GIS Metadata

BLM OR Land Tenure Zones Polygon

Frequently-asked questions:

What does this data set describe?

BLM OR Land Tenure Zones Polygon

LTZ_POLY: This feature class represents BLM Land Tenure Zones (LTZ) for Oregon and Washington, areas (zones) on BLM lands as Retention/Acquisition, Exchange, or Disposal of lands under BLM jurisdiction. The LTZ polygons do not identify actual acquisition or disposal actions, but rather the zones of potential land tenure adjustment as determined through the land use planning process. All BLM lands are covered by these zones. For detailed information on individual parcels contact the relevant BLM Oregon district staff. This data conforms to the 'Land Tenure Zones Spatial Data Standard 20131130. 'http://www.blm.gov/or/datamanagement/index.php'

  1. How should this data set be cited?

    Bureau of Land Management, 20170104, BLM OR Land Tenure Zones Polygon.

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -124.513434
    East: -116.772753
    North: 46.108048
    South: 41.978511

  3. What does it look like?

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

    Calendar date: 20170104
    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):
      • GT-polygon composed of chains (10609)

    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 8.98315284119521e-009. Longitudes are given to the nearest 8.98315284119521e-009. Latitude and longitude values are specified in Decimal Degrees.

      The horizontal datum used is D North American 1983.
      The ellipsoid used is GRS 1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.

  7. How does the data set describe geographic features?

    This feature class represents BLM Land Tenure Zones (LTZ) for Oregon and Washington (Source: BLM)

    Internal feature number. (Source: Esri)

    Sequential unique whole numbers that are automatically generated.

    Feature geometry. (Source: Esri)

    Coordinates defining the features.

    The official name of the LUP, whether final, in progress, or historic.  The LUP names are a subset of the larger PLANID domain.   (Source: BLM)

    A combination of the BLM administrative state and field office which has administrative responsibility for the spatial entity.  This includes which office covers the entity for planning purposes and which office is the lead for GIS edits.  Another agency or individual may have the physical management responsibility for the on-the-ground entity.  This field applies particularly when a spatial entity crosses resource area or district boundaries and the administrative responsibility is assigned to one or the other rather than splitting the spatial unit.  Similarly, OR/WA BLM may have administrative responsibility over some area that is physically located in Nevada, Idaho, and California and vice versa.  When appropriate, the office can be identified only to the district or state level rather than to the resource area level. The domain listing for this attribute is too lengthy to list here. Consult the data standard for this data or contact the OR BLM data steward for the domain listing. A domain listing may also be found at this website.http://www.blm.gov/or/datamanagement/index.php (Source: BLM)

    The designated land tenure zone.  The three primary zones are: 1-Retention or Acquisition; 2-Exchange; 3-Disposal.  (Source: BLM)

    1-Retention or Acquisition Zone
    1a - District determined subdivision or subset of Zone 1, if needed.
    1b - District determined subdivision or subset of Zone 1, if needed.
    1c - District determined subdivision or subset of Zone1, if needed.
    2-Exchange or Consolidation Zone
    2a- District determined subdivision or subset of Zone 2, if needed.
    2b- District determined subdivision or subset of Zone 2, if needed.
    2c- District determined subdivision or subset of Zone 2, if needed.
    3-Disposal Zone
    3a-District determined subdivision or subset of Zone 3, if needed.
    3b-District determined subdivision or subset of Zone 3, if needed.
    3b-District determined subdivision or subset of Zone 3, if needed.
    UN - Unknown or Not Applicable

    The dominant (strongest, least likely to change) reason for the particular designation. The attribute identifies the entity that was used to create the polygon and, therefore, acts as polygon feature-level metadata. (Source: BLM)

