This map indicates various Roman features throughout the whole of Roman Britain; towns and settlements, villas, temples, shrines and other buildings, roads, forts and temporary camps, mineral and salt mines, pottery manufacturing locations and so on, as well as the Roman names for the tribes living in each region.
The information is superimposed on top of a greyed modern map, with some modern names in full type where a Roman site corresponds to a modern location, but at times it can look a little cluttered and it's not always easy to see which familiar corresponding modern locations are near to what you are looking at. Unfortunately there's no indication of the English names which have been subsequently applied some of the roads (Watling Street, Ermine Street, Akeman Street, Fosse Way), which would have been helpful. The lack of an indication of the presumed coastline in Roman times, which can differ significantly, is a minor deficiency.
Personally I could have done without the "extraneous" information, large areas of text and photographs concerning Roman religion, towns, industry, communications and so on, very much aimed at the initiate, which are plonked all round the edge of the map, and would have preferred a larger more detailed map alone.
Despite such failings, this is an extremely useful guide to the layout of Roman Britain which should interest anyone who has even a minor fascination with the period.