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). The Jenks natural breaks optimization, based on his work, is still widely used in the creation of thematic maps, such as choropleth maps.
Also recorded as George Frederick Jenks
George F. Jenks
- Birth Name
- George Frederick Jenks
- Born
- 16 July 1916
- Birthplace
- Oneonta, New York, U.S.
- Died
- 29 December 1996
- Occupation
- Geographer
- Known for
- Jenks natural breaks optimization
- Education
- New York State College for Teachers (BEd) Syracuse University (MA, PhD)
- Nationality
- United States
VALÉORINE Encyclopedia
VALÉORINE documentary reading
Documentary summary
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). The Jenks natural breaks optimization, based on his work, is still widely used in the creation of thematic maps, such as choropleth maps.
Admitted source layer · organised and presented by VALÉORINE
Reference Check
Propose documentary evidence for George F. Jenks. A contribution is never written directly as fact: identity, source, rights and evidence gates still decide.
Sign in to contribute
World of VALÉORINE
Documentary connections
Only confirmed graph relationships appear here. Images are shown only when their identity and reuse rights both pass the documentary gate.
Documentary evidence
Documentary basis
Authority files
wikidata · Q120969962 · wikipedia · George F. Jenks
In this article
Key facts
Key facts
• Birth Name — George Frederick Jenks • Born — 16 July 1916 • Birthplace — Oneonta, New York, U.S. • Died — 29 December 1996 • Occupation — Geographer • Known for — Jenks natural breaks optimization • Education — New York State College for Teachers (BEd) Syracuse University (MA, PhD) • Thesis Title — New Land Development in the Rice Economy of the Weiner Area, Arkansas • Thesis Url — https: archives.lib.ku.edu/repositories/3/archival_objects/382842 • Discipline — Geography • Sub Discipline — Agricultural geography, Cartography • Workplaces — University of Arkansas University of Kansas
Education and field
Education and field
George F. Jenks earned his B.S.Ed. in 1941 from the New York State College for Teachers (now University at Albany). He earned both his M.S. and Ph.D. in geography from Syracuse University in 1947 and 1950 respectively. Jenks initially focused his research on agricultural geography which formed the subject of both his master's thesis and doctoral dissertation, with his dissertation being titled "New Land Development in the Rice Economy of the Weiner Area, Arkansas." After being exposed to Richard Edes Harrison as a cartography instructor, Jenks shifted towards researching cartography. This interest led Jenks to become one of the most influential cartographic researchers of the 20th century.
Military
Military
• Illustration — Branch insignia of the Army Air Corps Jenks joined the United States Army Air Corps in 1941 after graduating with his bachelor's degree. During World War II, he served as an instructor of aerial navigation, holding the highest rank of First lieutenant. Jenk's time as an instructor of aerial navigation inspired him to pursue a career in geography.
Academic
Academic
After his time in the military, Jenks went to graduate school at Syracuse University to study geography. After graduating from Syracuse University, Jenks's first position was at the Department of Rural Economics and Sociology at the University of Arkansas. In 1949, Jenks took a position in the Geography Department at the University of Kansas. Here, Jenks would grow the cartography program within the University of Kansas department of geography into one of the most influential in the country. Throughout his career, Jenks advocated for improved curriculums for cartographers and a greater focus on the science of applied mapping. Jenks retired from the University of Kansas in 1986. While Jenks publications and research were highly influential, he is noted to have focused much of his energy on helping his graduate students. These students carried his influence into other geography departments across the United States, shaping how cartographic training is accomplished. He continued to work with graduate students at the University of Kansas even after his retirement in 1986.
Life and career
Dated record
Life and career
Explore 1916–1996
The full dated record · 3 entries
1916
George F. Jenks was born in 1916 at Oneonta.
1967
Vertical exaggeration in three-dimensional mapping [by] George F. Jenks [and] Fred C. Caspall is dated 1967.
1996
George F. Jenks died in 1996.
Jenks natural breaks optimization method
• Illustration — Choropleth map showing estimated percent of the population below 150% poverty in the Contiguous United States by county, 2020 that uses the Jenks natural breaks classification 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. This method has limitations, and alternative methods for dividing classes include quantiles, standard deviation, and equal interval.
