Rivers are the ostensible subjects of Wopo Holup's drawings, but not in any conventional sense. As they were for Thoreau, rivers are Holup's point of departure for the investigation of an expansive range of questions and concerns-aesthetic, scientific, historical, and ecological. Derived from satellite imaging systems, Holup's drawings present themselves as a kind of hand-crafted, subjectivized mapping, a personalized rendering of landscapes originally captured by a data-driven, all-seeing eye.