Abstract
This article recounts the development of an ongoing community-engaged research project that maps environmental injustice in Peterborough/Nogojiwanong, Ontario. Drawing insight and inspiration from the activism and scholarship in environmental injustice in Canada and a specific understanding of environmental injustice as slow violence, this project seeks to understand how community members experience environmental risk. In this article we explore two spatial methods we undertook to understand the landscape of environmental inequality in Peterborough: the development of an environmental injustice index using GIS mapping, complemented by participatory mapping with community members. In presenting the results of these interlinked mapping efforts, we make the argument that while both methods centred community needs, either taken alone would be insufficient to understand the complexity of environmental injustice in Peterborough. Instead, we call for environmental justice projects that combine both big and small data for research that is critical, community-engaged, and focused on justice.