page_title: Comparison diagram
section_title: Origins
hierarchical_section_title: Comparison diagram / History / Origins
caption_attribution_description: Deutsch: Ideen zu einer Geographie der Pflanzen nebst einem Naturgemälde der Tropenländer Français&#160;: Tableau physique de Humbold. Ce diagramme, publié dans Essai sur la géographie des plantes, 1807, présente une vue en coupe des volcans Chimborazo et Cotopaxi avec la répartition selon l'altitude de leur végétation. Humbold a par la suite apporté plusieurs corrections à ce travail. Après réanalyse des échantillons, il s'avère que la végétation décrite était celle du mont Antisana [Pierre Moret et al., 2019].
context_page_description: Comparison diagram or comparative diagram is a general type of diagram, in which a comparison is made between two or more objects, phenomena or groups of data. A comparison diagram or can offer qualitative and/or quantitative information. This type of diagram can also be called comparison chart or comparison chart. The diagram itself is sometimes referred to as a cluster diagram.
context_section_description: Comparison charts originate from the late 18th century and early 19th century. One of its roots are the 18th century nautical chart, which could offer a comparison of shore or coastal profiles. These were made popular by the English cartographer and a publisher of maps William Faden (1749–1836).
  Another root of comparison diagrams are the earliest thematic maps. Late 18th century August Friedrich Wilhelm Crome published one of the first economic thematic map. His "Groessen Karte von Europa" from 1785 compared the sizes of all then existing European countries. This work inspired later scientist, such as Alexander von Humboldt in Germany, and Charles Dupin in France. in their works. In France in 1872 Charles Louis de Fourcroy presented a similar diagram, which he named "Table Poléométrique" (Poleometric Table).
  Early 19th century, Alexander von Humboldt was one of the first to picture various cross sections of mountains, including for example the "limit of perpetual snows at different latitudes," or the different kinds of vegetation on different heights. Much of this work was published in the 1914 "Atlas géographique et physique des régions équinoxiales du nouveau continent." In 1805 Von Humboldt had published a map (see image), entitled "Ideen zu einer Geographie der Pflanzen nebst einem Naturgemälde der Tropenländer" (Ideas for a geography of plants, together with a nature paintings of the tropics) in which he made a comparison of the different types of plans in the tropics, and the heights on which they grew.
caption: Alexander von Humboldt's Ideas for a geography of plants, together with a nature paintings of the tropics,  1805.
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