Influential geographers Dana Tomlin – developer of map algebra Edward Augustus Ackerman (1911–1973) - advocated for approaching human environment interaction as an interaction between systems. Fred K. Schaefer (1904–1953)- called for a scientific approach to geography based upon the search for geographical laws Michael DeMers (born 1951) – geographer that wrote numerous books contributing to geographic information systems Mark Monmonier (born 1943) – cartographic theorist that wrote numerous books contributing to geographic information systems Mei-Po Kwan (born 1962) - geographer that coined the uncertain geographic context problem and the neighborhood effect averaging problem. Michael Frank Goodchild (born 1944) – GIS scholar and winner of the RGS founder's medal in 2003 Richard J. Chorley (1927–2002) - played an instrumental role in bringing in the use of systems theory to geography. Roger Tomlinson (1933–2014) – the primary originator of modern geographic information systems Torsten Hägerstrand (1916–2004)- established the discipline of time geography Waldo Tobler (1930–2018) – coined the first and second law of geography William Bunge (1928–2013) - early quantitative geographer William Garrison (1924–2015) - Early leader of the quantitative revolution and one of the founders of regional science. Notes References Technical geography