Bureau of Indian Affairs Mapped Tribal Land Tracts and Parcels

Bureau of Indian Affairs datasets depict tracts and parcels with Tribal ownership or allotted status, organized by Land Area Code and Tract Number. The data is compiled by the Division of Land Titles and Records from the Trust Asset and Accounting Management System (TAAMS) and is updated as mapped parcels are revised.

Use Cases

• Analyze land ownership distribution by querying the 'Ownership' field for values of 'T' (Tribal) or 'A' (allotted).
• Map the spatial organization of tribal lands using the Land Area Code and Tract Number attributes.
• Identify parcels that are subdivisions of tracts to study land tenure patterns.

Strengths

• Data originates from the Trust Asset and Accounting Management System (TAAMS), the official system of record.
• Ownership is explicitly indicated in a dedicated field with clear categorical values.
• Multiple file formats (GEOJSON, KML, CSV) are available for different analytical needs.

Limitations

• The dataset only includes mapped tracts and parcels, potentially omitting unmapped areas and providing an incomplete picture of tribal land.
• Data may not be current for all areas as updates occur only when mapped parcels are revised.
• The specific spatial and temporal coverage of the data is not documented in the input.

Provenance

Source

Trust Asset and Accounting Management System (TAAMS), compiled by the Division of Land Titles and Records (DLTR) for the Bureau of Indian Affairs.

Collection Method

Compiled from the system of record (TAAMS) to support Bureau of Indian Affairs activities.

Freshness

Updated as mapped parcels are updated; last platform update was 2026-03-03.

Geography

Tribal lands within the jurisdiction of the U.S. Bureau of Indian Affairs.