PROTRAC_NAD83.SHP - Protraction Diagram Polygons for the Gulf of Mexico OCS

Metadata also available as - [Outline] - [Parseable text]

Frequently-anticipated questions:


What does this data set describe?

Title:
PROTRAC_NAD83.SHP - Protraction Diagram Polygons for the Gulf of Mexico OCS
Abstract:
Outlines of the Protraction Diagrams for the Gulf of the Mexico OCS region.
Supplemental_Information:
The MMS Gulf of Mexico OCS Region stores all its mapping data in longitude and latitude format. Therefore all dumps or files produced will have the coordinates stored in lon/lat format. If the official coordinates (x,y format) are needed, then the Oracle dump of the data must be purchased from MMS.
  1. How should this data set be cited?

    Service(comp.), Minerals Management , 2005, PROTRAC_NAD83.SHP - Protraction Diagram Polygons for the Gulf of Mexico OCS: 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.

    D.C., Twichell, V.A., Cross, 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: -97.336145
    East_Bounding_Coordinate: -81.170106
    North_Bounding_Coordinate: 30.289096
    South_Bounding_Coordinate: 23.780775

  3. What does it look like?

    <http://pubs.usgs.gov/of/2005/1071/data/background/mms/protraction.gif> (GIF)
    Image showing the extent and coverage of the data layer.

  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):

      • G-polygon (94)

    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?

    protrac_nad83
    Shapefile Attribute table (Source: None)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    AREA
    Area of polygon. The Area is carried over from the AREA attribute in ArcInfo. AREA is an ArcInfo internal control parameter and has no relevance to the use of the data. (Source: Software computed)

    Range of values
    Minimum:0.00000
    Maximum:2.06885

    PERIMETER
    Perimeter of polygon. The Perimeter is carried over from the PERIMETER attribute in ArcInfo. PERIMTER is an ArcInfo internal control parameter and has no applicable relevance to the use of the data. (Source: Software Computed)

    Range of values
    Minimum:0.10374
    Maximum:6.75638

    PROTRAC_
    Carried over from the ArcInfo attribute PROTRAC#. PROTRAC# is an ArcInfo internal control parameter and has no applicable relevance to the use of the data. (Source: MMS)

    Range of values
    Minimum:2
    Maximum:95

    PROTRAC_ID
    Carried over from the ArcInfo attribute PROTRAC-ID. PROTRAC-ID is an ArcInfo internal control parameter and has no applicable relevance to the use of the data. (Source: MMS)

    Range of values
    Minimum:1
    Maximum:94

    PROT_NUMBE
    PROT_NUMBER - This is the identifier of an official protraction, which can be one of two types as utilized by the an Official Protraction Diagram (OPD) or Leasing Map. (Source: MMS)

    Character field

    MMS_REGION
    MMS_REGION_CODE - a unique identifier for the Minerals Management Service (MMS) Outer Continental Shelf. (Source: MMS)

    Character field

    PROT_APRV_
    PROT_APRV_DATE - the date the Official Protraction Diagram or Leasing Map is signed by the Federal Government and approved for distribution. (Source: MMS)

    Character field

    Entity_and_Attribute_Overview:
    Contains the information that defines a composite polygon of the areas of the Official Protraction Diagrams (OPD) for the Gulf of Mexico region.
    Entity_and_Attribute_Detail_Citation:
    Minerals Management Service Gulf of Mexico OCS Region Geographic Mapping Data


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?

    Minerals Management Service Public Information (MS 5034) 1201 Elmwood Park Boulevard New Orleans, LA 70123-2394

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

    Minerals Management Service
    Gulf of Mexico OCS Region
    Public Information (MS 5034) 1201 Elmwood Park Boulevard
    New Orleans, LA 70123-2394

    1-800-200-GULF (voice)
    (504) 736-2620 (FAX)
    GulfPublicInfo@smtp.mms.gov


Why was the data set created?

Contains information that defines the composite polygons of the areas for the Gulf of Mexico region. This file is based on the OCS Marine Survey Group Official Protraction Diagram (ODP). Each offshore area is defined by an API Number corresponding to those in the API Bulletin Number D12A.


