This Day in Geography: September 14

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Listed here are significant events relating to geography that occurred on September 14. To suggest an event, please fill out the ‘This Day in Geography’ form.

1769

Widely acknowledged as one of the founders of modern geography, Alexander von Humboldt was born in Berlin, Germany in 1769. Von Humboldt traveled extensively through South America where he studied the flora, fauna, and topography of the continent. His Essay on the Geography of Plants was based on the then novel idea of studying the distribution of organic life as affected by varying physical conditions. Humboldt created the first isothermal chart (More: Early Data Visualization Pioneers).


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"Carte des lignes isothermes." by Humboldt, 1817. This map was the first to show the use of isotherms, a term Humboldt coined for lines of equal temperature.
“Carte des lignes isothermes.” by Humboldt, 1817. This map was the first to show the use of isotherms, a term Humboldt coined for lines of equal temperature.

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