From John Snow's cholera studies : 1855 map showing the water supply in London. The blue areas had a far greater mortality than the red areas

From John Snow’s cholera studies : 1855 map showing the water supply in London. The blue areas had a far greater mortality than the red areas

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‘Snow was convinced that the cholera was caused by contaminated water, and this map confirms it.

The red areas were from the Lambeth Water Company, who in 1852, changed water supply to Thames Ditton. These areas had five deaths per 1000 households.

The blue areas were from the Southwark & Vauxhall Water Company, served by water from the Thames at London Bridge, had a mortality rate of 71 deaths per 1000’–AJgloe

The sociodemographic development of Germany after reunification: - Population development - Employees subject to social insurance - Unemployment rate

The sociodemographic development of Germany after reunification: - Population development - Employees subject to social insurance - Unemployment rate

‘The second map really blew my mind. The East lost between 16% and 40% of its (basically) full-time employees between 1990-96. That’s quite insane’–CeterumCenseo85

1909 Ottoman Map of Beirut Vilayet and Mount Lebanon Mutasarrifate

1909 Ottoman Map of Beirut Vilayet and Mount Lebanon Mutasarrifate

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‘You can see the train tracks on the map which used to link Beirut with Damascus. What’s really cool is that many decades ago, the world wars and then the the civil war in Lebanon froze the old trains and train stations in time in Lebanon, and today, once you cross the eastern side of the coastal mountains in Lebanon, you can see the old abandoned train tunnels from the early 1900s used to protect the trains from the mountain snow’–Norcan987

Belgium gridded population

Belgium gridded population

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‘For those wondering, the three big cities responsible for that spike in the center are Antwerp (North), Brussels (Center) and Charleroi (South).

Also of note, in Wallonia, is the “sillon Sambre-et-Meuse”, the kind of line of higher population density going from the border with France to the border with the Netherlands/Germany, and passing through aforementioned Charleroi, as well as Liège (the big spot in the East). This region, following the rivers Sambre and Meuse (whence its name came) was the industrial heartland of Wallonia. Lots of coal mines, of steel industry. Now hit by unemployment as these sectors dwindled. Basically the rust belt of Belgium’–Pampamiro

River basins of Scandinavia and the Baltic states

River basins of Scandinavia and the Baltic states

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‘Out of Nordics, Sweden has the largest lake (Vänern; 5545km²) and Finland the second-largest (Saimaa, 4400km²). These are the largest and second-largest lakes in Europe (excluding Russia’s Ladoga; 18130km² and Onega 9700km²). Finland used to have half Ladoga before WW2. The Caspian Sea (371000km²) is in Asia and is the largest lake in the world … This guy lakes’