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

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Frequently anticipated questions:

What does this data set describe?

Title:
1 m Digital Bathymetric Contours from NOAA Charts as Organized for the LISSGIS Library (LISBATHY)
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 might this data set be cited?
    DiGiacomo-Cohen, Mary L., Tedesco, Mark, and Polloni, Chris, 2002, 1 m Digital Bathymetric Contours from NOAA Charts as Organized for the LISSGIS Library (LISBATHY): U.S. Geological Survey 2002-002, 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, 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: -73.936708
    East_Bounding_Coordinate: -71.999687
    North_Bounding_Coordinate: 41.499656
    South_Bounding_Coordinate: 40.769513
  3. What does it look like?
    https://pubs.usgs.gov/of/2002/0002/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 0.0000001. 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?
    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
    Polylineinformation unavailable from original metadata
    Coordinates defining the features.
    LENGTH
    Length of vector segment in native units. (Source: information unavailable from original metadata)
    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)
    • Mary L. DiGiacomo-Cohen
    • Mark Tedesco
    • Chris Polloni
  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
    Attn: Larry Poppe
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    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?
    information not available from original metadata (source 1 of 4)
    National Oceanic and Atmospheric Administration, 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.
    information not available from original metadata (source 2 of 4)
    National Oceanic and Atmospheric Administration, 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.
    information not available from original metadata (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.
    information not available from original metadata (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 5)
    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
    Attn: Linda Bischoff
    GIS Analyst
    100 Franklin St.
    Boston, MA
    USA

    (617) 292-7125 (voice)
    (617) 292-7911 (FAX)
    info@appgeo.com
    Date: Unknown (process 2 of 5)
    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
    USA

    860-405-9015 (voice)
    lisrc@uconnvm.uconn.edu
    Data sources produced in this process:
    • lisbathy.e00
    Date: 27-Nov-2001 (process 3 of 5)
    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
    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 5)
    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
    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
    Date: 19-Aug-2024 (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 (20020405), 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. (20210818). Replaced all links to data using woodshole.er with the appropriate working link. Fixed the browse graphic broken link. (20240819). 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?
    Poppe, Lawrence J., and Polloni, Christopher F., 1998, Long Island Sound Environmental Studies: U. S. Geological Survey Open-File Report 98-502, U. S. Geological Survey, Woods Hole Field Center, Woods Hole, MA.

    Online Links:

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?
    Information unavailable from the original metadata
  5. How consistent are the relationships among the observations, including topology?
    Information unavailable from the original metadata

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
    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?
    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 (lisbathy.dbf, lisbathy.shp, lisbathy.shx, lisbathy.sbn, lisbathy.sbx, lisbathy.avl, lisbathy.prj) comprising the the 1 meter bathymetric contours for Long Island Sound and an ASCII version of the metadata. in format ArcView shapefile (version 3.2) Size: 1
      Network links: https://doi.org/10.3133/ofr022
      https://pubs.usgs.gov/of/2002/0002/data/bathy/lisbathy.zip
      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. 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: 19-Aug-2024
Metadata author:
U.S. Geological Survey
Attn: Valerie Paskevich
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/lisbathy_meta.faq.html>
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