. .

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

Oregon / Washington

GIS Metadata


BLM OR Noxious and Invasive Weeds Polygon

Frequently-asked questions:


What does this data set describe?

Title:
BLM OR Noxious and Invasive Weeds Polygon

Abstract:
weeds_poly: This is a depiction of Noxious and Invasive Weed infestations in Oregon and Washington. Attributes are provided that give basic information about the weed infestation site such as the species of weed, how many plants there are, when the site was discovered, whether this is a current or historical site, etc.

Supplemental information:
BLM (Bureau of Land Management)

  1. How should this data set be cited?

    Bureau of Land Management, 20140121, BLM OR Noxious and Invasive Weeds Polygon: OR BLM, Portland, OR.

    Other citation details:
    Geodatabase is known as WEEDS in internal BLM systems.

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -124.511726
    East: 117.181966
    North: 48.987770
    South: -0.000057

  3. What does it look like?

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

    Calendar date: 20140121
    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 (133024)

    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 2e-008. Longitudes are given to the nearest 2e-008. 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?

    OSODBA.WEEDS_POLY_new
    ACC_FT
    How close, in feet, the spatial GIS depiction is to the actual location on the ground.  There are several factors to consider in GIS error: scale and accuracy of map-based sources, accuracy of GPS equipment, and the skill level of the data manipulators.  A value of "0" indicates no entry was made.  This is the correct value when the COORD_SRC is another GIS theme (DLG, GCD, DEM) because the accuracy is determined by that theme.  If COORD_SRC is MAP or GPS, however, a value of "0" indicates a missing value that should be filled in either with a non-zero number or "-1".  A value of "-1" indicates that the accuracy is unknown and no reliable estimate can be made. (Source: Bureau of Land Management)
                      

    COORD_SRC
    The actual source of the GIS coordinates for the line segments. (Source: Bureau of Land Management)
                      

    ValueDefinition
    CFF
    Lines duplicated or buffered from Cartographic Feature Files (USFS).
    DEM
    Digital Elevation Model (30m or better accuracy) used for creation of contours.
    DLG
    Lines duplicated or buffered from USGS Digital Line Graph derived GIS themes.
    DOQ
    Digitized linework over Digital Orthoquad backdrop.
    DRG
    Digitized linework over Digital Raster Graphic backdrop.
    GPS
    Lines obtained from a Global Positioning System device.
    MAP
    Digitized linework from hardcopy map.
    TRS
    Coordinates only given as a legal description (township, range, section).
    UNK
    Unknown coordinate source (Default value).

    DISC_DATE
    The date which the site was originally discovered (YYYYMMDD). (Source: Bureau of Land Management)
                      

    DIST_CD
    A unique 2 character identifier for a BLM District within a BLM Administrative Area (Source: Bureau of Land Management)
                      

    ValueDefinition
    01
    Lakeview
    02
    Burns
    03
    Vale
    05
    Prineville
    08
    Salem
    09
    Eugene
    10
    Roseburg
    11
    Medford
    12
    Coos Bay
    13
    Spokane

    GIS_ID
    GIS assigned numeric (integers only) identifier for every polygon feature. GIS_ID is never duplicated in the database. Used in conjunction with SITE_ID to track changes in the extent of a weed population over time. If a site has increased or decreased in size, the old population extent may be kept for historical reference. The new population extent would be assigned the same SITE_ID value, but a unique GIS_ID value. The OC_CD value of new population extent would be coded "C" and the old population is changed from "C" to "H". (Source: Bureau of Land Management)
                      

    NUM_PLTS
    The number of individual plants that infest a particular weed site. Can also represent the number per unit of measure (e.g., 100 plants per acre) when used in combination with UNIT_MEAS. (Source: Bureau of Land Management)
                      

    OBJECTID
    Internal feature number. (Source: ESRI)
                      

    Sequential unique whole numbers that are automatically generated.

