pnv

Metadata also available as

Frequently-anticipated questions:


What does this data set describe?

Title: pnv
Abstract:
Potential natural vegetation (PNV) refers to the plant community that would be established if all successional sequences were completed without human interference under the present environmental conditions, including those created by humans. PNV is a useful tool to stratify the landscape into basic units of land capability. PNV maps should, by design, be rather stable. They may, however, be refined or updated as better information becomes available. In comparison, the concept of existing vegetation is based on the composition and arrangement of plants that exist today. Existing vegetation is best mapped as a separate initiative and layer with separate protocols. Existing vegetation types may be used to describe the seral stages associated with PNV types when the relationship can be clearly demonstrated. The potential natural vegetation coverage is based on mapping or modeling at the Forest or Ranger District level. It may be derived from Terrestrial Ecological Unit maps if appropriate. Data standards for hierarchical map and classification level codes for PNV are maintained by the NRIS Terra data stewards. Refer to NRIS Terra Data Dictionary on the NRIS Terra website.
Supplemental_Information:
Johnson, C. G., Rodrick R. Clausnitzer. 1992 Plant Associations of the Blue Mountains, USDA Forest Service, PNW, R6-ERW-TP-036-92.
  1. How should this data set be cited?

    Forest, Ochoco National , Unknown, pnv.

    Online Links:

    • SV06PD3B\dfsroot\fsfiles\ref\library\gis\och\

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -121.571253
    East_Bounding_Coordinate: -119.532366
    North_Bounding_Coordinate: 44.747525
    South_Bounding_Coordinate: 43.968695

  3. What does it look like?

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

    Calendar_Date: unknown
    Currentness_Reference: ground condition

  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):

      • Complete chain (33966)
      • Label point (13275)
      • GT-polygon composed of chains (13275)
      • Point (0)
      • Label point (0)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Albers Conical Equal Area.

      Projection parameters:
      Standard_Parallel: 43.000000
      Standard_Parallel: 48.000000
      Longitude_of_Central_Meridian: -120.000000
      Latitude_of_Projection_Origin: 34.000000
      False_Easting: 600000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000000
      Ordinates (y-coordinates) are specified to the nearest 0.000000
      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.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 0.000010
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    pnv.pat

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    AREA
    Area of feature in internal units squared. (Source: ESRI)

    Positive real numbers that are automatically generated.

    PERIMETER
    Perimeter of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    PNV#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    PNV-ID
    User-defined feature number. (Source: ESRI)

    PNV_CN

    MAP_UNIT_SYMBOL

    PROJECT

    PNV_LABEL


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?

    Ochoco National Forest

    (541) 416-6500 (voice)


Why was the data set created?

Existing Vegetation (EV) is the plant community, or floristic composition and vegetation structure, occurring at a given location at the current time.


How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 2)
    Dataset copied.

    Data sources used in this process:

    • c:\lib\gis\och\pnv

    (process 2 of 2)
    Dataset copied.

    Data sources used in this process:

    • f:\re_proj\lib\och\pnv

  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?

  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?


How can someone get a copy of the data set?

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

Access_Constraints: None
Use_Constraints:
Neither the United States Government nor any of it's employees make any warranty, express or implied, including the warranties of merchantability and fitness for a particular purpose, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

  1. Who distributes the data set?[Distributor contact information not provided.]

  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?


Who wrote the metadata?

Dates:
Last modified: 16-May-2008
Metadata author:
REQUIRED: The organization responsible for the metadata information.
c/o REQUIRED: The person 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:


Generated by mp version 2.9.6 on Mon Sep 14 16:23:09 2009