PLSS

Metadata also available as

Frequently-anticipated questions:


What does this data set describe?

Title: PLSS
Abstract:
This layer contains Forest wide PLSS (Public Land Survey System) information which has Township, Section and Land Status lines. This layer has Line(.AAT) and Polygon(.PAT) features. The original data was provided through the Cartographic Features Files(CFF) supplied by the Geometronics Service Center(GSC) in Salt Lake City, UT. These features were digitized off of the Primary Base Quadrangles meeting map standard accuracies. The data was in a Line format with each having the applicable codes(was multi-coded) and the Polygons were created at a later date.
The Landline and Status line information was a result of information acquired by GSC using original, resurveys by the General Land Office(GLO), and more recently the Bureau of Land Management(BLM). The Township and Section lines were then drawn and were given three designations on the maps: Surveyed, Location Reliable: Lines that have been recently surveyed that would be meeting map accuracies, (basically recent surveys by the GLO or BLM).
Surveyed, Location Approximate:lines that in most cases, relate to the original survey and do not have enough information to be fully reliable.
Unsurveyed, Protraction: lines that were shown on the original survey plats that related to patenting of lands but were never surveyed.
One other method of that was used in the past for updating the line information was Corner Point Photo Identification. This method was used on a limited basis and if used in the future, will be done only under extreme circumstances.
Supplemental_Information:
The initial updating for the Polygon and Line layers was done within the first couple of years after the data was acquired. This involved edgematching of all the Quads which was necessary as they were being appended. Once this was complete, the Polygons were labeled with a Township, Range, and Section.At the same time, the Lines were attributed with various codes with two of these relating to the original coding from GSC. Others were then identified that dealt with when a update was completed and codes necessary for Survey needs. At that time there was no updating performed that would relate to "as surveyed on the ground" lines. Future updating will be performed using recent surveys with Geodetic ties to known Triangulation or Global Positioning System(GPS) stations. This work will either be performed here on the Forest or by the BLM through their Geodetic Coordinate Data Base (GCDB) program. Line segments were digitized initially from Primary Base Quads at map accuracy standards. We are now and have been in the process of using this "as surveyed" data with ties to known Triangulation or GPS stations. The corner coordinates (that relate to these surveys) will eventually all be within 10 feet of the true coordinate position. This is a "Double Precision" layer.
  1. How should this data set be cited?

    Forest, Siuslaw National , Unknown, PLSS.

    Online Links:

    Other_Citation_Details: Pathname: /fsfiles/ref/library/gis/siu/plss

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -124.475501
    East_Bounding_Coordinate: -123.305715
    North_Bounding_Coordinate: 45.392510
    South_Bounding_Coordinate: 43.367268

  3. What does it look like?

    File:///j:/fsfiles/ref/library/gis/siu/plss/map.gif (GIF)

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

    Calendar_Date: unknown
    Time_of_Day: 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 (1921)
      • Label point (900)
      • GT-polygon composed of chains (900)
      • Point (350)
      • 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.

  7. How does the data set describe geographic features?

    ownership.pat

    FID
    Internal feature number. (Source: ESRI)

    Frequency of measurement: As needed

    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.

    OWNERSHIP#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

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

    Whole numbers that are automatically generated.

    OWN
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    PLSS#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

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

    GSCCODE
    GSC designated accuracy code for the Township or Section lines.

    ValueDefinition
    502Township or Range Line (Location Reliable)
    503Township or Range Line (Location Approximate)
    504Section Line (Location Reliable)
    505Section Line (Location Approximate)
    508Township or Range Line (Location Protracted)
    509Section Line (Location Protracted)
    999A code added by the Survey GIS Coordinator for lines that close out polygons against the coast, river, roads, Quads, etc.

