,The BIA TAAMS Mapped Tribal Tracts and BIA TAAMS Mapped Tribal Parcels datasets depict tracts and parcels with Tribal ownership or are allotted. This dataset is organized y Land Area Code and Tract Number. This dataset is updated as mapped parcels are updated. This dataset only displayed mapped Tracts and Parcels and it may not be a full picture of Tribal Tracts and Parcels. If a parcel cannot be mapped for any reason, it may not be displayed in this dataset, thus this dataset should not be considered a complete picture of Tribal land. The BIA Mapped Tribals Tract and BIA Mapped Tribals Parcels servicesdisplay the same data. A parcel is a subdivision of a tract. Ownership is indicated in both the Tract and Parcel dataset in the 'Ownership' field. An Ownership value of 'T' indicates Tribally-ownership and an ownership value of 'A' indicates the tract and parcel is allotted. The Division of Land Titles and Records (DLTR) compiled the data to support the Bureau of Indian Affairs. The source information for tract data is the Trust Asset and Accounting Management System (TAAMS), which is the system of record.,

,The BIA TAAMS Mapped Tribal Tracts and BIA TAAMS Mapped Tribal Parcels datasets depict tracts and parcels with Tribal ownership or are allotted. This dataset is organized y Land Area Code and Tract Number. This dataset is updated as mapped parcels are updated. This dataset only displayed mapped Tracts and Parcels and it may not be a full picture of Tribal Tracts and Parcels. If a parcel cannot be mapped for any reason, it may not be displayed in this dataset, thus this dataset should not be considered a complete picture of Tribal land. The BIA Mapped Tribals Tract and BIA Mapped Tribals Parcels servicesdisplay the same data. A parcel is a subdivision of a tract. Ownership is indicated in both the Tract and Parcel dataset in the 'Ownership' field. An Ownership value of 'T' indicates Tribally-ownership and an ownership value of 'A' indicates the tract and parcel is allotted. The Division of Land Titles and Records (DLTR) compiled the data to support the Bureau of Indian Affairs. The source information for tract data is the Trust Asset and Accounting Management System (TAAMS), which is the system of record.,

,The BIA TAAMS Mapped Tribal Tracts and BIA TAAMS Mapped Tribal Parcels datasets depict tracts and parcels with Tribal ownership or are allotted. This dataset is organized y Land Area Code and Tract Number. This dataset is updated as mapped parcels are updated. This dataset only displayed mapped Tracts and Parcels and it may not be a full picture of Tribal Tracts and Parcels. If a parcel cannot be mapped for any reason it may not be displayed in this dataset, thus this dataset should not be considered a complete picture of Tribal land. The BIA Mapped Tribals Tract and BIA Mapped Tribals Parcels services display the same data. A parcel is a subdivision of a tract. Ownership is indicated in both the Tract and Parcel dataset in the 'Ownership' field. An Ownership value of 'T' indicates Tribally-ownership and an ownership value of 'A' indicates the tract and parcel is allotted. The Division of Land Titles and Records (DLTR) compiled the data to support the Bureau of Indian Affairs. The source information for tract data is the Trust Asset and Accounting Management System (TAAMS), which is the system of record.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

American Indian and Alaskan Native Land Area Representations. This Includes feature layer generated from running the Summarize Within solution. The data does not include Alaska and may not include all BIA LAR areas. This map is only intended to highlight areas that that include grasslands within tribal boundaries. The geographic acreages contained in this dataset are not derived from legal documents associated with title documents or survey records. Rather, they are computed by area calculation in the mapping software. It is important to note, area and distance calculations in the mapping software require that the data be in a projected coordinate system and that different projected coordinate systems can result in different calculated values for area or length. It is recommended that the Universal Transverse Mercator (UTM) Projection for the UTM zone where the data is contained be used to calculate area or distance. This viewer provides tools to assist with research, planning, and reporting. Land cover data is compiled from the European Space Agency (ESA) as part of their Climate Change Initiative (CCI). The ESA CCI data is as current as 2019 and can be found within ESRI’s living atlas. Land Area Representations of tribal boundaries and the BIA regions represented in this dashboard were created by the BIA. Please feel free to contact BOGS at 1-877-293-9494 geospatial@bia.gov

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,