Public Land Survey System Data
Public Land Survey System (PLSS) is the cadastral reference data theme that provides a graphic basis for legal land descriptions in GIS as well as mapping the rights and interests in land. Where federal interests and rights exist the Bureau of Land Management (BLM) is the legally identified authority and Data Steward for the PLSS under the Office of Management and Budget (OMB) Revised Circular A-16. Individual States and Counties have authority and/or data stewardship where no such federal interests or rights exist. In this map service, the PLSS data is contributed by both BLM and Alternative sources.
The PLSS is a method used in the United States to survey and identify land parcels, particularly for titles and deeds of rural, wild or undeveloped land. Its basic units of area are the township and section (First Division and Second Division)
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. 
The data represented here include the following: 
• PLSS Townships – These are rectangular grids that are approximately 6 miles square.
• First Divisions – Also referred to as sections is a one-square-mile block of land which is approximately one thirty-sixth of a township. Due to the curvature of the earth, sections/first divisions may occasionally be slightly smaller than one square mile.
• Second Divisions – A quarter-quarter section or sixteenth of the first division. It represents the smallest division in the hierarchical break down of the PLSS Rectangular surveys.
The data has been reprojected from GCS_North_American_1983 to WGS_1984_Web_Mercator_Auxiliary_Sphere.
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