Tag: World

• How deep is the sea? The ocean floor, its trenches and seamounts, on one map

  

  A map of the floor of the whole ocean, sharp from ocean basins to seamounts. The average sea floor lies 3,675 m down, 74% of it is abyssal, the Challenger Deep would hide Everest with 2,086 m to spare, and only 28.7% of the floor is mapped to modern standards.

  Tristan Hotham

  Data stories, Games & other interests

  coast and sea, Data bias, Hills and mountains, landscape, maps, Oceans, Present day, Terrain model, World, world maps

• Ptolemy’s world, measured

  

  Ptolemy wrote the ancient world down as a table of coordinates. I matched 2,358 of his places to where they really are: shrink his longitudes by 0.72 and the map falls into place, but Scotland is still turned on its side and Sri Lanka is 15 times too big.

  Tristan Hotham

  Data stories, Games & other interests

  Europe, history, Map accuracy, old maps, Pleiades, Roman, Romans, World, world maps

• Ghost towns of the world: where places were abandoned, and why

  

  I mapped 5,448 abandoned settlements in open data and coloured each by why it emptied: mining, war, disaster, reservoirs, Chernobyl and medieval decline. 80% of Wikidata’s ghost towns are American, and only 5% say why.

  Tristan Hotham

  Data stories, Games & other interests

  history, medieval, cities, population, industry, world maps, Classification, Data bias, Lost places, Twentieth century, Wikidata, Wikipedia, World

• In the shadow of the volcano: who lives near the world’s volcanoes

  

  I mapped all 1,215 of the world’s Holocene volcanoes and the people around them. At least 147 million people live within 30 km of one, and 76 volcanoes have a million or more neighbours.

  Tristan Hotham

  Data stories, Games & other interests

  Data bias, Geology, landscape, Natural hazards, population, Present day, World, world maps

• When did your country lose 11 days? Four great switches, mapped

  

  Britain lost eleven days in 1752, Russia thirteen in 1918, and Saudi Arabia switched its civil calendar only in 2016. I mapped when every country the sources date changed calendar, side of the road, units and votes for women.

  Tristan Hotham

  Data stories, Games & other interests

  Animated timeline, Clocks and calendars, Early modern, Europe, Government, history, maps, Place search, Twentieth century, Wikipedia, Women and gender, World, world maps