The cholera map of John Snow from 1854 solved the mystery of cholera by relating it to contaminated wells and pumps. It is also a classical example of GIS analysis. It has also become a paradigm for data journalism.
Now Snow's data are re-analyzed and mapped using R and Open Street maps. Here are two interesting maps.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2SNea8GurY4aP4i3Mu0Oc_yw3a23W1GxRCNpf0SZXDHaM1GnlGeWqkay7XtWZzVq_7fynleMUpCfdRB-lUKtc0N9s4hHJMyi8DmsqVlUyo0hIibAUhYj0tPSuENSd1obx1DF88P6kbDw/s1600/snow2.png)
Now Snow's data are re-analyzed and mapped using R and Open Street maps. Here are two interesting maps.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2SNea8GurY4aP4i3Mu0Oc_yw3a23W1GxRCNpf0SZXDHaM1GnlGeWqkay7XtWZzVq_7fynleMUpCfdRB-lUKtc0N9s4hHJMyi8DmsqVlUyo0hIibAUhYj0tPSuENSd1obx1DF88P6kbDw/s1600/snow2.png)
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