GOMNAMES.SHP - Gulf of Mexico features names

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Frequently-anticipated questions:

What does this data set describe?

Title: GOMNAMES.SHP - Gulf of Mexico features names
Abstract:
This GIS overlay is a component of the U.S. Geological Survey, Woods Hole Science 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.
Supplemental_Information:
This ArcView shapefile was created from a Microsoft Excel spread sheet that was found at the National Oceanic and Atmospheric Administration, National Geophysical Data Center's website. The information contained in the spread sheet was edited to include only those features that would pertain to the planned Gulf of Mexico Internet Map Server for the USGS, Woods Hole Science Center. Therefore, this is not a complete listing as would be found from NOAA-NGDC.
  1. How should this data set be cited?

    Paskevich, Valerie, 2005, GOMNAMES.SHP - Gulf of Mexico features names: Open-File Report 2005-1071, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Twichell, D.C., Cross, V..A., Paskevich, V.F., Hutchinson, D.R., Winters, W.J., and Hart, P.E., 2005, GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey: Open-File Report 2005-1071, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -97.500177
    East_Bounding_Coordinate: -79.916429
    North_Bounding_Coordinate: 31.000234
    South_Bounding_Coordinate: 23.500362

  3. What does it look like?

    <http://www.ngdc.noaa.gov/mgg/ibcca/html/images.htm> (JPEG)
    Undersea Feature Name Image

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

    Calendar_Date: 2005
    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 (254)

    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 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.

  7. How does the data set describe geographic features?

    gomnames
    Shapefile Attribute Table (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Range of values
    Minimum:223083
    Maximum:231080

    LON
    Longitude coordinate of feature recorded in decimal degrees. (Source: USGS)

    Range of values
    Minimum:-97.5000
    Maximum:-79.91667
    Units:decimal degrees

    LAT
    Latitude coordinate of feature recorded in decimal degrees (Source: USGS)

    Range of values
    Minimum:23.50000
    Maximum:31.00000
    Units:decimal degrees

    NAME
    Name of feature. (Source: USGS)

    Character field

    TYPE
    Type of feature. List includes features such as bank, basin, canyon, dome, escarpment, gap, hill, knoll, mesa, mound, plain, reef, ridge, seamount, shelf, shoal, slope, spur, terrace, trough, valley (Source: USGS)

    Character field

    LATITUDE
    This field contains the latitude coordinate of the feature as a character field. (Source: USGS)

    Character field

    LONGITUDE
    This field contains the longitude coordinate of the feature as a character field. (Source: USGS)

    Character field

    CODE
    Code assigned by NOAA-NGDC. Origin and meaning unknown. (Source: USGS)

    Range of values
    Minimum:0
    Maximum:231080

    SOURCE
    Source of feature name. (Source: USGS)

    Character field

    COMMENTS
    Additional comments regarding the name and/or source of the seafloor (Source: USGS)

    Character field

    ORIGIN
    Origin of the name for the feature. (Source: USGS)

    Character field

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?

    Please recognize NOAA - National Geophysical Data Center (NGDC), Marine Geology & Geophysics & World Data Center A for MGG as the originator of the source data used to create this GIS data layer.

  3. To whom should users address questions about the data?

    Valerie Paskevich
    U.S. Geological Survey
    Information 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

Why was the data set created?

This ArcView shapefile an additional GIS overlay. It contains the names of various seafloor features (basins, slopes, knolls, ridges, etc.) for the Gulf of Mexico.

How was the data set created?

  1. From what previous works were the data drawn?

    ib1234gz.xls (source 1 of 1)
    National Oceanic and Atmospheri, National Geophysical Data Center, 1999, ib1234gz.xls - Microsoft Excel spreadsheet containing names and location of Gulf of Mexico features.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    Spreadsheet contains seafloor feature names, general classification for the type of feature, latitude and longitude coordinate of feature, numeric code, source of feature name and additional comments relating to the name and source of feature name.

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

    Date: 14-Jun-1999 (process 1 of 4)
    The Microsoft Excel data file was downloaded from the NOAA-NGDC site and read into Excel. Records that did not contain a latitude/longitude coordinate for a feature name was deleted from the spreadsheet. The text fields containing the latitude and longitude coordinate of the seafloor feature were then copied and added to the spreadsheet as the first two fields. These fields were added so numeric latitude longitude fields recorded as signed decimal degrees could be created later. The modified spreadsheet was saved as a comma separated values text file.

    Person who carried out this activity:

    Valerie Paskevich
    U.S. Geological Survey
    Information Specialist / GIS Coordinator
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • ib1234gz.xls

    Data sources produced in this process:

    • gomnames.csv

    Date: 14-Jun-1999 (process 2 of 4)
    The comma separated values file was processed on a UNIX operating system to convert the first two text fields that contained the feature coordinates to numeric, signed decimal degree fields.

    Person who carried out this activity:

    Valerie Paskevich
    U.S. Geological Survey
    Information Specialist / GIS Coordinator
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • gomnames.csv

    Data sources produced in this process:

    • gomnames.txt

    Date: 14-Jun-1999 (process 3 of 4)
    The text file with geographic coordinates was read into ArcView as a table. Features locations that did not fall within the bounds of the Gulf of Mexico IMS were eliminated, and the remaining table information was converted to an ArcView shapefile.

    Person who carried out this activity:

    Valerie Paskevich
    U.S. Geological Survey
    Information Specialist / GIS Coordinator
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • gomnames.txt

    Data sources produced in this process:

    • gomnames.shp

    Date: 07-Jan-2004 (process 4 of 4)
    The data were projected from geographic NAD27, to geographic NAD83.

    Person who carried out this activity:

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

    508-548-8700 (voice)
    508-457-2310 (FAX)

  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?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    Data records without geographic coordinates were deleted from the original dataset prior to creating the GIS data layer.

  5. How consistent are the relationships among the observations, including topology?

    No additional checks for topological consistency were performed on the 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:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

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

    U.S. Geological Survey
    c/o Valerie Paskevich
    Information 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

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

    Downloadable Data.

  3. What legal disclaimers am I supposed to read?

    Although this derived data set has 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.

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

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS® or ArcView® 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of the importing data. A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com.

Who wrote the metadata?

Dates:
Last modified: 30-Jan-2006
Last Reviewed: 07-Jan-2004
Metadata author:
Valerie Paskevich
U.S. Geological Survey
Information Specialist / GIS Coordinator
384 Woods Hole Rd.
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)
Metadata extensions used:

Generated by mp version 2.8.6 on Mon Jan 30 13:47:50 2006