    OC_CD
    Defines whether an area is currently occupied by a weed, no longer occupied by a weed, or if a change in the extent of a weed population has occurred. If a site has increased or decreased in size, the old population extent may be kept for historical reference and the OC_CD value for the old population is changed from "C" to "H". The new population extent would be coded "C" and be assigned the same SITE_ID value, but a unique GIS_ID value. (Source: Bureau of Land Management)
                      

    ValueDefinition
    H
    OC_CD value for the old population
    C
    The new population extent

    REV_DATE
    The most recent date that the site was revisited (YYYYMMDD) (Source: Bureau of Land Management)
                      

    SHAPE
    Feature geometry. (Source: ESRI)
                      

    Coordinates defining the features.

    SITE_ID
    Unique number assigned to each new noxious weed site (infestation). (Source: Bureau of Land Management)
                      

    SPECCODE
    An acronym constructed following the Garrison-Skovlin_Poulton system to represent a plant genus/species. Also called a Plant Symbol. Codes are assigned by the USDA National Resource Conservation Service (NRCS) national botanist. (Source: USDA, NRCS 1999. The PLANTS database (http://plants.usda.gov/plants). National Plant Data Center, Baton Rouge, LA 70874-4490 USA)
                      

    CLASSIFIER
    Bureau of Land Management employee, cooperating organization or company that identifies or classifies the plant. (Source: BLM)
                      

    UNIT_MEAS
    Standardized abbreviations for length, weight, and area in English and metric units of measure. This attribute will only be used in conjunction with the attribute NUM_PLTS. (Source: Bureau of Land Management)
                      

    ValueDefinition
    AC
    Acre
    SQM
    Square meters
    SQMI
    [not provided]
    HA
    Square miles
    Hectares
    TOTAL
    Total count, no units applied

    UNIQUE_ID
    COMMENTS
    Any additional information. (Source: Bureau of Land Management)
                      

    NISIMS_ID
    COVER_PCT
    Percent of total ground cover occupied by weed plants. (Source: Bureau of Land Management)
                      

    PHENOLOGY
    Growth stage of target plants. (Source: Bureau of Land Management)
                      

    ValueDefinition
    Seedling
    Seedling
    Rosette
    Rosette
    Bolting
    Bolting
    Bud
    Bud
    Flowering
    Flowering
    Seedset
    Seedset
    Deaddormant
    Deaddormant
    Seedling/Seedset
    Seedling/Seedset
    Bud/Flowering
    Bud/Flowering
    Rosette/Bolting
    Rosette/Bolting
    Rosette/Flowering
    Rosette/Flowering
    Seedling/Rosette
    Seedling/Rosette
    Flowering/Seedset
    Flowering/Seedset

    SHAPE.AREA
    SHAPE.LEN
    Entity and attribute overview:
    Attributes are provided that give basic information about the weed infestation site such as the species of weed, how many plants there are, when the site was discovered, whether this is a current or historical site, etc.
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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?

    Jeanne Standley
    Bureau of Land Management, Oregon State Office
    Botanist
    1300 Airport Lane
    North Bend, OR 97459
    US

    (541) 751-4283 (voice)
    (541)751-4303 (FAX)
    jstandle@blm.gov
    Hours of Service: 8am-5pm
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Why was the data set created?

Tracking of noxious weed infestations to aid in prevention and control of establishment and spread.

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How was the data set created?

  1. Where did the data come from?

    24K DRG (source 1 of 2)

    Bureau of Land Management Oregon State Office, 20000601, 24K Digital Raster Graphics Oregon: OR BLM, Portland, OR.

    Type of source media: onLine
    Source scale denominator: 24000
    Source contribution:
    Back drop for digitizing

    DOQ (source 2 of 2)

    Bureau of Land Management, unknown, BLM Digital Orthophoto Quadrangles.

