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Craig Candler, Rachel Olson, Steven DeRoy, and Kieran Broderick document the history of PGIS practice in the Treaty 8 area of British Columbia, Canada. PGIS practice often evolves to address specific issues being faced by a community. This means that multiple tools might be used together, or in sequence to deal with those issues. The authors describe the range of different practices from community mapping through to PGIS development and application, and methodologies used. The authors identify the Treaty 8 area as a critical site for learning about sustained, as well as sustainable, practice.

Participatory Learning and Action (PLA, formerly PLA Notes) is the world's leading series on participatory learning and action approaches and methods. PLA publishes articles on participation aimed at practitioners, researchers, academics and activists. All articles are peer-reviewed by an international editorial board. See: www.planotes.org

Article in: PLA 54. Guest-edited by: Giacomo Rambaldi, Jon Corbett, Michael K. McCall, Rachel Olson, Julius Muchemi, Peter Kwaku Kyem, Daniel Wiener, Robert Chambers