What was once the preserve of the military has now become available to all of us. Infoterra - a company that specialises in processing satellite imagery - has been storing and cataloguing 3,000 terrabytes of imagery compiled over the last 25 years.

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Story: Photographing the Earth

Duration: 2:38

What was once the preserve of the military has now become available to all of us. Infoterra - a company that specialises in processing satellite imagery - has been storing and cataloguing 3,000 terrabytes of imagery compiled over the last 25 years.

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