Community geographic features change over time, and this change can be contentious. Understanding social
responses to this change is important for policies related to adaptation to climate change. This paper examines
the use of participatory mapping of resources, at two time points, in a Tanzanian community. The results of our
mapping (May 2015) were compared to those by a report by the United Nations Food and Agriculture
Organization (2009). Differences included boundaries, land use designations and accessibility. These discrepancies
may reflect actual changes in resources and livelihoods over time, but also differences in researcher
trust and the enabling of participants. Findings suggest that repeated participatory maps, conducted in a trusting
environment, are required for long-term planning in places experiencing both climate and social change.