BLM Administrative Unit Boundaries Feature Dataset

Frequently-asked questions:


What does this data set describe?

Title:
BLM Administrative Unit Boundaries Feature Dataset

Abstract:
Feature Dataset for BLM Administrative Unit Boundaries Data Standard

Supplemental information:
A Bureau of Land Management (BLM) Administrative Unit is a geographic area in which an organizational unit of the BLM has distinct jurisdictional responsibility for land and resource management activities occurring on the public lands, the maintained rights of the United States (i.e. mineral estate) and actions relating to the Trust responsibilities of the U.S. Government as stipulated in Law or Treaty.

  1. How should this data set be cited?

    Bureau of Land Management, REQUIRED: The date when the data set is published or otherwise made available for release., BLM Administrative Unit Boundaries Feature Dataset .

    Online links:
  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: REQUIRED: Western-most coordinate of the limit of coverage expressed in longitude.
    East: REQUIRED: Eastern-most coordinate of the limit of coverage expressed in longitude.
    North: REQUIRED: Northern-most coordinate of the limit of coverage expressed in latitude.
    South: REQUIRED: Southern-most coordinate of the limit of coverage expressed in latitude.

  3. What does it look like?

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

    Calendar date: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.
    Currentness reference:
    REQUIRED: The basis on which the time period of content information is determined.

  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 (0)
      • String (0)
      • Entity point (0)
      • G-polygon (0)
      • 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 0.000000. 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.

      Vertical coordinate system definition:
      Altitude system definition:
      Altitude resolution: 0.000100
      Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    admu_ofc_pt
    admu_ofc_arc
    admu_hist_ofc_pt
    admu_hist_ofc_poly
    admu_ofc_poly
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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?

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Why was the data set created?

This feature data set covers both BLM administrative land areas and office locations.  Land areas are depicted with polygons for the smallest administrative unit (field offices).  Larger administrative units, such as district offices, and administrative states may be derived from these polygons.

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How was the data set created?

  1. Where did the data come from?

  2. What changes have been made?

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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?

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

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How can someone get a copy of the data set?

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

Access constraints: None. This is considered public data.
Use constraints:
No liability is assumed for the current accuracy or utility of the data on any system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty for individual or aggregate data use with other data.  The BLM shall not be held liable for improper use of the data described and/or contained herein.  By using this data you hereby agree to these conditions.

Any hardcopies utilizing these datasets shall clearly indicate their source.  If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map.  Licensee specifically agrees neither to misrepresent these datasets nor to imply that changes they made were approved by the BLM.

Distributor 1 of 1

  1. Who distributes the data set?

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

  5. Is there some other way to get the data?

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

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Who wrote the metadata?

Dates:
Last modified: 20101202

Metadata author:
REQUIRED: The person responsible for the metadata information.
REQUIRED: The organization responsible for the metadata information.
REQUIRED: The city of the address., REQUIRED: The state or province of the address. REQUIRED: The ZIP or other postal code of the address.

REQUIRED: The telephone number by which individuals can speak to the organization or individual. (voice)

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

Metadata extensions used:
  • http://www.esri.com/metadata/esriprof80.html

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