From 1882 to 1890, he made two trips to South America.In 1895, he founded Geography Magazine and served as editor in chief for a long time.He was a professor of Heidelberg University.Traveled to Russia, North Africa and Asia.Hertner emphasized the regional characteristics of geography.His《Geography: Its History, Nature and Methods》, describing the history, nature, tasks, research methods, composition of concepts and ideas, maps and pictures, text expression andGeography Education The systematic exposition of geographical theory is his representative work of geographical thought.He also wrote the Fundamental of Regional Geography.
