Wealth map of the world

Posted by GIS talk On Monday, September 29, 2008
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When you look at the map of the world, what do you see? Probably a cosy agglomeration of nations that is imprinted on your brain – reinforced time and time again from its pride of place on everything from classroom wall to newspaper graphic to in-flight magazines.

This projection of the Earth – a great mass of Russia across the top, a slightly oversized UK on the edge of Europe, impenetrable China and Mongolia on the right, the expanse of America on the left, with Africa centre-bottom – is an image as strong as the Union Jack, the London Underground logo or the Olympic rings. Except it represents only a basic truth about the world, one that has been with us in essentially the same form since the Flemish cartographer Gerardus Mercator created his Mercator projection in 1569.

Now, though, three academics – a professor and research assistant from Sheffield and another professor from the University of Michigan – have produced The Atlas of the Real World, a book that at first glance looks like a whole bunch of world maps on acid.

Except, you could argue, that these warped representations come closer to the truth about our planet than the originals on which they’re based.

Daniel Dorling, professor of human geography at the University of Sheffield, Mark Newman, assistant professor of physics and complex systems at the University of Michigan, and Anna Barford, research associate at Sheffield, have created the website www.worldmapper.org, on which the book is based, which bends and twists our continents according to statistics such as the number of elderly, international immigrants, grocery imports and even ¬demonstrations against the war in Iraq.

It was to overcome these problems that Dorling and his colleagues set about creating cartograms that offer up an image of a new world order in which the distribution of the planet’s rich and poor, drinking water, weapons and trade can be seen at a glance.

He and the www.worldmapper.org team who published The Atlas of the Real World identified regions – but not exact continents – from Western Europe to Japan to South Asia to northern Africa and colour-coded them, with the nations within them given different shades of that colour. Then, using statistics, principally from the United Nations but also other bodies including the World Bank, the CIA and the World Health Organisation, they manipulated the images so that regions expanded and contracted in relation to each other.

So when figures on net immigration, for example, are inputted to the worldmapper model, the USA and the UK become huge and bloated, while Africa and China almost disappear. Conversely, on a map of absolute poverty, Europe is all but invisible while Asia expands massively.

The book contains 366 cartograms – the last one, almost charmingly, illustrating invertebrates at risk – that not only show us what we’d expect in the divisions in wealth, but also ignite surprising flares of unexpected social phenomena.

So the map depicting decline in wealth, for example, showing the decline in GDP from 1975 to 2002 adjusted for local purchasing power, has the US, Western Europe and Japan all but invisible, but a hugely inflated Eastern Europe.

While we might think that the end of Communism brought about huge increases in some ex-Soviet satellite nations, countries such as the Ukraine, Slovenia, the Czech Republic and Poland actually lead the way in the largest declines in wealth. (China, surprisingly, hasn’t been affected in the same way.)

These images then allow us to draw what might otherwise be hidden conclusions about the world in which we live. A refugee map, for example, won’t, as you’d expect, display a greatly enlarged West. “Most refugees go over national rather than international borders,” explains Dorling. “The implication is that the burden on Africans to look after refugees is as great as it is for us.” An obvious contemporary example would be Zimbabweans in South Africa. The maps have applications in advocacy, too. A map showing how many votes nations get in the International Monetary Fund was used by African countries who wanted greater representation.

Interestingly, when you zoom in on an area, it reverts to how it would look on a regular map, with its normal place on lines of latitude and longitude.

It is only as you pull out that those lines distort and the reader is given this vision of the world.

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