Free sources of data for North American Tribal regions.

Aboriginal Mapping Network
The Aboriginal Mapping Network is a collection of resource pages for First Nation mappers who are looking for answers to common questions regarding mapping, information management and GIS.

Federal and Indian Lands
Datset of federally and Indian administered lands of the United States that have any area equal to or greater than 640 acres. Agencies include the Bureau of Indian Affairs, the Bureau of Reclamation, the Bureau of Land Management, the Department of Defense, the Forest Service, the Fish and Wildlife Service, and the National Park Service.

Interior Columbia Basin Ecosystem
GIS datasets for reservations for tribes in the Pacific Northwest through the Eastside Ecosystem Project.

Managed Areas Database
MAD is a comprehensive GIS database for the conterminous United States which includes all types of managed areas.

Nunavut Environmental Database
Some GIS datasets for downloading concerning the Inuit of central and eastern Arctic.