New York Bight and Gulf of Maine bathymetric contours (NY_GOME_CONTOURS)

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Frequently anticipated questions:

What does this data set describe?

Title:
New York Bight and Gulf of Maine bathymetric contours (NY_GOME_CONTOURS)
Abstract:
This bathymetric shapefile contains 10 m contours for the continental shelf and 100 m beyond the 200 m shelf edge. The contours have been derived from the National Oceanic and Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC), Coastal Relief Models volume 1 and 2.
  1. How might this data set be cited?
    U.S. Geological Survey, and Paskevich, Valerie, 2003, New York Bight and Gulf of Maine bathymetric contours (NY_GOME_CONTOURS): Open-File Report 03-001, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science 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, Reston, VA.

    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: -77.208744
    East_Bounding_Coordinate: -64.999984
    North_Bounding_Coordinate: 45.182506
    South_Bounding_Coordinate: 34.999990
  3. What does it look like?
    ny_gome_contours.gif (GIF)
    Image map showing extent and distribution of data layer coverage along the US eastcoast shapefile.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 07-Oct-2002
    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 (10489)
    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 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: unknown
      Altitude_Resolution: 0.000008
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    ny_gome_contours.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.
    elev_m
    Depth values (elevation) recorded as meter values. Depths are recorded as negative values. (Source: Valerie Paskevich)
    Range of values
    Minimum:-4300
    Maximum:-10
    Units:meters
    Resolution:10

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
    • Valerie Paskevich
  2. Who also contributed to the data set?
    Valerie Paskevich for creating the ArcView shapefile and NOAA/NGDC for providing the source information.
  3. To whom should users address questions about the data?
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology Specialist
    384 Woods Hole Road
    Woods Hole, MA
    USA

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

Why was the data set created?

This data overlay is intended to provide a highly detailed bathymetric contour interval for the NY Bight and Gulf of Maine area. The bathymetric shapefile contains 10 m contours for the continental shelf and 100 m intervals beyond the 200m shelf edge. These contours will be used by the Sand and Gravel assessment project to aid in the interpretation and creation of a geologic map of the sedimentary character of the seafloor for the area.

How was the data set created?

  1. From what previous works were the data drawn?
    NGDC Coastal Relief Model, East Coast, Vol 1 (source 1 of 2)
    National Geophysical Data Center, unknown, Coastal Relief Model, East Coast, Vol 1: NGDC Coastal Relief Model volume 1, National Oceanic and Atmospheric Administration, National Geophysical Data Center, Boulder, Co.

    Online Links:

    Type_of_Source_Media: CD-ROM
    Source_Contribution:
    The Volume 1 Coastal Relief Model was combined with Volume 2 to create a raster grid of the US northeast Atlantic.
    NGDC Coastal Relief Model, East Coast, Vol 2 (source 2 of 2)
    National Geophysical Data Center, unknown, Coastal Relief Model, East Coast, Vol 2: NGDC Coastal Relief Model volume 2, National Oceanic and Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC), Boulder, CO.

    Online Links:

