You might want to check out Mark Plotkin's site and/or contact his organization via http://www.amazonteam.org./ His NGO not only maps indigenous lands in the Amazon to protect them and the tribes' ways of life, but he also teaches the tribes to use GPS mapping equipment so they can help their neighbors. I'm sure they would be glad to direct you to the resources you seek. Good luck!
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You might want to check out Mark Plotkin's site and/or contact his organization via http://www.amazonteam.org./ His NGO not only maps indigenous lands in the Amazon to protect them and the tribes' ways of life, but he also teaches the tribes to use GPS mapping equipment so they can help their neighbors. I'm sure they would be glad to direct you to the resources you seek. Good luck!