    WILD Wilderness
    WSR - Wild and Scenic River
    WSA Wilderness Study Area
    SCENICCORR Designated Scenic Highway Corridor
    OPENPLAY-Specially designated OHV open area
    OPENMMS - Area declared open for mineral materials
    ACEC - Areas of Critical Environmental Concern
    CULT - Cultural (archeological) site
    ROW - Utility Corridor or site
    CMPA - Cooperative Management and Protection Area
    RECSITE - Recreation Site
    ADMNSITE - Administrative Site
    FEDLIST - Federally listed species habitat
    WITHDWL - Mineral withdrawal
    LEK-Sage Grouse lek buffer area
    SOIL - Fragile soils
    HAZMAT - Hazardous materials area
    HIST - Historic district or designated site
    HMA - Wildhorse or Burro Herd Management Area
    SRMA - Special Recreation Management Area
    BIGGAME - Big game winter range
    RAPTOR - Raptor areas
    RIPARIAN Wetland or Riparian
    ROADW - Wilderness or WSA cherry-stem road buffer
    WJMAO - Wildlands Juniper Management Area Outside 1/2 Mile Steens Loop Road Buffer
    WJMA - Wildlands Juniper Management Area Inside 1/2 Mile Steens Loop Road Buffer
    VRM - Visual Resource Management class determines the designation
    VRI - Original Visual Resource Inventory class determines the designation
    BLMOPEN - Meets Bureau policy for open use
    UNK - Unknown reason
    Designation used for BLM land not receiving a designation for particular resource or special management reason.
    Sage-grouse habitat
    Wildlife Habitat - If a more specific choice is not appropriate.

    GIS_ACRES is calculated when the submitted polygon is approved for incorporation into the dataset.  The standard spatial reference of Geographic (NAD 1983) cannot be used for calculating acres so the features are projected to one of three projections as determined by the BLM_ORG_CD of the record.  These three projections all utilize linear units of meters, so the ESRI Geodatabase-controlled field SHAPE.AREA can be used to convert to acres with the factor based on the U.S. Survey Foot: GIS_ACRES = SHAPE.AREA * 0.0002471044; District indicated by BLM_ORG_CD:	ESRI Projection used: Prineville	NAD 1983 USFS R6 Albers; Coos Bay, Eugene, Lakeview, Medford, Roseburg, Salem	NAD 1983 UTM Zone 10N; Burns, Spokane, Vale	NAD 1983 UTM Zone 11N (Source: BLM)

    Entity and attribute overview:
    Attributes are provided that give basic information about source, type, and accuracy of the line data. More information may be found in the data standard if available: https://www.blm.gov/or/gis/data.php
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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)

    • Bureau of Land Management

  2. Who also contributed to the data set?

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

    Janet Cheek
    Bureau of Land Management
    Land Law Examiner
    P.O. Box 2965
    Portland, OR97208

    (503) 808-6040 (voice)
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Why was the data set created?

This dataset is used for depicting the different BLM Land Tenure Zones on maps and for overlaying in GIS with other data themes to determine feasibility and impact of project proposals.

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How was the data set created?

  1. Where did the data come from?

  2. What changes have been made?

    Date: 20131120 (change 1 of 1)
    Source data was provided by OR/WA BLM district staff and assembled by OR BLM State Office GIS staff. Source data is variable in type and quality. Contact district staff for detailed information on specific parcels. LTZ data will be maintained by BLM state level and district staff in a transactional database.

    Person responsible for change:
    Erin Frostad
    Bureau of Land Management
    GIS Specialist
    P.O. Box 2965
    Portland, OR97208

    (503) 808-6524 (voice)

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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?

    Description: Instance of Special Management Areas (SMA) Existing group. Geometry: Polygons form a continuous "wall-to-wall" cover across BLM lands. Polygons may not overlap. Topology: Yes. LTZ_POLY lines are coincident with LTZ_ARC lines and together make the feature dataset, LTZ. Integration Requirements: None.

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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: PUBLIC DATA: None, these data are considered public domain.
Use constraints:
These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived, and both scale and accuracy may vary across the data set. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This data may be updated by the BLM without notification. DATA STEWARD APPROVAL: Jenny Liang, state data steward for LTZ_PUB_POLY, approved the use of this dataset on July 25, 2016.

Distributor 1 of 1

  1. Who distributes the data set?

    Eric Hiebenthal
    Bureau of Land Management
    GIS Data Management Specialist
    P.O Box 2965
    Portland, OR97208

    503-808-6340 (voice)
    503-808-6419 (FAX)
    Contact Instructions:
    contact instructions

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

  3. What legal disclaimers am I supposed to read?

    The BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.

  4. How can I download or order the data?

    • Cost to order the data: Contact distributor.

    • Special instructions:

      Data are only available through the Oregon/Washington State office of the Bureau of Land Management.

  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?

Last modified: 20131115

Metadata author:
Roger Mills
Bureau of Land Management, Oregon State Office
GIS Specialist
P.O. Box 2965
Portland, OR97208

(503) 808-6340 (voice)
(503) 808-6419 (FAX)
Hours of Service: 8:00-4:00
Contact Instructions:

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

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