Christmas Card-o-gram 2017: Aurora meets GDP

This year’s christmas card-o-gram blends a view of northern lights (captured near Höfn, East Iceland) with a cartogram of global GDP distribution in 2017:

Christmas Cartogram Card 2017
Wishing everyone a Happy New Year!

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Connecting people: A world map of undersea cables

Despite satellite technology, global communication heavily relies on undersea cables to keep people connected. “A submarine communications cable is a cable laid on the sea bed between land-based stations to carry telecommunication signals across stretches of ocean.” (Wikipedia) Undersea cables are the backbone of the internet, so that being connected determines a region’s ability to participate in global communication flows.
The following cartogram shows data from Greg’s Cable Map reprojected onto an equal population projection, giving a perspective of how people rather than land areas are connected to the global communications infrastructure. Landing points where the cables connect to land are marked as red dots in the map, while the background also shows very faded shipping lanes (over sea) as well as the gridded cartogram projection (over land):

Cartogram of undersea cables shown on an equal-population projection
(click for larger version)

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Under the spreading chestnut trees

Chestnuts roasting on an open fire” has become a popular notion of Christmas ever since Tormé and Wells wrote their Christmas Song, made famous by Nat King Cole‘s recording in 1946. The chestnut has seen a decline in use over the centuries in Europe, having been brand-marked as ‘food for poor people’. But almost all across the continent (likewise in North America) it now also sees a revival in popularity in Winter time, especially around Christmas. Global chestnut production has constantly been rising, growing from almost 650,000 tons in 1993 to over 2 million tons in 2013 according to FAOSTAT figures. And while the chestnuts roasting on an open fire have their origin in the United States, chestnuts consumed there have often traveled a long way. Although growing conditions are ideal, the USA have no significant chestnut industry and account for less than 1% of the global chestnut production. This is different in Europe where commercial chestnut farming takes place in the Mediterranean, which, however, is challenged by the now top chestnut producer China. China now produced almost 85% of the world’s chestnuts.
The following gridded cartogram is a visualisation of the areas in the world where chestnuts are grown. Using data produced by EarthStat the map shows each grid cell resized according to the total amount of chestnuts produced in that area:

Map of World Chestnut Production
(click for larger version)

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Nativity map: The Census of Quirinius revealed

The first two chapters of the Gospel of Luke in the Bible state that the birth of Jesus took place at the time of the census: “In those days a decree went out from Emperor Augustus that all the world should be registered. This was the first registration and was taken while Quirinius was governor of Syria. All went to their own towns to be registered.”
Believing in the religious background of the nativity story or not, evidence for the Census of Quirinius following Caesar Augustus’ decree exists beyond the bible. However, despite all recent initiatives to open up public data, the Census results of back then have not seen the light of day…until now!
This Christmas we can reveal the results of the Census of Quirinius following a freedom of information request to the Roman Empire (well, and following some more in-depth analysis within the Worldmapper project using Angus Maddisons studies). This is how the world looked in the year 1 CE (3761 Hebrew calendar, Mayan calendar, 544 Buddhist calendar):

(click for larger version)

Wishing everyone a happy new year!

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