    POSTED
    Identifier signifying whether a property line is posted or not

    ValueDefinition
    YYes, the property line has been posted to Forest Service Standards
    NNo, the property line(or other lines) have not been posted

    YRPOSTED
    Year Identifier for each line that has been posted or maintained

    Range of values
    Minimum:1960
    Maximum:Present

    YRUPDATE
    Year Land or Status lines were last updated

    Range of values
    Minimum:1990
    Maximum:Present

    WHO
    Person who performed latest updates on a line

    Individuals last name

    METHOD
    Type of updating information used

    ValueDefinition
    SurveyInformation from recent survey with ties to Geodetic Control Station
    GCDBInformation obtained from BLM through Geodetic Coordinate Data Base
    GPSInformation using Global Positioning Systems

    PLINECODE
    GSC(CFF) identifier for property lines against Private or BLM

    ValueDefinition
    651Property lines against Private Lands (ownership other than BLM)
    653Property lines against the BLM

    plss.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.

    PLSS#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

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

    TOWNSHIP
    Code for each polygon residing in aTownship. This is a 1 or 2 digit code that is tied to the Public Land Surveying unit that relates to the North-South tier structure. It is used in conjunction with the term "Range" with reference to the initial point of the Meridian, and as a standard, defines a square area of 6 miles which is subdivided into 36 sections.

    ValueDefinition
    2,3,4,5,6,7,8,9,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25 

    RANGE
    Numeric Code for each Range. This is a 1 or 2 digit code that is tied to the Public Land Surveying unit that relates to the East-West meridian structure. It is used in conjunction with the term "Township " with reference to the initial point of the particular Meridian, and as a standard, defines a square area of 6 miles which is subdivided into 36 sections.

    ValueDefinition
    6,7,8,9,10,11,12,13 

    SECTION
    Section number

    SECNUM
    Section numbers for cartographic purposes.

    OWN
    Identifier for each Landowner

    ValueDefinition
    SNFSiuslaw National Forest
    BLMBureau of Land Management
    STAState
    COUCounty
    GRIGrand Ronde Indian reservation land
    BAYAreas that are water bodies
    LAKAreas that are lakes

    EXCHANGE
    LANDS identified to be disposed of or acquired

    ValueDefinition
    DLands available for Disposal
    ALands available for Aquisition

    EXNAME
    Identifying name for exchange parcel

    Name of exchange parcel


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?

    USDA Forest Service, Siuslaw National Forest
    GIS Coordinator
    PO Box 1148
    Corvallis, OR 97339
    USA

    541-750-7000 (voice)
    541-750-7234 (FAX)

    Hours_of_Service: 8:00 am - 5:00 pm


Why was the data set created?

REQUIRED: A summary of the intentions with which the data set was developed.


How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 12000

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

    (process 1 of 2)

    Person who carried out this activity:

    GIS Coordinator
    USDA Forest Service, Siuslaw National Forest
    PO Box 1148
    Corvallis, OR 97339
    USA

    541-750-7000 (voice)
    541-750-7234 (FAX)

    Hours_of_Service: 8:00 am - 8:00 pm
    (process 2 of 2)
    Dataset copied.

    Data sources used in this process:

    • i:\fsfiles\ref\library\gis\siu\ls

  3. What similar or related data should the user be aware of?

    , Unknown.


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

  1. How well have the observations been checked?

    Line segments were digitized initially from Primary Base Quads at map accuracy standards. We are now and have been in the process of using this "as surveyed" data with ties to known Triangulation or GPS stations. The corner coordinates (that relate to these surveys) will eventually all be within 10 feet of the true coordinate position. This is a "Double Precision" layer.

  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: None

  1. Who distributes the data set? (Distributor 1 of 1)

    USDA Forest Service, Siuslaw National Forest
    GIS Coordinator
    PO Box 1148
    Corvallis, OR 97339
    USA

    541-750-7000 (voice)
    541-750-7234 (FAX)

    Hours_of_Service: 8:00 am - 5:00 pm
  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: 04-Nov-2009
Last Reviewed: March 2002
To be reviewed: Unknown
Metadata author:
USDA Forest Service, Siuslaw National Forest
GIS Coordinator
PO Box 1148
Corvallis, OR 97339
USA

541-750-7000 (voice)
541-750-7234 (FAX)

Hours_of_Service: 8:00 am - 5:00 pm
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.6 on Wed Nov 04 23:00:54 2009