[colorado tanker]

Here is a large scale map of the area they are investigating:

This line was to run along the hills south of the Highlands Massif, which would place all the Lowlands, including Fife, under Roman rule. It makes sense if you want all the best land for Rome, but it would make for a much less defensible line than the Antonine.

[SunkenCiv]

Thanks colorado tanker.