Charting the Unknown takes readers back more than four decades to the Harvard Laboratory for Computer Graphics and Spatial Analysis where a variety if professionals converged to rethink thematic mapping, spatial analysis, and what we now call GIS. The book includes a CD that contains interviews with important figures at the Harvard Laboratory, three movies showing animated, visualization, and scanned copies of Context publications (from 1968 to 1983) describing research-related activities at the Lab.