
Gilberts pas seul (1958) of John Snows 1855 map of the Soho cholera outbreak showing the clusters of cholera cases in the London epidemic of 1854 While the basic elements of topography and grounding existed previously in cartography, the John Snow map was unique, development cartographic methods not only to depict but as well to analyze clusters of geographically dependent phenomena. The early twentieth cytosine saw the development of photozincography, which allowed maps to be split into layers, for pillowcase one layer for vegetation and another for water.! This was particularly apply for belief contours drawing these was a labour intensive chore but having them on a separate layer meant they could be worked on without the other layers to confuse the draughtsman. This work was originally careworn on glass plates but later plastic word-painting was introduced, with the advantages of organism lighter, using slight storage space and macrocosm less brittle, among others. When all...If you want to get a full essay, exhibition it on our website: OrderCustomPaper.com
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