GIS Metadata

BLM OR Visual Resource Management Publication Polygon

Frequently-asked questions:

What does this data set describe?

BLM OR Visual Resource Management Publication Polygon

VRM_PUB_POLY: Visual Resources are a landscape characteristic and evaluated using a baseline of the natural, unaltered landscape. Visual Resource Inventory (VRI) is the evaluation of an area for its visual potential based on several criteria. Visual Resource Management (VRM) is the classification of lands for the management of visual resources as defined in a Resource Management Plan (RMP). The VRI applies ratings to the landscape for Scenic Quality (visual appeal), Sensitivity Level (measure of public concern for scenic quality), and Distance Zones (three zones based on relative visibility from travel routes or observation points). These three values are combined and areas (polygons) delineated according to the final VRI class. VRM starts with the underlying VRI and overlays it with areas of disturbance as well as areas of protection or restriction. Final management class ratings are based on the degree to which each area is either allowed to depart or has already departed from the natural landscape condition. VRM Proposed (VRM_P) is VRM prior to the signing of the RMP. It is identical to VRM except that it will probably have different final class ratings for the different RMP alternatives. This data is subject to a data standard, Visual Resources Spatial Data Standard. http://www.blm.gov/or/datamanagement/index.php

Supplemental information:
BLM - Bureau of Land Management VRM - Visual Resource Managment VRI - Visual Resource Inventory

  1. How should this data set be cited?

    Bureau of Land Management, 20160929, BLM OR Visual Resource Management Publication Polygon: Portland,OR.

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -124.513434
    East: -116.922270
    North: 49.000115
    South: 41.992470

  3. What does it look like?

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

    Calendar date: 20160929
    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 (10986)

    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 3.9999999999999998e-007. Longitudes are given to the nearest 3.9999999999999998e-007. 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?

    Visual Resource Management Class designations on BLM lands (Source: Bureau of Land Management)

    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    A combination of the BLM administrative state and field office which has administrative responsibility for the spatial entity.   (Source: BLM)

    GIS_ACRES is automatically 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 (Source: BLM)

    Entity and attribute overview:
    Domain values man be found here:
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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?

    Jerry Magee
    Bureau of Land Management
    Natural Resource Specialist
    P.O. Box 2965
    Portland, OR97208

    (503) 808-6086 (voice)
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Why was the data set created?

Resource management planning, characterization and management of scenic/visual quality.

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How was the data set created?

  1. Where did the data come from?

  2. What changes have been made?

    Date: not complete (change 1 of 4)
    Manuscript lines onto paper maps of various scales and digitize. Use DEM to determine distance zones. Use orthophotos as a backdrop to delineate disturbance areas. Use DLG roads and other existing data for buffer (distance) zones. Import designated special management areas and other existing data.

    Person responsible for change:
    Pamela Keller
    Bureau of Land Management
    GIS Specialist
    28910 Highway 20 West
    Hines, OR97738

    (541) 573-4486 (voice)

    Date: 20070131 (change 2 of 4)
    Current version of geodatabase was loaded into ArcSDE.

    Person responsible for change:
    Barbara W. Haney
    OR BLM/Northrop Grumman Corporation
    Sr. GIS Technical Support Specialist
    PO Box 2965
    Portland, OR97208

    503-808-6313 (voice)

    Data sources used in this process:
    • C:\DOCUME~1\bhaney\LOCALS~1\Temp\3\xml15.tmp

    Date: 20110921 (change 3 of 4)
    Corrected attributes to reflect domain changes in for Plan Identifiers: Southeast Oregon RMP 2002 (not 2003), and the Steens CMPA 2005 (removed Andrews RA RMP from the code, however this code is still utilized in Andrews outside of the Steens CMPA as it was part of the same analysis, per Pam Keller, Burns District GIS Coordinator).

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

    (503) 808-6416 (voice)

    Date: 20140825 (change 4 of 4)
    Added fields BLM_ORG_CD and GIS_ACRES

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

    (503) 808-6416 (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?

    Horizontal accuracy determined by coincidence with VRM lines.

  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?

    Geometry: Polygons that form a continuous "wall-to-wall" cover across BLM lands with no gaps or overlaps. Topology: Yes. VRM_POLY lines are coincident with VRM_ARC lines and together make the feature dataset, Visual_Resource_Management. Integration Requirements: VRM is created from merging together many different input themes. Attributes on the VRM_ARC provide the information needed to update lines using the correct sources (either by replacement or snapping) and maintain integration across feature classes.

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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: Jerry Magee, state data steward for VRI_PUB_POLY, approved the use of this dataset on July 11, 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: 20140830

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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