George F. Jenks

George Frederick Jenks (July 16, 1916 – December 29, 1996) was an American geographer known for his significant contributions to cartography and geographic information systems (GIS). With a career spanning over three decades, Jenks played a vital role in advancing map-making technologies, was instrumental in enhancing the visualization of spatial data, and played foundational roles in developing modern cartographic curricula. The Jenks natural breaks optimization, based on his work, is still widely used in the creation of thematic maps, such as choropleth maps.

Career

Military

Jenks joined the United States Army Air Corps in 1941 after graduating with his bachelor's degree. Here, Jenks would grow the cartography program within the University of Kansas department of geography into one of the most influential in the country. As the concept of computer cartography was only introduced in 1959 by Waldo Tobler, Jenks publications were extremely influential in laying the foundation for GIS, thematic mapping, and modern cartography. The Kenneth Spencer Research Library at the University of Kansas maintains the "Personal Papers of George F. Jenks" and "George F. Jenks Map Collection."

Jenks natural breaks optimization method

One of the most influential concepts developed by Jenks in terms of applied cartography is the Jenks Natural Breaks optimization method. Jenks made a breakthrough with the development of the "Jenks Natural Breaks Optimization Algorithm," commonly known as the Jenks Natural Breaks Algorithm, in a 1967 paper. This algorithm is widely used in cartography and GIS to classify data into natural groupings, thereby enhancing the visual representation of data on maps. The algorithm optimally minimizes the variance within each group and maximizes the variance between groups, resulting in more effective data visualization. It is the default method for dividing classes in thematic maps such as choropleths in Esri software, such as ArcGIS. Citation for Meritorious Contribution to the Field of Geography, Association of American Geographers, 1952 Honors Award for Outstanding Achievement, American Cartographic Association of the American Congress on Surveying and Mapping, 1982 Master Teacher Award, National Council on Geographic Education, 1987