LEASEBLK_NAD83.SHP - Gulf of Mexico OCS Lease Blocks

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

Frequently-anticipated questions:


What does this data set describe?

Title: LEASEBLK_NAD83.SHP - Gulf of Mexico OCS Lease Blocks
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. Additional GIS overlays downloaded from the WWW, such as the one described here, are also included in the Gulf of Mexico GIS database. Attempts to properly attribute such GIS overlays with the WWW address and data compilers has been made.
Supplemental_Information:
The Minerals Management Service 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 , 19970326, LEASEBLK_NAD83.SHP - Gulf of Mexico OCS Lease Blocks: 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: -97.336145
    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/leaseblocks.gif> (GIF)
    Image showing extent and coverage of lease blocks data layer in the Gulf of Mexico.

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

    Calendar_Date: 26-Mar-1997
    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 (29539)

    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?

    leaseblk_nad83
    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.

    AREA
    Area of polygon in native units (Source: Software Computed)

    PERIMETER
    Perimeter of polygon in native units (Source: MMS)

    BLOCKS_
    BLOCKS# - This is an ArcInfo internal control parameters and has no applicable relevance to the use of the data. (Source: MMS)

    BLOCKS_ID
    BLOCKS-ID - This is an ArcInfo internal control parameters and has no applicable relevance to the use of the data. (Source: MMS)

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

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

    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)

    BLOCK_NUMB
    BLOCK_NUMBER - Identifies a subdivision of an Official Protraction Diagram. (Source: MMS)

    BLK_FED_AP
    BLK_FED_APRV_DT - The date that the OCS Block was established. (Source: MMS)

    BLOCK_LAB
    BLOCK_LAB - Left justified BLOCK_NUMBER. (Source: MMS)

    AC_LAB
    AC_LAB - This column is a concatenated field. The first two characters contain the area code and the remaining characters contain the block number. (Source: MMS)

    Entity_and_Attribute_Overview:
    Contains information that defines the Federal lease blocks for the Gulf of Mexico Outer Continental Shelf (OCS) 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)
    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 the information that defines the Federal lease blocks for the Gulf of Mexico OCS region.


How was the data set created?

  1. From what previous works were the data drawn?

    8201ARC.ZIP (leaseblk.e00) (source 1 of 1)
    Service, Minerals Management , 20040510, BLOCKS - Geographic Mapping Data in Digital Format.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    Contains information that defines the Federal lease blocks for the Gulf of Mexico, Outer Continental Shelf (OCS) Region.

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

    (process 1 of 3)
    The leaseblk.e00 file was converted to a shape file by using the ESRI/ArcView/Import71 option of ArcView

    Person who carried out this activity:

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

    (508) 548-8700 x 2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov

    Data sources used in this process:
    • leaseblk.e00

    Data sources produced in this process:

    • leaseblk.shp

    Date: 05-Oct-1999 (process 2 of 3)
    The shapefile was defined to its original projection: geographic, NAD 27. The projection was defined using the "Projection Utility" of ArcView which is part of the ESRI product, ArcGIS.

    Person who carried out this activity:

    Valerie Paskevich
    US Geological Survey
    Information Specialist / GIS Coordinator
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x 2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov

    Data sources used in this process:
    • leaseblk.shp

    Data sources produced in this process:

    • leaseblk.shp

    Date: 13-Dec-2004 (process 3 of 3)
    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:

    US 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:
    • leaseblk.shp

    Data sources produced in this process:

    • leaseblk_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 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:
These data are NOT to be used for legal purposes,

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.

This accessible computer data is from a working database 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 and MMS will address this in their priority schedule to correct the data. Contact MMS at GulfPublicInfo@smtp.mms.gov to report such discrepancies.

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

    Minerals Management Service
    Gulf of Mexico OCS Region
    Public Information (MS 5034)
    New Orleans, LA 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.

    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.

  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.

    The user must have a program such as pkzip or winzip to decompress the archived data files from MMS.


  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?

    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.

    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.

  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: 08-Apr-1999
Last Reviewed: 19-Dec-2003
Metadata author:
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

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 11:49:28 2006