National Petroleum Reserve - Alaska Boundary (Polygon) NAD83

Metadata also available as

Frequently anticipated questions:


What does this data set describe?

Title: National Petroleum Reserve - Alaska Boundary (Polygon) NAD83
Abstract:
National Petroleum Reserve - Alaska Boundary
Formerly known as the Naval Petroleum Reserve No. 4, the 23-million acre area on Alaska's North Slope has a history of nearly 100 years of petroleum exploration. In 1923, mindful of the land's conceivable petroleum value, President Harding set aside these 23 million acres as an emergency oil supply for the U.S. Navy. In 1976, in accordance with the Naval Petroleum Reserve Production Act, the administration of the reserve was transferred to the Department of the Interior, more specifically the Bureau of Land Management, and was renamed to what is now known as the National Petroleum Reserve-Alaska (NPR-A).
The NPRA Boundary (arcs) are a composite of 6 sets of arcs that define the exterior boundary of the reserve.
Supplemental_Information:
1. Spatial Data Management System bearings and distances for NPRA -1836 arcs
2. High, High Water Line within USS 9571 - one arc
3. Connecting Line Between MC2, T11N, R39W and the point of intersection of the administrative lease line of the N.P.R.A. and the surveyed W. bdy. of the N.P.R.A. - one arc
4. Southern boundary of the N.P.R.A. from a point in unsurveyed township Sec19, T31N, R13E, KRM northeasterly along the Continental Divide to Closing Corner 1, T11S, R43W, UM - one arc
5. Final Administrative Lease Line of the National Petroleum Reserve - Alaska (administrative lease line) - one arc made up of 8011 points of Latitude and Longitude
6. Connecting Line Between SDMS cor_id 146914 - MC12 on E BDY, T2S, R3W, UM;MC5 on W BDY, T2S, R2W, UM AND SDMS cor_id 136696 - MC14 on N BDY, T2S, R2W, UM;MC7 on S BDY, T1S, R2W, UM. (Objectid = 1841)
  1. How should this data set be cited?

    Bureau of Land Management, 20121217, National Petroleum Reserve - Alaska Boundary (Polygon) NAD83.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -161.875561
    East_Bounding_Coordinate: -150.910280
    North_Bounding_Coordinate: 71.389954
    South_Bounding_Coordinate: 68.067765

  3. What does it look like?

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

    Calendar_Date: 17-Dec-2012
    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 (0)

    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 0.000000000000178. Longitudes are given to the nearest 0.000000000000178. 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?

    npra_boundary_arcs_gcsnad27
    Arcs that describe the exterior boundary of the NPRA (Source: BLM)

    shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    objectid
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.


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?

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

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


Why was the data set created?

Arcs used to create the NPRA (polygon) Boundary.


How was the data set created?

  1. From what previous works were the data drawn?

    none (source 1 of 3)
    Bureau of Land Management, 20071024, National Petroleum Reserve Alaska - Administrative Coastal Boundary Points.

    Online Links:

    • Server=ilmakso0db3; Service=5155; Database=base_data; User=sde; Version=sde.DEFAULT

    Type_of_Source_Media: ArcSDE Arc Feature Class - digital data
    Source_Contribution: Bureau of Land Management

    none (source 2 of 3)
    Bureau of Land Management, 20071101, Spatial Data Management System Line Layer, Surveyed Lines, Alaska.

    Online Links:

    • Server=ilmakso0db3; Service=5151; Database=sdms_prod; User=sde; Version=sde.DEFAULT

    Type_of_Source_Media: ArcSDE Arc Feature Class - digital data
    Source_Contribution: Bureau of Land Management

    none (source 3 of 3)
    Bureau of Land Management, 2012, Watershed Boundary Dataset.

    Online Links:

    • none

    Type_of_Source_Media: ArcInfo Coverage - Arc Feature Class - digital data
    Source_Contribution: Bureau of Land Management

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

    Date: 17-Dec-2012 (process 1 of 3)
    Arcs were copied/created from 6 source data layers.
    Arcs were copied/created from:
    1. High, High Water Line within USS 9571 a. One arc b. Created from rectangular survey plat
    2. Connecting Line Between MC2, T11N, R39W and the point of intersection of the administrative lease line of the N.P.R.A. and the surveyed W. bdy. of the N.P.R.A. a. One arc b. Created from snapping line along rectangular survey to points described above.
    3. Southern boundary of the N.P.R.A. from a point in unsurveyed township Sec19, T31N, R13E, KRM northeasterly along the Continental Divide to Closing Corner 1, T11S, R43W, UM a. Arcs abstracted from Watershed Boundary Dataset along continental divide at southern end of the NPR-A. Arcs snapped to fixed N/S boundaries.
    4. Final Administrative Lease Line of the National Petroleum Reserve - Alaska (administrative lease line) a. One arc created from 8011 points b. Arc Copied from npra_admin_coastal_bndy
    5. Spatial Data Management System - 1836 arcs a. 1836 arcs copied from SDMS Surveyed boundaries
    6. Connecting Line Between SDMS cor_id 146914 - MC12 on E BDY, T2S, R3W, UM;MC5 on W BDY, T2S, R2W, UM AND SDMS cor_id 136696 - MC14 on N BDY, T2S, R2W, UM;MC7 on S BDY, T1S, R2W, UM. (Objectid = 1841)

    Person who carried out this activity:

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

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

    Data sources used in this process:
    • Server=ilmakso0db3; Service=5151; Database=sdms_prod; User=sde; Version=sde.DEFAULT

    Date: 17-Dec-2012 (process 2 of 3)
    Dataset copied.

    Data sources used in this process:

    • Server=ilmakso0db3; Service=5155; Database=base_data; User=sde; Version=sde.DEFAULT

    Date: 17-Dec-2012 (process 3 of 3)
    Dataset copied.

    Data sources used in this process:

    • Server=ilmakso0db3; Service=5155; Database=base_data; User=sde; Version=sde.DEFAULT

  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?

    Line attributes exist only for data abstracted from SDMS line data.

  2. How accurate are the geographic locations?

    Line topology exists

  3. How accurate are the heights or depths?

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

    Complete - no omissions.

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

    Arc 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)

    Tim Varner
    Bureau of Land Management
    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: 17-Dec-2012
Last Reviewed: 17-Dec-2012
To be reviewed: 17-Dec-2013
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 Sep 28 14:42:15 2017