Gulf of Mexico Bathymetry Contours

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Frequently anticipated questions:

What does this data set describe?

Title: Gulf of Mexico Bathymetry Contours
Abstract:
This GIS overlay is a component of the U. S Geological Survey, Woods Hole Field Center's, Gulf of Mexico ArcView GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.
  1. How might this data set be cited?
    Paskevich, Valerie, 2000, Gulf of Mexico Bathymetry Contours: Open-File Report 2000-19, Coastal and Marine Hazards and Resources Program, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details:
    Gulf of Mexico bathymetric contours, in meters, provided by the USGS Branch of Atlantic Marine Geology's Framework group. These data were digitized by Kim Klitgord in 1982. Valerie Paskevich is the compiler of this dataset.
    This is part of the following larger work.

    Paskevich, Valerie F., 2000, Gulf of Mexico GLORIA sidescan sonar geologic interpretation: ArcView data coverages: Open-File Report 2000-19, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Paskevich, V.F., 2000, Gulf of Mexico GLORIA sidescan sonar geologic interpretation—ArcView data coverages: U.S. Geological Survey Open-File Report 2000-19, https://doi.org/10.3133/ofr0019.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -97.4162
    East_Bounding_Coordinate: -79.5000
    North_Bounding_Coordinate: 29.8168
    South_Bounding_Coordinate: 22.5
  3. What does it look like?
    https://pubs.usgs.gov/of/2000/of00-019/htmldocs/images/browse/bathyc.gif (200m, 1000m, 2000m and 3000m contours of the Gulf of Mexico region)
    GIF
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2000
    Currentness_Reference:
    Publication Date of the Open-FIle Report.
  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):
      • Complete chain (2)
    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 .005. Longitudes are given to the nearest .005. 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 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    bathyc.dbf
    Shapefile Attribute Table (Source: None)
    Fnode_
    From-node identifier of linear feature (Source: Software computed)
    Range of values
    Minimum:0
    Maximum:7
    Tnode_
    To-node identifier of linear feature (Source: Software computed)
    Range of values
    Minimum:0
    Maximum:9
    Lpoly_
    Internal number of polygon to left of arc (Source: Software computed)
    Range of values
    Minimum:0
    Maximum:0
    Rpoly_
    Internal number of polygon to right of arc (Source: Software computed)
    Range of values
    Minimum:0
    Maximum:0
    Length
    Length of line (Source: Software computed)
    Range of values
    Minimum:0.117
    Maximum:23.407
    Bathyc_
    Value from ARC assigned BATHYC# from bathyc.dbf table. Generally has no meaning in ArcView shapefile. (Source: User Defined)
    Range of values
    Minimum:1
    Maximum:23
    Bathyc_id
    Value from ARC assigned BATHYC-ID from bathyc.dbf table. Generally has no meaning in ArcView shapefile. (Source: User Defined)
    Range of values
    Minimum:1
    Maximum:18
    Depth
    Depth contour value, in meters (Source: User Defined)Frequency of measurement: Irregular
    Range of values
    Minimum:200
    Maximum:3000
    Units:meters
    Resolution:50

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Valerie Paskevich
  2. Who also contributed to the data set?
    Kim Klitgord did the digitizing of these contours in 1982.
  3. To whom should users address questions about the data?
    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)
    vpaskevich@usgs.gov
    Hours_of_Service: M-Thu 6:30am-3:30pm; Fri 6:30am-10:30am

Why was the data set created?

This ArcView GIS layer is intended as an illustrative overlay to the Gulf of Mexico. It contains the bathymetric contour lines, in meters, (200, 1000, 2000 and 300) for the Gulf of Mexico area in a polyline format.

How was the data set created?

  1. From what previous works were the data drawn?
    OFR75-140 (source 1 of 2)
    F.S. Sorensen, (comp.), Snodgrass(comp.), L.W., Rebman(comp.), J.H., Murchison(comp.), R.R., Jones(comp.), C.R., and Martin(comp.), Ray G., 19751230, Bathymetric Map of Gulf of Mexico Region: U.S. Geological Survey Open-File Report 75-140, U.S. Geological Survey, U.S. Geological Survey, Reston, VA.

    Online Links:

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 2500000
    Source_Contribution:
    Kim Klitgord did the digitizing of the map. The ASCII data set was later converted to the MAPGEN coast format.
    caribmap (source 2 of 2)
    Case(comp.), J.E., and Holcombe(comp.), T.L., 19801230, Geologic-Tectonic Map of the Caribbean Region: U.S. Geological Survey, U.S. Geological Survey, Reston, VA.

