Authorized Oil and Gas Leases within the National Petroleum Reserve - Alaska

Metadata also available as

Frequently anticipated questions:


What does this data set describe?

Title:
Authorized Oil and Gas Leases within the National Petroleum Reserve - Alaska
Abstract:
Authorized Oil and Gas Leases within the National Petroleum Reserve - Alaska
Includes 1999, 2002, 2004, 2006, 2008, 2010, 2011, 2012 Lease Sale Tracts.
  1. How should this data set be cited?

    Bureau of Land Management, 20130221, Authorized Oil and Gas Leases within the National Petroleum Reserve - Alaska.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -157.550763
    East_Bounding_Coordinate: -150.972011
    North_Bounding_Coordinate: 71.314878
    South_Bounding_Coordinate: 69.088503

  3. What does it look like?

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

    Calendar_Date: 21-Feb-2013
    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 (262)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Albers Conical Equal Area.

      Projection parameters:
      Standard_Parallel: 55.000000
      Standard_Parallel: 65.000000
      Longitude_of_Central_Meridian: -154.000000
      Latitude_of_Projection_Origin: 50.000000
      False_Easting: 0.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000100
      Ordinates (y-coordinates) are specified to the nearest 0.000100
      Planar coordinates are specified in meters

      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_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    npra_authorized_lease_tracts
    Authorized oil and gas lease sales within the NPRA (Source: BLM)

    shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    case_ser_num
    Oil and gas serialized case file number (Source: BLM Alaska Land Information System)

    Formal codeset
    Codeset Name:Alaska Land Information System
    Codeset Source:BLM Alaska

    valid_case_type_desc_txt

    year_
    Lease Sale Year (Source: BLM)

    ValueDefinition
    19991999 Oil and Gas Leases
    20022002 Oil and Gas Leases
    20042004 Oil and Gas Leases
    20062006 Oil and Gas Leases
    20082008 Segregations of 1999 Oil and Gas Leases OR 2008 Oil and Gas Leases
    20102010 Oil and Gas Lease

    status_date
    Date status was abstracted from Alaska Land Information System (Source: BLM)

    Date status was abstracted from ALIS

    tract
    Oil and Gas Lease Tract ID or Geoname (Source: BLM Alaska Land Information System)

    Varies

    objectid
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    SE_Area(shape)

    SE_Length(shape)


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?

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

    Bureau of Land Management
    Attn: Carol Taylor
    Mineral Law Specialist
    22 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271-4402 (voice)
    Carol_Tyalor@ak.blm.gov


Why was the data set created?

Authorized oil and gas leases layer provides a graphic display of the oil and gas leases from the 1999, 2002, 2004, 2006, 2008 segregations of the 1999 leases, 2008, 2010, 2011, 2012 lease sales.
Provides a graphic display of the authorized oil and gas leases for planning, mapping, calculating acreage, as well as for visual inspection of the authorized leases.


How was the data set created?

  1. From what previous works were the data drawn?

    none (source 1 of 2)
    Bureau of Land Management, 20061208, Protracted Section Grid for Alaska (NAD83).

    Type_of_Source_Media: ArcSDE Feature Class - spatially-enabled Informix Table
    Source_Scale_Denominator: 1000
    Source_Contribution: Bureau of Land Managment

    none (source 2 of 2)
    Bureau of Land Management, 20071104, National Petroleum Reserve Alaska Boundary (Polygon) NAD83.

    Type_of_Source_Media: ArcSDE Feature Class - spatially-enabled Informix Table
    Source_Scale_Denominator: 1000
    Source_Contribution: Bureau of Land Management

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

    Date: 21-Feb-2013 (process 1 of 1)
    1. Queried township/section, case serial number, case status, geoname, and year from Alaska Land Information System database. 2. Created definition query using ArcMap to eliminate protracted sections that were not authorized oil and gas leases in NPRA. 3. Dissolved leases by case serial number, geoname, and year. 4. Clipped dissolved layer using the NPRA Boundary.

    Person who carried out this activity:

    Bureau of Land Management
    Attn: Tim Varner
    IT Specialist
    222 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271-5799 (voice)
    tvarner@blm.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?

    Attributes were cross-tablulated against source Alaska Land Information System tables. Any errors or omissions were tracted back to source and corrected in the source data. Final results are a one-to-one representation of the source data.

  2. How accurate are the geographic locations?

    Horizontal accuracy of proposed lease sale based on protracted section grid and the boundary of the NPRA

  3. How accurate are the heights or depths?

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

    Dataset is complete and verified.

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

    Polygon topology exists.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
Discretionary, contains no sensitive information - generally considered releasable.
Use_Constraints:
Any hardcopies or published datasets using this data shall clearly indicate their source.
Any users wishing to modify this data are obligated to report the extent of their modifications. User specifically agrees not to misrepresent modifications to this data, as approved or endorsed by the BLM.

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

    Bureau of Land Management
    Attn: Tim Varner
    IT Specialist
    222 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271-5799 (voice)
    tvarner@blm.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?

    No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 21-Feb-2013
Last Reviewed: 21-Feb-2013
To be reviewed: 21-Feb-2014
Metadata author:
Bureau of Land Management
Attn: Tim Varner
IT Specialist
222 W. 7th Ave. #13
Anchorage, ak 99513
USA

(907) 271-5799 (voice)
tvarner@blm.gov

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


Generated by mp version 2.9.12 on Thu Mar 09 14:06:52 2017