. .



Oregon / Washington

GIS Metadata

BLM OR GTRN Back Country Byways Line

Frequently-asked questions:

What does this data set describe?

BLM OR GTRN Back Country Byways Line

Back_Country_Byways_arc: The BCB theme is graphical display of the centerline of Back Country Byways in Oregon. This layer is displayed as a single line. The source linework was extracted from the BLM's Ground Transportation Roads layer (GTRN).

Supplemental information:
Back Country Byways (BCB) Ground Transportation (GTRN) A published revision of the Department Manual's Part 305: Departmental Science Effects, Chapter 3: Integrity of Scientific and Scholarly Activities (305 DM 3), effective December 16, 2014, is available online at http://elips.doi.gov/ELIPS/DocView.aspx?id=4056. Scholarly information considered in Departmental decision making must be robust, of the highest quality, and the result of as rigorous scientific and scholarly processes as can be achieved. Most importantly, it must be trustworthy. This policy helps us to achieve that standard (http://www.doi.gov/scientificintegrity/index.cfm).

  1. How should this data set be cited?

    OR/WA BLM, 20161021, BLM OR GTRN Back Country Byways Line: OR BLM, Portland, OR.

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -123.890116
    East: -116.951276
    North: 45.391391
    South: 42.212566

  3. What does it look like?

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

    Calendar date: 20161021
    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?

      Indirect spatial reference:

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • String (1833)

    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?

    Back Country Byways for Oregon (Source: OR/WA BLM)

    The length of the Back Country Byway in miles. (Source: BLM)

    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    The controlling resource area of the Back Country Byway. (Source: BLM)

    The name  the Back Country Byway is commonly known by. (Source: BLM)

    It's common name

    Length of feature in internal units. (Source: Esri)

    Positive real numbers that are automatically generated.

Back to Top

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • OR/WA BLM

  2. Who also contributed to the data set?

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

    Bonnie Lippitt
    Bureau of Land Management Oregon State Office
    Interpretive Specialist
    P.O Box 2965
    Portland, OR 97208

    503-808-2437 (voice)
    (503) 808-2429 (FAX)
    Contact Instructions:
    Call or Email
Back to Top

Why was the data set created?

This data is intended primarily for cartographic display.

Back to Top

How was the data set created?

  1. Where did the data come from?

    GTRN (source 1 of 1)

    OR/WA BLM, unknown, Ground Transportation Roads and Trails (GTRN): OR BLM, Portland, OR.

    Type of source media: onLine
    Source scale denominator: 2400
    Source contribution:

  2. What changes have been made?

    Date: 20110527 (change 1 of 1)
    Lines were extracted from Ground Transportation Publication Roads where the special designation name matches a Backcountry Byway name. No attributes from the roads layer were retained - only those from the BackCountryByway table are used.

    Person responsible for change:
    Steve Salas
    U.S. Bureau of Land Management - OR/WA State Office
    GIS Specialist
    503-808-6416 (voice)

    Data sources used in this process:
    • GTRN

Back to Top

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    There is no accuracy report for this data.

  2. How accurate are the geographic locations?

    There is no accuracy report for this data.

  3. How accurate are the heights or depths?

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

    Data is complete for Oregon.

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

    Data has not been tested for Logical Consistency

Back to Top

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 might 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 sources from which they were derived, and both scale and accuracy may vary across the data set. These data might 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.

Distributor 1 of 1

  1. Who distributes the data set?

    Eric Hiebenthal
    Bureau of Land Management, Oregon State Office
    GIS Data Management Specialist
    P.O. Box 2965
    Portland, OR 97208

    503-808-6565 (voice)
    503-808-6419 (FAX)

  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?

    • Availability in digital form:

    • Data format:
      in format Arc GIS (version Feature Class) Winzip

  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?

Back to Top

Who wrote the metadata?

Last modified: 20090810
Last reviewed: 20110624

Metadata author:
Roger Mills
Bureau of Land Management, Oregon State Office
GIS Specialist
P.O. Box 2965
Portland, OR 97208

(503)808-6340 (voice)
(503)808-6004 (front desk) (voice)

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

Back to Top