How was the data set created?

  1. From what previous works were the data drawn?

    protracx.e00 (source 1 of 1)
    Service, Minerals Management , 20040510, 8207 PROTRACTIONS - Geographic Mapping Data in Digital Format.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    Contains information that defines a composite polygon of the areas for the GOM Region. This file is based on the OCS Marine Survey Group Official Protraction Diagram (OPD). Each offshore area is defined by an API Number corresponding to those in the API Bulletin Number D12A.

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

    (process 1 of 5)
    The source file was downloaded from the Minerals Management Service website. The file was then uncompressed using WinZip and saved as protracex.e00

    Person who carried out this activity:

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

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

    Data sources used in this process:
    • protraex.zip

    Data sources produced in this process:

    • protracex.e00

    (process 2 of 5)
    The protracex.e00 file was converted to a shape file by using the ESRI/ArcView/Import71 option of ArcView (v. 8.3).

    Person who carried out this activity:

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

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

    Data sources used in this process:
    • protracex.e00

    Data sources produced in this process:

    • protracex.shp

    (process 3 of 5)
    The shapefile was projected to its original projection: geographic, NAD 27. The projection was defined using the "Define Projection Wizard" of ArcToolbox which is part of the ESRI product, ArcGIS.

    Data sources used in this process:

    • protracex.shp

    Data sources produced in this process:

    • protrac_nad27.shp

    (process 4 of 5)
    The shapefile was converted from geographic, NAD27, to geographic, NAD83. The conversion was completed using the "Project Wizard" of ArcToolbox which is part of the ESRI product, ArcGIS.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o David Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x 2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

    Data sources used in this process:
    • protrac_nad27.shp

    Data sources produced in this process:

    • protrac_nad83.shp

    Date: 2005 (process 5 of 5)
    The attribute field Ac_lab was deleted because the attribute was undefined, and this field was not included in the description that accompanied the original data set from MMS.

    Person who carried out this activity:

    David Twichell
    U.S. Geological Survey
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x 2266 (voice)
    508-457-2310 (FAX)
    dtwichell@usgs.gov

    Data sources used in this process:
    • protrac_nad83.shp

    Data sources produced in this process:

    • protrac_nad83.shp

  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?

    This is the complete file as downloaded from the Minerals Management Gulf of Mexico Outer Continental Shelf (OCS) website.

  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.

  1. Who distributes the data set? (Distributor 1 of 2)

    Minerals Management Service
    Gulf of Mexico OCS Region
    Public Information (MS 5034)
    New Orleans, Louisiana 70123-2394
    USA

    1-800-200-GULF (voice)
    (504) 736-2620 (FAX)
    GulfPublicInfo@smtp.mms.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?

    This accessible computer data is from a working database maintained by the Minerals Management Service (MMS) which is derived by entering data from documents submitted to the Federal Government from oil companies, other Government Agencies, and/or the public. Some errors may exist in this data and the Minerals Management Service is constantly working to find and eliminate them. Copies of the original documents are available for your inspection and copying at the MMS Public Information Office. This computer data is not intended as a legal document and should not be constructed as such. This data is not for navigational use. If you discover problems with this data, please advise MMS and they will address this in their priority schedule to correct the data. GulfPublicInfo@smtp.mms.gov to report such discrepancies.

  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) '.e00' 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.


  1. Who distributes the data set? (Distributor 2 of 2)

    United States Geological Survey
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

  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 data set has been used by the U.S. Geological Survey (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.

    This accessible computer data as a copy of a dataset available from the Minerals Management Service (MMS) website (www.mms.gov). Please refer to their website for detailed information. This computer data is not intended as a legal document and should not be constructed as such. This data is not for navigational use. If you discover problems with this data, please advise MMS and at GulfPublicInfo@smtp.mms.gov to report such discrepancies.

  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 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 importing data. A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com.

    You must have a program such as pkzip or winzip to decompress the archived data files.


Who wrote the metadata?

Dates:
Last modified: 08-Apr-1999
Last Reviewed: 07-Jan-2004
Metadata author:
U.S. Geological Survey
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

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

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.8.6 on Fri Jan 20 11:49:36 2006