Amazonian Peoples Use GPS to Protect Their Land.

Members of the Sipaliwini of south-central Suriname plan a mapping
expedition that will use global positioning system (GPS) technology to
define their ancestral territories.

Native Indian groups throughout the Amazon rain forests of South America are increasingly threatened by development. So activist groups are helping the tribes fight back by providing them with technology and training to create maps that will aid their negotiations with companies and local governments. -- National Geographic via Anthropology.net