Cadastral

Data Construction

The parcel geometry data is maintained by the MT Department of Revenue (DOR) or in cases of Ravalli, Silver Bow, Cascade, Missoula, Lake, Flathead and Yellowstone counties the parcel geometry is maintained by the individual counties.

Once a month, the Cadastral theme lead at the Montana State Library integrates the DOR parcel data into a statewide database and then joins it to the DOR’s Computer Assisted Mass Appraisal (CAMA) data—a database that records property ownership, property value, and other information about each parcel of land in the state. Occasionally, data illustrating federal land swaps is transmitted and incorporated into Cadastral. Currently, there is one Theme Lead working 100% time on the dataset.