CadNSDI Montana

Map of public land survey data near Polson, MontanaData and Documentation


CadNSDI Montana is the current, authoritative source for the most accurate GIS representation of the Public Land Survey System (PLSS). The name “CadNSDI” comes from the FGDC’s Cadastral Subcommittee. Custodianship of CadNSDI Montana (Montana’s PLSS dataset) was assumed by the Montana State Library in the spring of 2014, taking over the adjustments and publication of the data from the US Bureau of Land Management (BLM).

This dataset supports the development of Montana’s Cadastral Framework as well as other Montana framework datasets built upon the PLSS geography. CadNSDI Montana makes use of Montana’s Geodetic Control Framework as the basis of its coordinates in areas where geodetic control is available. This dataset will continue to be adjusted and improved. Proposed accuracy adjustments will be reviewed by the Montana PLSS Change Management Advisory Work Group—a working group of the Montana Land Information Advisory Council. Documentation on the change management process can be found via links on this page.

Dataset Transition from BLM Stewardship to the State Library

The PLSS data was received from the BLM in March 2014 and it was migrated into the Esri Parcel Fabric format. The data are published in FGDC approved CadNSDI format.

CadNSDI Montana Improvement Projects

The interactive map below illustrates townships with active or proposed projects to improve the accuracy of the CadNSDI Montana data. We will publish the data annually based on updated control points and accompanying adjustments. The shaded townships on the map represent areas identified for PLSS accuracy enhancement work or where work has already been performed. Click on the button above the map to see the legend. Click on a township to see information about the township and the status of improvement proposals. If you have an area of interest that you believe needs accuracy improvement, please contact the State Library at

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