ORBIS: The Stanford Geospatial Network Model of the Roman World

From http://orbis.stanford.edu/#

ORBIS: The Stanford Geospatial Network Model of the Roman World reconstructs the time cost and financial expense associated with a wide range of different types of travel in antiquity. The model is based on a simplified version of the giant network of cities, roads, rivers and sea lanes that framed movement across the Roman Empire. It broadly reflects conditions around 200 CE but also covers a few sites and roads created in late antiquity.

Learn more about the model and explore it at http://orbis.stanford.edu