Data and Documentation
Montana PLSS CadNSDI Data Download
The CadNSDI is provided in geodatabase and shapefile format and represents the cadastral components of the Public Land Survey System (PLSS). The CadNSDI is published in NAD 83 HARN. A geodatabase in the State Plane Coordinate System is also available for download. Previous publications of the CadNSDI are available as Related Records.
Public Land Survey System Web Map Service
This shows the Montana Public Land Survey System of townships, ranges, sections, and section subdivisions. A Web Mercator version of the service is available.
CadNSDI PLSS Handbook
A handbook for GIS users of the CadNSDI Publication data set published by the FGDC Cadastral Subcommittee PLSS Work Group
CadNSDI Montana is the current, authoritative source for the most accurate GIS representation of the 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. Contact us to learn more about and to discover tools for adjusting other datasets to the CadNSDI.
- Fairfield, MT - Cadastral parcel data before and after December 2014 adjustment
CadNSDI Montana makes use of Montana’s Mapping 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.
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 annually according to FGDC Cadastral Publication Standards.
Adjusting Data to the CadNSDI
If you have data that partially aligns to the boundaries of the CadNSDI, you may want to adjust your data to the latest publication. In addition to the applications described in the section below, you can use the following feature layers in ArcMap or in ArcGIS Online to visualize and query where adjustments have taken place across the state as well as the status of current and future adjustments.
Metadata at a Glance - PLSSSPC
Montana CadNSDI Enhancement Projects Feature Layer
Via the Data Download, access sample materials and exercises to guide you through different adjustment processes, as well as customized conflation tools for semi-automated adjustments.
Montana CadNSDI Improvement Projects Story Map
Explore this story map to find out more about how the CadNSDI is adjusted and how other datasets rely on its accuracy.
PLSS Story Map
Published by the PLSS Work Group, this story map provides an overview of the PLSS and its components.
The interactive map below illustrates townships with proposed, active, or completed projects to improve the accuracy of the CadNSDI Montana data.The shaded townships on the map represent areas identified for PLSS accuracy enhancement work or where work has already been performed. Additionally, you can bring the Montana CadNSDI Enhancement Projects Feature Layer or the Metadata at a Glance - PLSSSPC feature layer into ArcMap by adding them from ArcGIS Online. If you have an area of interest that you believe needs accuracy improvement, please contact the State Library at email@example.com.
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