Bureau of Indian Affairs Mapped Tribal Land Parcels

BIA TAAMS Mapped Tribal Parcels depict tracts and parcels with Tribal or allotted ownership, organized by Land Area Code and Tract Number. The Division of Land Titles and Records compiled the data from the Trust Asset and Accounting Management System (TAAMS). The dataset is updated as mapped parcels are updated but does not represent a complete picture of all Tribal land.

Use Cases

• Analyze land ownership patterns by querying the 'Ownership' field for values 'T' (Tribal) and 'A' (allotted).
• Map the spatial distribution of Tribal tracts and parcels using the provided Land Area Code and Tract Number identifiers.
• Integrate parcel geometry with TAAMS system data to support land title and record management workflows.

Strengths

• Data is sourced from the Trust Asset and Accounting Management System (TAAMS), the official system of record.
• Provides multiple file formats including GEOJSON, KML, and CSV for flexibility in analysis.
• The dataset is actively updated as mapped parcels are changed, as of March 2026.

Limitations

• The dataset only includes mapped parcels and explicitly excludes unmappable parcels, making it incomplete.
• No specific row count, column list, or geographic scope is provided in the input metadata.
• Ownership data is limited to the binary 'T' and 'A' classifications without further detail.

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 BIA operations.

Freshness

Updated as mapped parcels are updated; last metadata update was March 3, 2026.

Geography

Tribal lands within the United States where parcels have been mapped.