These maps were selected as the most accurate data available preference over National Ocean Service (NOS) bathy point and contains numerous mistakes, and over other interpretations of most of which differ from each other.

    (source 4 of 4)
    National Oceanic and Atmospheric Administration, and U. S. Geological Survey, 1984, USGS Topo-Bathy Map, Long Island West: NOAA/USGS, Rockville, Maryland.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 100000
    Source_Contribution:
    These maps were selected as the most accurate data available preference over National Ocean Service (NOS) bathy point and contains numerous mistakes, and over other interpretations of most of which differ from each other.

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

    Date: 15-Dec-1996 (process 1 of 4)
    The two bathy-topo sheets and two bathy-fishing maps were digitized by partially table digitizing and partially through scanning/vectorization.

    Person who carried out this activity:

    Applied Geographics, Inc
    c/o Linda Bischoff
    GIS Analyst
    100 Franklin St.
    Boston, MA 02110
    USA

    (617) 292-7125 (voice)
    (617) 292-7911 (FAX)
    info@appgeo.com

    Date: Unknown (process 2 of 4)
    The digitized vector data set was added to the Long Island Sound Study GIS database. An ESRI 'e00' format of the data layer was created and released on U. S. Geological Survey Open-File Report 98-502.

    Person who carried out this activity:

    Mary L. DiGiacomo-Cohen
    Long Island Sound Resource Center
    GIS Specialist
    University of Connecticut
    Groton, CT 06340
    USA

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

    Data sources produced in this process:
    • lisbathy.e00

    Date: 27-Nov-2001 (process 3 of 4)
    The ESRI export file, lisbathy.e00, was imported and converted to an ArcView shapefile. The data layer was converted from UTM projection to geographic.

    Person who carried out this activity:

    Valerie Paskevich
    U. S. Geological Survey
    Computer Specialist, GIS Cordinator
    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:
    • lisbathy.e00

    Data sources produced in this process:

    • lisbathy.dbf
    • lisbathy.shp
    • lisbathy.shx

    Date: 05-Dec-2001 (process 4 of 4)
    Recoded the depth values from positive to negative and deleted the ArcInfo specific attribute fields.

    Person who carried out this activity:

    Valerie Paskevich
    U.S. Geological Survey
    Computer Specialist, GIS Coordinator
    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:
    • lisbathy.dbf

    Data sources produced in this process:

    • lisbathy.dbf

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:
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, and the Connecticut Department of Environmental Protection, no warranty expressed or implied is made by either agency as to the accuracy of the data.

The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey or Connecticut Department of Environmental Protection in the use of this data.

This information is NOT intended for navigational or legal purposes.

Any use of trade, firm or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

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

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

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

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

    Long Island Sound: lisbathy.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. What hardware or software do I need in order to use the data set?

    The lisbathy 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: 05-Apr-2002

Metadata author:
U.S. Geological Survey
c/o Valerie Paskevich
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 Fri Apr 05 17:29:08 2002