TreeKIT builds tools to help city dwellers measure, map, and collaboratively manage urban ecosystems. The project is focused on high density urban areas where the links between human and non-human health are most clearly evident. Mapping street trees introduces people to the neighborly “charasmatic megaflora” (AKA trees) living on their city block and quietly contributing many ecosystem services and raising property values. Through TreeKIT’s educational mapping workshops, we aim to promote long term stewardship of the urban forest, one tree at a time.