Montana State Library 20250731 vector digital data Data are available in ESRI's geodatabase and shapefile formats. https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/AdministrativeBoundaries/ Montana State Library 20250526 https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/Boundaries/MapServer Tribal Nations Reservation Boundaries were digitized from the U.S. Geological Survey (USGS) 1:250,000 scale maps adjusted to be coincident with the Bureau of Land Management's Geographic Coordinate Database (GCDB) or the USGS 1:24,000 scale Digital Raster Graphics (DRGs). Where reservation boundaries are coincident with public land survey lines, they were copied from the BLM's GCDB. If boundaries were not coincident with GCDB lines, they were digitized on screen from the USGS DRGs. Reservation Boundaries will change as the GCDB is adjusted by the BLM and those data are imported into the Montana Cadastral Data Model. Montana Reservation Boundaries coincident with the BLM's GCDB or the USGS 1:24,000 scale Raster Graphics. For the mapping of Reservations within Montana The Montana State Library and the MSDI supports a federated database approach to all MSDI layers. Montana defines a federated approach as a method that supports the integration and utilization of data from multiple data providers, while retaining the primary maintenance responsibility with the provider. Most of Montana's framework data model efforts have adopted a federated approach that leverages multiple data providers and thus multiple data maintainers. It is plausible that errors do exist and we welcome all corrections. If you do have a boundary update/correction/question please contact the Administrative Boundaries Data Coordinator. 20250731 publication date Complete As needed -114.961134 -104.415105 49.068885 44.890709 ISO 19115 Topic Category boundaries None Montana Spatial Data Infrastructure Montana Reservations Governmental Units Montana Tribal Reservations reservations MSDI tribal reservations Montana Administrative Boundaries None Montana None Montana Reservation data is best used in conjunction with the GCDB, or other data based on GCDB. DISCLAIMER: The Montana State Library Geographic Information Services provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time. Montana State Library mailing and physical

PO Box 201800

1201 11th Ave

Helena MT 59620-1800 US 406-444-3115 406-444-4799 406-444-0266 https://msl.mt.gov For GIS assistance please submit a GIS Support Ticket: https://msl.mt.gov/geoinfo/Help/ US Bureau of Land Management, Geographic Coordinate Database, US Geological Survey 1:24,000 Digital Raster Graphics, U.S. Census Bureau Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595 Complete as of 04/10/09 Varies on GCDB accuracy U.S. Bureau of Land Management Billings, MT U.S. Bureau of Land Management, Montana/Dakotas Cadastral Survey http://www.blm.gov/mt/st/en/res/public_room/cadastral_survey/gcdb.html onLine Geographic Coordinate Database This is the source of all Montana Reservation lines that follow Public Land Survey lines. U.S. Geological Survey Helena, MT Montana State Library http://mslapps.mt.gov/Geographic_Information/Data/Topographic/Default.aspx 24000 onLine 1:24,000 scale Digital Raster Graphics Montana Reservation lines that do not follow Public Land Survey lines were screen-digitized from these images. Reservation boundaries when coincident with the PLSS were copied from original GCDB data downloaded from the Montana State BLM Office. Based on recent observations, this GCDB data varies somewhat from what is available at the Denver GCDB LSIS site and BLM needs to coordinate to ensure one standard version of GCDB. The boundaries that are not coincident with PLSS, rivers and other topographic features, were on screen digitized from the USGS raster graphics. Discrepencies were researched when encountered, however this is not meant to represent a legal survey of Reservation boundaries. unknown Updated the Crow Reservation Boundary. The boundary change is a result of the Crow Boundary Settlement Act of November 2, 1994 in which a portion of the East Boundary of the Crow Reservation was relocated to the 107th Meridian (NAD 83) 20171106 Adjusted reservation boundaries to the November 2018 CadNSDI Montana (PLSS) 20190208 Reviewed and updated boundaries to follow the U.S. Census Bureau; Added a unique identifier (ID_UK); Aligned to the 2021 CadNSDI; Projected to NAD83 2011 20210618 Added new fields: Tribe Number, Tribe Name, and Notes that has additional information about the Tribal Nations. 20220304 Adjusted boundaries to align with the CadNSDI public land survey system (PLSS) where appropriate. 20250731 Vector GT-polygon composed of chains 7 NAD 1983 2011 StatePlane Montana FIPS 2500 45.0 49.0 -109.5 44.25 600000.0 0.0 coordinate pair 0.0001 0.0001 meter D NAD 1983 2011 GRS 1980 6378137.0 298.257222101 BNDY_Reservations Reservation Boundaries of Montana SHAPE Feature geometry. ESRI Coordinates defining the features. NAME Reservation Name BMSC AIANNHCE10 PKEY ENTITY_ID DATASET_IDENTIFIER OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. LAST_UPDATE AIANNHCE AIANNHNS GEOID NAMELSAD LSAD CLASSFP COMPTYP AIANNHR MTFCC FUNCSTAT ALAND AWATER INTPTLAT INTPTLON ID_UK TRIBENUM TRIBE_NAME NOTES Acres AreaSqMi Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. Montana State Library mailing and physical

PO Box 201800

1201 11th Ave

Helena MT 59620-1800 US 406-444-3115 Montana Relay 711 406-444-0266 https://msl.mt.gov For GIS assistance please submit a GIS Support Ticket: https://msl.mt.gov/geoinfo/Help/ This is not a survey product. No liability is assumed by the State of Montana for the use of this product 20250731 Montana State Library mailing and physical

PO Box 201800

1201 11th Ave

Helena MT 59620-1800 US 406-444-3115 Montana Relay 711 406-444-0266 https://msl.mt.gov For GIS assistance please submit a GIS Support Ticket: https://msl.mt.gov/geoinfo/Help/ FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time