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Surveyors working in the Gotthard Base Tunnel, longest tunnel in the world.
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Building the world’s longest tunnel tests advanced surveying technologies

June 17, 2010 rockman Comments Off on Building the world’s longest tunnel tests advanced surveying technologies

The Gotthard Base Tunnel will eventually be a 35-mile rail tunnel through the famed Alps in southern Switzerland. So what does it take to survey the world’s longest tunnel? How about setting some 7,000 points […]

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