    Type of source media: onLine
    Source scale denominator: 24000
    Source contribution:
    Back drop for digitizing

  2. What changes have been made?

    Date: unknown (change 1 of 5)
    Current version of coverage was redesigned as a geodatabase and loaded into ArcSDE. The following entity changes were performed during this redesign: New field "VERSION_NAME" added. The old "ACC" attribute information was split out into two new fields, "COORD_SRC" and "ACC_FT".

    Person responsible for change:
    Steve Salas
    Bureau of Land Management, Oregon State Office
    GIS Specialist
    P.O. Box 2965
    Portland, OR 97208
    US

    (503) 808-6416 (voice)
    ssalas@blm.gov

    Date: 20110217 (change 2 of 5)
    Updated Weeds with 2010 new sites and changes to old sites. About 860 sites.

    Person responsible for change:
    Pam Keller
    Bureau of Land Management, Burns District
    GIS Coordinator
    28910 Hwy 20 West
    Hines, OR 97738
    US

    (541) 573-4486 (voice)
    pkeller@blm.gov

    Date: 20111014 (change 3 of 5)
    Added the 627 weed polygons (buffered from points) created by Molly Boyter in 2009.

    Person responsible for change:
    Pam Keller
    Bureau of Land Management, Burns District
    GIS Coordinator
    28910 Hwy 20 West
    Hines, OR 97738
    US

    (541) 573-4486 (voice)
    pkeller@blm.gov

    Date: 20120101 (change 4 of 5)
    2011 weed location inventory sites for Burns, Coos Bay and Eugene added. Earlier sites for Coos Bay also added. Unique GIS_IDs created. Except for Burns, SITE_ID was simply set to GIS_ID. For the other Districts, this may not be what is desired since it doesn't indicate whether a site is related to an existing site (in which case it would have the same SITE_ID) but has changed it's extent. There is a great deal of overlap in Eugene sites that will need to be resolved at some time to avoid a greatly inflated acreage. Multi-part polygons (thousands) were exploded and unique IDs added to all. There were thousands of "self-intersect" errors from creating sites by buffering roads and not thinning the vertices. A global thin (generalize) to 1 meter was done and eliminated the errors without significant change to the shape of the polygons. There were some SITE_ID/GIS_IDs that were too high (in the billions) to allow for concatenation of DIST_CD to make a statewide unique ID. These were dropped to lower numbers by subtracting a fixed number. Contact Pam Keller for specifics if needed. For the entire dataset REV_DATE and DISC_DATE were cleaned up to eliminate invalid values. Also if REV_DATE was blank and DISC_DATE not blank, REV_DATE was set to DISC_DATE. And vice versa. All remaining blanks and nulls set to "UNKNOWN".

    Person responsible for change:
    Pamela Keller
    Bureau of Land Management, Burns District Office
    GIS Coordinator
    28910 Hwy 20 West
    Hines, OR 97738-9424
    US

    (541) 573-4486 (voice)
    pkeller@blm.gov

    Date: 20130402 (change 5 of 5)
    NISMS_ID field changed from LongInt to GUID. Publish Classifier field.

    Person responsible for change:
    Steve Salas
    Bureau of Land Management
    GIS Spec.
    P.O. Box 2965
    Portland, OR 97208
    US

    (503) 808-6416 (voice)
    r2mills@blm.gov

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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?

    Positional accuracy of the individual polygons is described in the attributes "COORD_SRC" and "ACC_FT".

  3. How accurate are the heights or depths?

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

    Data is currently available for the all districts except Coos Bay.

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

    Weeds consist of unique polygons that may overlap.

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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 for 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 information may be updated without notification

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, OR 97208
    US

    503-808-6340 (voice)
    503-808-6419 (FAX)
    ehiebent@blm.gov
    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?

  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?

Dates:
Last modified: 20000608
Last reviewed: 20130402

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

(503) 808-6340 (voice)
(503) 808-6419 (FAX)
r2mills@blm.gov
Hours of Service: 8:00-4:00
Contact Instructions:
None

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

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