    Online Links:

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 2500000
    Source_Contribution:
    Kim Klitgord did the digitizing of the map. The ASCII data set was later converted to the MAPGEN coast format.
  2. How were the data generated, processed, and modified?
    Date: 01-Dec-1998 (process 1 of 7)
    The digitized Gulf of Mexico bathymetry contour vector information has been stored in a format for use with the U.S. Geological Survey's MAPGEN program. The vector latitude/longitude coordinates were extracted from from the MAPGEN file with the area coordinates of -99.5, 31.1 and -79.5, 22.5 using program getcoast. Person who carried out this activity:
    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)
    vpaskevich@usgs.gov
    Data sources used in this process:
    • MAPGEN coast files
    Data sources produced in this process:
    • bathy.txt
    Date: 06-Oct-1998 (process 2 of 7)
    The ASCII vector file generated from the MAPGEN coast files was imported to PCI Remote Sensing Software's Imageworks program. The vector line was checked for digitizing errors using PCI's Imageworks program. Some editting was done to delete spurious nodes and correct for overshoots and undershoots in the line segments. The modified segment was saved and exported in the ARC export format as bathyc.e00 with the nodes recorded as latitude/longitude as signed decimal degrees. 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:
    • bathyc.txt
    Data sources produced in this process:
    • eez.e00
    Date: 01-Dec-1998 (process 3 of 7)
    The ARC export file, bathyc.e00, was imported to ARC as coverage bathyc. The arc information was verified. No problems were identified. Person who carried out this activity:
    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)
    vpaskevich@usgs.gov
    Data sources used in this process:
    • bathyc.e00
    Data sources produced in this process:
    • bathyc.aat
    Date: 01-Dec-1998 (process 4 of 7)
    The ARC polygon coverage, bathyc.aat, was exported as an ArcView shapefile, bathyc. Person who carried out this activity:
    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)
    vpaskevich@usgs.gov
    Data sources used in this process:
    • bathyc.aat
    Data sources produced in this process:
    • bathyc.dbf
    • bathyc.shp
    • bathyc.shx
    Date: 01-Dec-1998 (process 5 of 7)
    The ArcView shapefile, bathyc, was brought into ArcView for final viewing and verification. No further editting or changes were needed to the shape file. Person who carried out this activity:
    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)
    vpaskevich@usgs.gov
    Data sources used in this process:
    • bathyc.dbf
    • bathyc.shp
    • bathyc.shx
    Data sources produced in this process:
    • bathyc.dbf
    • bathyc.shp
    • bathyc.shx
    Date: 22-Aug-2023 (process 6 of 7)
    Edited the metadata to remove errors flagged by MP. Filled out the citation information including adding the edition, suggested citation, adding the DOI link and a link to the data page. Added USGS Thesaurus and ISO 19115 Topic Category theme keywords. Added the link to the browse graphic. Removed unrequired elements with a value of "unknown". Indicated in some required elements that information was unavailable from the original metadata. Added links to the source citations. Additional small edits to the metadata were made to be consistent with current standards. Updated the distribution liability to an approved FSP disclaimer statement. Updated the distribution format and provided links to the data removing a redundant digital transfer method. The metadata date was updated, but not the metadata contact. The metadata contact email was updated to a valid link with an explanation in the contact instructions (20230822). 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 Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 06-Aug-2024 (process 7 of 7)
    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?
    excellent
  2. How accurate are the geographic locations?
    unknown. Not available from original metadata.
  3. How accurate are the heights or depths?
    unknown. Not available from original metadata.
  4. Where are the gaps in the data? What is missing?
    Not available from the original metadata.
  5. How consistent are the relationships among the observations, including topology?
    Not available from 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 These data are NOT suitable to be used for any navigational or legal purpose. The contour line data are in most cases manually digitized from a variety of published or unpublished maps. These data are accessible for making illustrations only. There is NO ASSURANCE of their accuracy, completeness, or precision.
  1. Who distributes the data set? (Distributor 1 of 1)
    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)
    vpaskevich@usgs.gov
  2. What's the catalog number I need to order this data set? Gulf of Mexico GIS database: bathyc.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 three ArcView shapefiles (bathyc.dbf, bathyc.shp, bathyc.shx) comprising the bathymetric contours (bathyc) coverage. Available as individual file downloads or in a zip file. in format shapefile Size: 1
      Network links: https://pubs.usgs.gov/of/2000/of00-019/data/misc/bathyc.zip
      https://pubs.usgs.gov/of/2000/of00-019/htmldocs/data.htm
      https://doi.org/10.3133/ofr0019
      Media you can order: CD-ROM (Density 650 Mbytes) (format ISO 9600)
      Note: The user must have a system with a CD-ROM capable of reading an ISO-9660 standard CD-ROM disk. To browse the information contained on this disk, the user must also have a current version of WWW browser available.
    • Cost to order the data: none

  5. Is there some other way to get the data?
    not available
  6. What hardware or software do I need in order to use the data set?
    There are no technical requirements for downloading the data. However to use the ArcView shape files the user must have an ESRI software product or some other GIS program that allows importing of ArcView shapefiles.

Who wrote the metadata?

Dates:
Last modified: 06-Aug-2024
Metadata author:
U. S. Geological Survey
Attn: Valerie Paskevich
Computer Specialist
384 Woods Hole Rd.
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 person is no longer with USGS.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (CSDGM version 2)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2000-019/bathyc_meta.faq.html>
Generated by mp version 2.9.51 on Tue Aug 6 15:07:13 2024