Ph.D. Geography. University of Wisconsin–Madison. Awarded May 1990.
Dissertation: “Mapping and Empire: British Trigonometrical Surveys in India and the European Concept of Systematic Survey, 1799–1843.”
M.S. Cartography. University of Wisconsin–Madison. Awarded December 1985.
Thesis: “Politics, Science and Government Mapping in the United States, 1800 to 1925.”
B.Sc. (honors) Geography. University College London, University of London. First-class degree awarded August 1983.
Dissertation: “The Computer-Based Construction of Map Projections.”
University of Wisconsin–Madison (2005 to date)
Visiting Professor. Department of Geography. 1 September 2009 to date.
Director, History of Cartography Project. Department of Geography. 2005 to date.
University of Michigan, Ann Arbor (2004–2005)
Visiting Associate Professor. Program in American Culture. 2004–2005.
University of Southern Maine (1995 to date)
Professor. Departments of Geography-Anthropology and American & New England Studies. 1 September 2008 to date.
Osher Professor in the History of Cartography. 1 September 2007 to date. [endowed chair]
Associate Professor. Departments of Geography-Anthropology and American & New England Studies. 1995–2008. [unpaid leave of absence, 2004–2007]
Faculty Scholar. Osher Map Library and Smith Center for Cartographic Education. 1995 to date.
State University of New York at Binghamton (1990–1995)
Assistant Professor. Department of Geography. 1990–1995.