The boundary=aboriginal_lands tag should be used for mapping the official reservation boundaries of recognized aboriginal / indigenous / native peoples. These areas go by a variety of names in different countries, such as [W] Indian Reserves in Canada, [W] Indian Reservations in the United States, [W] Indigenous territory in Latin America, or [W] Territory of Traditional Natural Resource Use in Russia, to name some common examples. - в вики написано, что есть... Похоже, это земли манси, ханты и прочих оленеводов