Saturday, 2 January 2016

Flood maps reveal long-lost Roman roads across England.


Aerial flood maps have uncovered long-lost Roman roads across the UK.
Aircraft equipped with laser scanners have revealed several ancient tracks – including an 11-mile road connecting Ribchester and Lancaster.
Amateur archaeologists used special maps provided by the Environment Agency, which show areas at risk of flooding, to find the tracks which went unseen by the naked eye for hundreds of years.
The agency has been mapping the English landscape with lidar, light detection and ranging technology, for almost two decades – but the data was only made publicly available in 2013.
The lasers measure the exact distance between the aircraft and the ground, and is precise enough to show height differences of as little as five centimetres.