The dazzling map that changed the world

2015 marks the 200th anniversary of the first geological map of England and Wales, created and painted by a humble Oxfordshire surveyor, William Smith.

The Posers Podcast about Smith’s surprising story is now available to hear featuring comedian Richard O Smith – and an enormous sandwich.

Over the last few weeks I’ve been working with the expert team at the Natural History Museum of Oxford University, helping to tell the little-known stories behind Smith’s archives for a new exhibition.

Atlas version of Smith’s giant geological map

William Smith spent his childhood collecting fossils, and his career travelling the country as a surveyor. But how did he make the leap to representing the Earth’s three-dimensional rocky layers, or strata, so vividly on a two-dimensional sheet of paper? This is what we wanted to explore using the museum’s collection of rare maps, personal papers, fossils and tools.

Smith’s diary of 1789 reveals his first professional surveying jobs

The exhibition, which runs until the end of January 2016, looks at the work and life of Smith, the ‘father of stratigraphy’ – and examines how Smith still influences geologists today as they unlock the Earth’s secrets. As I wrote the text, I was able to pick the brains of Kate Diston, the Museum’s Head of Library and Archives, and geologist Paul Smith, the Museum’s Director and the first person to map Greenland. I also interviewed Mike Searle, who is uncovering the geology behind Everest and the devastating earthquake that hit Nepal earlier in 2015. Mike told me: “I still map the way William Smith would have done: map, compass, hammer and hand lens. I do carry GPS but you don’t really need it if you can read a map.”

Why were Smith’s maps so important? Visitors can explore the answer

As background research I also spent a splendid day with Richard O Smith and Bill Snow, exploring William Smith’s home village of Churchill, where there is now a memorial to his achievements as well as a heritage centre open in the summer months. Richard and I are now working on a podcast about Smith’s ground-breaking discoveries, digging deeper into his story with the help of the Museum archives – and an enormous sandwich.

Memorial at Churchill, Smith’s childhood home

During most of his lifetime, Smith’s breakthroughs were overlooked by a snobbish establishment, as Simon Winchester explained in his lecture accompanying the exhibition. Further events are planned including a lecture by Mike Searle.

There’s plenty to delve into, discuss and learn – so that in the future William Smith’s discoveries can be remembered in the glowing colour they deserve.