New digital map shows Roman Empire’s vast network of roads

A new open digital data set and map of the Roman Empire shows that it contained some 300,000 kilometres of road.

It’s no secret that the Romans liked to build roads. But European researchers say they’ve discovered an extra 100,000 kilometres that had been hidden over time, covered by new construction or fallen into disuse.

Using the oldest satellite surveys, topographical maps and software, they have revealed that the Empire was the…