Cartography has a troubled history as a technology of power. The production and distribution of maps, often understood to be ideological representations that support the interests of their developers, have served as tools of colonization, imperialism, and global development, advancing Western notions of space and place at the expense of indigenous peoples and other marginalized communities. But over the past two decades, these marginalized populations have increasingly turned to participatory mapping practices to develop new, innovative maps that reassert local concepts of place and space, thus harnessing the power of cartography in their struggles for justice.