Based on data from NASA / SEDAC, this map shows how Italy's population is distributed -- half lives in the densely-packed purple areas (8% of the land), half lives in the sparse grey areas (92% of the land).
The map is the latest addition to a long-running string of population maps tweeted out by Conrad Hackett, a Pew Research demographer with a very interesting and very popular Twitter feed. The maps show how and where people are concentrated in different regions of world, including contributions from some great data visualizers as well as a few of my own.
It's no surprise that people are not evenly spread out across the Earth. But seeing the population concentrations mapped out visually can be quite striking.
The map below shows the world's population density from another perspective. Only 5% of the world lives in the entire blue area. For comparison, the same number of people live in the small red area (bonus points if you can name the two countries it covers).
Of the United States' 3,142 counties, just 144 account for half of the population.
You can find these and many other population density maps on Conrad's Twitter feed, many connected to the tweet below. If you have any suggestions for other parts of the world whose population would be interesting to see visualized like the maps above, feel free to share your thoughts.
The post originally appeared on Metrocosm