Research and Publications
• Illustration — Main Entrance of the Kenneth Spencer Research Library, University of Kansas, Lawrence, Kansas Jenks early publications focus on his interest in agricultural geography. After receiving a grant award from the Fund for the Advancement of Science, Jenks research shifted towards improving cartography, both in terms of map production and training of cartographers. This led to decades of publications focused on human error introduced into maps by cartographers, generalization introduced during the mapping process, eye movement, three-dimensional mapping, geostatistics, and thematic mapping in general. 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."
Awards
• Faculty Fellowship, Fund for the Advancement of Education, 1951-52 • 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 • Named Fellow, the American Association for the Advancement of Science, 1987 • Master Teacher Award, National Council on Geographic Education, 1987
Literature
Literature
A SYNOPSIS OF GEORGE F JENKS' CAREER, Cartographica, 1987
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Gilmartin, Patricia P. A Synopsis of George F Jenks' Career. Cartographica. 24. 2. 128–135. 1987. 10.3138/L335-R134-53WN-05K2.
- 2.Karan, P.P. Leaders in American Geography Volume II: Research. New Mexico Geographical Society. 138–145. 2000. 0-9643841-1-6.
- 3.McMaster, Robert. In Memoriam: George F. Jenks (1916–1996). Cartography and Geographic Information Systems. 24. 1. 56–59. 1997. 10.1559/152304097782438764.
- 4.Jenks, George. An Improved Curriculum for Cartographic Training at the College and University Level. Annals of the Association of American Geographers. 43. 2. 317–331. December 1953. 10.2307/2560899.
- 5.McMaster, Robert. A History of Twentieth-Century American Academic Cartography. Cartography and Geographic Information Science. 29. 3. 305–321. 2002. 10.1559/152304002782008486.
- 6.George F. Jenks map research projects collection. Kenneth Spencer Research Library Archival Collections.
- 7.White, Travis M. Inside Spencer: The KSRL Blog. Kenneth Spencer Research Library.
- 8.Jenks, George F. Generalization in Statistical Mapping. Annals of the Association of American Geographers. 53. 1. 15–26. 1963. 10.1111/j.1467-8306.1963.tb00429.x.
- 9.Jenks, George F. Error on Choroplethic Maps: Definition, Measurement, Reduction. Annals of the Association of American Geographers. 61. 2. 217–244. 1971. 10.1111/j.1467-8306.1971.tb00779.x.
- 10.Jenks, George F. LINES, COMPUTERS, AND HUMAN FRAILTIES∗. Annals of the Association of American Geographers. 71. 1. 1–10. 1981. 10.1111/j.1467-8306.1981.tb01336.x.
- 11.Slocum, Terry A. The History of Cartography, Volume 6: Cartography in the Twentieth Century. University of Chicago Press. 2015. 978-0226152127.
- 12.Waldo, Tobler. Automation and Cartography. Geographical Review. 49. 4. 526–534. 1959. 10.2307/212211.
- 13.White, Travis M. The George F. Jenks Map Collection. Cartographic Perspectives. 91. 2018. 10.14714/CP91.1516.
- 14.Jenks, George F. 1967. "The Data Model Concept in Statistical Mapping," International Yearbook of Cartography 7: 186–190.
- 15.Jenks natural breaks classification method. CDC National Center for Health Statistics. 8 August 2022.
- 16.Data classification methods. ESRI.
- 17.Jenks, George Frederick. The Online Collection and Catalog of Rockefeller Archive Center.
- 18.AAG Honors.
- 19.Historic Fellows Listing. American Association for the Advancement of Science.
References
Citations
References
Each reference names the institution holding it, so a reader may go to the document itself.
reference work
Secondary witnessreference work
Secondary witness
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 16 August 2026.
Elsewhere in Maps and atlases
1,180 published records in this field, each with its sources named.
- George ArmstrongAuthor
- George Bickham the YoungerAuthor
- George BradshawAuthor
- George EverestAuthor
- George GauldAuthor
- George Henry RichardsAuthor
- George KishAuthor
- George LilyAuthor
Best supported in this field
For owners
Own a work by George F. Jenks?
A specialist will read what you send and tell you what the house can establish, what it cannot, and whether the object is suited to sale. There is no charge and no obligation. The object stays with you throughout; nothing is shipped to us unless it is arranged in writing beforehand.