    Type_of_Source_Media: CD-ROM
    Source_Contribution:
    A subset of the Volume 2 Coastal Relief Model was combined with Volume 1 to create a raster grid of the US northeast Atlantic north of 35 deg.
  2. How were the data generated, processed, and modified?
    Date: 06-Sep-2001 (process 1 of 13)
    The desired data was extracted from the Coastal Relief Model volumes 1 & 2 in the ESRI ASCII grid format Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • Coastal Relief Model, East Coast vol 1
    • Coastal Relief Model, East Coast vol 2
    Data sources produced in this process:
    • crmvol1.asc
    • crmvol2.asc
    Date: 06-Sep-2001 (process 2 of 13)
    The retrieved data was combined to create a PCI Remote Sensing image database and stored in a 16-bit image channel. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • crmvol1.asc
    • crmvol2.asc
    Data sources produced in this process:
    • bathymetry\NGDC_crm\crmvol12\crm3sec.pix
    Date: 06-Aug-2002 (process 3 of 13)
    The CRM PCI database was processed to extract a subset of the combined dataset. A 5X5 low-pass smoothing filter was applied to the image data to reduce the gridding artifacts. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • bathymetry\NGDC_crm\crmvol12\crm3sec.pix
    Data sources produced in this process:
    • seagrd.pix
    Date: 06-Aug-2002 (process 4 of 13)
    Two additional 16 bit channels were added to the newly created PCI database containing the data subset. The CRM data was processed to create separate land and sea image channels by replacing the values above and below the desired data level with -32768. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • seagrd.pix
    Data sources produced in this process:
    • seagrd.pix
    Date: 06-Aug-2002 (process 5 of 13)
    An image mask of the bathymetry data was created. The XPACE CONTOUR program was run on the CRM data to create a 100m contour segment of the original data. The CRM image was then subsetted to create a bathymetry image with values between 11-200 meters and contoured at 10m. The created contours were then thinned by 50% (VECSEL). Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • seagrd.pix
    Data sources produced in this process:
    • seagrd.pix
    Date: 06-Aug-2002 (process 6 of 13)
    All contours greater than 200 m were removed from the 10 m contour segment to remove redundancy of the 100 m contours before combining the 10 m and 100 m contours as one segment. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • seagrd.pix
    Data sources produced in this process:
    • seagrd.pix
    Date: 13-Aug-2002 (process 7 of 13)
    The bathymetry contours were viewed and edited using Imageworks to verify and improve the dataset. Small contours that were believed to be artifacts of the CRM gridded data were removed. Vector segments that could be combined to produce complete polylines were joined. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • seagrd.pix
    Data sources produced in this process:
    • seagrd.pix
    Date: 27-Sep-2002 (process 8 of 13)
    The final bathymetry contours were exported from the PCI database to an ArcView shapefile. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • seagrd.pix
    Data sources produced in this process:
    • gome_contours.dbf
    • gome_contours.shp
    • gome_contours.shx
    Date: 27-Sep-2002 (process 9 of 13)
    The shapefile was projected from the original WGS84 to NAD83/GRS_1980 for consistency with other datasets. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Technology 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:
    • gome_contours.dbf
    • gome_contours.shp
    • gome_contours.shx
    Data sources produced in this process:
    • ny_gome_contours.dbf
    • ny_gome_contours.shp
    • ny_gome_contours.shx
    Date: 05-Dec-2017 (process 10 of 13)
    Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Added a landing page link as the first link in the identification section. The source information was incomplete and had to be modified to meet the standard. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. Added the online link to the data in the distribution section. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. 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
    Date: 20-Jul-2018 (process 11 of 13)
    USGS Thesaurus keywords added to the keyword section. 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
    Date: 18-Nov-2019 (process 12 of 13)
    Crossref DOI link was added as the first link in the metadata. 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
    Date: 08-Sep-2020 (process 13 of 13)
    Added keywords section with USGS persistent identifier as theme keyword. 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?

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?
    Because details of the creation of the NGDC Coastal Relief model are unknown, the accuracy of the derived bathymetric contours are unknown.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    The data is is complete in as much as the Coastal Relief Model dataset covers the US coastal zone.
  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:
The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.
This dataset is not to be used for navigation purposes.
  1. Who distributes the data set? (Distributor 1 of 1)
    Valerie Paskevich
    U.S. Geological Survey
    GIS Coordinator
    384 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? Downloadable Data; National Assessment of Marine Sand and Gravel Resources: ny_gome_contours.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. 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?
    • Availability in digital form:
      Data format: Shapefile (version ArcView 3.2) ESRI polyline shapefile Size: 40.240
      Network links: https://pubs.usgs.gov/of/2003/of03-001/data/bathymetry/ny_gome_contours.zip
      Media you can order: CD-ROM (Density 650 Mbytes) (format Information unavailable from original metadata.)
      Note: The user must have a computer system with a CD-ROM available. To browse the information contained on this CD-ROM, the user must have a current WWW browser available. The user must also have software installed on their computer 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 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: 16-Nov-2021
Metadata author:
Valerie Paskevich
U.S. Geological Survey
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 or the email is otherwise invalid.
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/ofr2003-001/ny_gome_contours.faq.html>
Generated by mp version 2.9.50 on Tue Nov 16 10:06:29 2021