In his influential review, Deep Maps in Ecoliterature, scholar Randall Roorda argues that the deep map deserves status as an incipient genre of environmental literature, noting its ambitious ... self-reflexive nature and its innovative narrative architecture. The term deep map itself is the invention of writer William Least Heat-Moon, whose extended essay PrairyErth (a deep map) has given definition to this form. Deep-map writing is marked by its intertextual, interdisciplinary, and multivocal nature. It is also self-consciously cartographic, presenting maps, following maps, and redrawing maps. Deep mappers both distrust maps and rely on them, or as Heat-Moon puts it, they test the grid. As he follows the twenty-five United Stat...