BLM Alaska Field Offices

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Frequently anticipated questions:


What does this data set describe?

Title: BLM Alaska Field Offices
Abstract:
This dataset is the official representation of the BLM Field and District office boundaries in Alaska. This dataset was screen digitized by hand from information provided by personnel at the Anchorage, Glennallen and Fairbanks offices.
Representatives from the respective offices agreed on the official boundaries and this information was provided to the state office in the form of shapefiles or geodatabases where they were compiled into one dataset.
  1. How should this data set be cited?

    Bureau of Land Management, 20150109, BLM Alaska Field Offices.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -154.003945
    East_Bounding_Coordinate: -153.998984
    North_Bounding_Coordinate: 49.999834
    South_Bounding_Coordinate: 49.999651

  3. What does it look like?

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

    Calendar_Date: 09-Jan-2015
    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 (37342)

    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 0.1
      Ordinates (y-coordinates) are specified to the nearest 0.1
      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.

  7. How does the data set describe geographic features?

    BLM_Alaska_Field_Offices
    BLM Field Office Boundaries (Source: BLM Alaska)

    shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    district
    BLM District Office (Source: BLM Alaska)

    ValueDefinition
    Anchorage Distict OfficeAnchorage Distict Office
    Fairbanks Distict OfficeFairbanks Distict Office

    FieldOff
    BLM Field Office (Source: BLM)

    ValueDefinition
    Anchorage Field OfficeAnchorage Field Office
    Glennallen Field OfficeGlennallen Field Office
    Eastern Interior Field OfficeEastern Interior Field Office
    Central Yukon Field OfficeCentral Yukon Field Office
    Arctic Field OfficeArctic Field Office


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: Lynette Nakazawa
    Chief Branch of GIS and Mapping
    222 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271-3274 (voice)
    Lynette_Nakazawa@blm.gov


Why was the data set created?

This dataset was generated to be the official spatial record of the BLM Field Office boundaries in Alaska. It is intended to be used for general mapping purposes


How was the data set created?

  1. From what previous works were the data drawn?

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

    Date: 14-Dec-2006 (process 1 of 2)
    Screen digitized from township/section grid and other geographic features following information provided by office personnel.
    Each district office representative agreed on the resulting boundaries.
    Where the boundary followed section or township lines it was snapped to the BLM Sections NAD83 Grid.
    The boundary was then unioned with the Alaska Coastline 1 to 63360 poly
    Field Office Boundaries were dissolved by district office and field office values into 5 multipolygon features for 1. Anchorage District Office, Anchorage Field Office; 2. Anchorage District Office, Glennallenn Field Office; 3. Fairbanks District Office, Arctic Field Office; 4. Fairbanks District Office, Central Field Office; 5. Fairbanks District Office, Eastern Field Office.

    Person who carried out this activity:

    Bureau of Land Management
    222 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271 -3274 (voice)
    Lynette_Nakazawa@blm.gov

    Date: 09-Jan-2015 (process 2 of 2)
    The transfer of the eastern portion of Nulato Hills, including all of the lands within the boundary of the NANA Corporation, a Native Regional Corporation, from the FDO (Central Yukon Field Office) to the ADO (Anchorage Field Office).

    Person who carried out this activity:

    Bureau of Land Management
    222 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271 -4441 (voice)
    cblack@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 checked on a feature by feature basis.

  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?

    Complete as collected.

  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:
For general mapping use only, for further information contact the respective BLM Field Office.
Any hard copies 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
    Chief Branch of GIS and Mapping
    222 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271 -3274 (voice)
    Lynette_Nakazawa@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: 09-Jul-2008
Last Reviewed: 08-Jul-2008
To be reviewed: 08-Jul-2008
Metadata author:
Bureau of Land Management
222 W. 7th Ave. #13
Anchorage, AK 99513
USA

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:


Generated by mp version 2.9.20 on Thu Apr 28 13:02:27 2016