BLM Cadastral Survey
BLM OR Cadastral PLSS Reference Grid Polygon
vector digital data
PLSSReferenceGrid: This dataset represents the GIS Version of the Public Land Survey System including both rectangular and non-rectangular surveys. The primary source for the data is cadastral survey records housed by the BLM supplemented with local records and geographic control coordinates from states, counties as well as other federal agencies such as the USGS and USFS. The data has been converted from source documents to digital form and transferred into a GIS format that is compliant with FGDC Cadastral Data Content Standards and Guidelines for publication. This data is optimized for data publication and sharing rather than for specific "production" or operation and maintenance. This data set includes the following: PLSS Fully Intersected (all of the PLSS feature at the atomic or smallest polygon level), PLSS Townships, First Divisions and Second Divisions (the hierarchical break down of the PLSS Rectangular surveys) PLSS Special surveys (non rectangular components of the PLSS) Meandered Water, Corners and Conflicted Areas (known areas of gaps or overlaps between Townships or state boundaries). The Entity-Attribute section of this metadata describes these components in greater detail.
The CADNSDI or the Cadastral Publication Data Standard is the cadastral data component of the NSDI. This is the publication guideline for cadastral data that is intended to provide a common format and structure and content for cadastral information that can be made available across jurisdictional boundaries, providing a consistent and uniform cadastral data to meet business need that includes connections to the source information from the data stewards. The data stewards determine which data are published and should be contacted for any questions on data content or for additional information. The cadastral publication data is data provided by cadastral data producers in a standard form on a regular basis. Cadastral publication data has two primary components, land parcel data and cadastral reference data. It is important to recognize that the publication data are not the same as the operation and maintenance or production data. The production data is structured to optimize maintenance processes, is integrated with internal agency operations and contains much more detail than the publication data. The publication data is a subset of the more complete production data and is reformatted to meet a national standard so data can be integrated across jurisdictional boundaries and be presented in a consistent and standard form nationally.
FGDC Data Content Standard
PLSS Special Surveys
Geographic Coordinate Database
Public Land Survey System
ISO 19115 Topic Categories
Geographic Names Information System (GNIS)
PUBLIC DATA: None, these data are considered public domain.
These data are provided by Bureau of Land Management (BLM) “as is” and may contain errors or omissions. Users assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for 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. Users are 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. Users wishing to modify the data should describe the types of modifications they have performed. Users 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. It is strongly recommended that these data be acquired directly from the U.S. Bureau of Land Management and not indirectly through some other source which may have changed the data. It is strongly recommended that careful attention be paid to the content of the metadata file associated with these data. Users are cautioned that digital enlargement of these data to scales larger than that at which they where originally mapped can cause misinterpretation. Users are further cautioned that these data and interpretations derived from them do not eliminate the need for onsite survey and evaluation of specific sites for intensive uses. The U.S. Bureau of Land Management should be cited as the data source in any products derived from these data.
BLM,Oregon State Office
P.O Box 2965
Microsoft Windows Vista Version 6.1 (Build 7600) ; ESRI ArcCatalog 22.214.171.12400
Data conforming to the Publication Guideline should follow for the format and structure of the standard for published data. This means that the topological relationships of the PLSS and parcels should be followed. Level 1 conformance to the guideline means that the data follows and conforms to the structure and an active data steward is identified and engaged in data creation and maintenance. Level 2 conformance all attributes that are necessary for essential query, extraction, labeling and use are present. Level 3 conformance all attributes as applicable are populated. The Oregon Data Set is at Level 3 of 3 Conformance and fully complies with the national standard
The Subcommittee recognizes that not all data is available in all places, but the data that is available should be provided for publication in the format provided in this guideleines. Exceptions to complete data should be noted by the data steward. The Oregon Data Set contains all of the available GCDB PLSS data.
Executive Order 12906 calls for the establishment of the National Spatial Data Infrastructure defined as the technologies, policies, and people necessary to promote sharing of geospatial data throughout all levels of government, the private and non-profit sectors, and the academic community.
In 2003 the Cadastral Subcommittee met in Portland Oregon, hosted by the Forest Service, and defined the polices and needs for establishing a robust Cadastral Publication Data Standard for the NSDI.
In 2007 after a series of workshops and meetings with key business functions a set of core data was documented. This document was published on the Subcommittee's outreach web site (http://www.nationalcad.org) and it described the data and organizational relationships for the maintenance of the data that is the Cadastral NSDI. This document served as a standard for the Cadastral NSDI content.
FGDC Cadastral Subcommittee developed the Cadastral Data Content Standard and submitted it for approval to the FGDC. This was completed in 1998. The most recent version of the FGDC Cadastral Data Content Standard is version 1.4. Federal Geographic Data Committee, 2008, Cadastral Data Content Standard for the National Spatial Data Infrastructure, Version 1.4, Subcommittee on Cadastral Data, Reston, Virginia.
In 2008 the first draft of the Cadastral Publication Guidelines was published as GIS schema. This document has been revised through the testing efforts from Wildland fire and the western US PLSS data set developed. The final version of the publication guidelines was completed in the Fall of 2009.
The Oregon GCDB Office will need to be contacted for complete data processing details
BLM Oregon State Office
P.O. Box 2965
BLM Oregon GCDB Manager reviewed the spatial and attribute data and found that the data continues to meet the needs of the Bureau of Land Management.
BLM, Oregon State Office
BLM Oregon GCDB Manager
P.O. Box 2965
GT-polygon composed of chains
The reference Grid is a generalized data set providing the Township and First Divisions of the PLSS as a separate feature class to support data requests, mapping and indexing. The spatial location and position and attributes of this feature class are the same as those in the primary data sets from which this data is built. These data are often used for map sheet layouts and general location reference
Internal feature number.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
Expiration date for the dataset. This is the date the data set is expected to be updated.
Concatenation of the principal meridian, township, range, and duplication code that form a unique id.
Code to indicate whether the first division is a duplicated.
Number, letter or designator for the first division of the PLSS Township.
Number, letter or designator for the nominal first division of the PLSS Township.
The reference to the source document could be a reference to a map or plat or a data set such as GCDB
Bureau of Land Management
GIS Data Management Specialist
P.O Box 2965
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.
Data are only available through the Oregon/Washington State office of the Bureau of Land Management.
Bureau of Land Management, Oregon State Office
P.O. Box 2965
FGDC Content Standard for Digital Geospatial Metadata