Mate Drew came over for my birthday and brought a couple of game mats made out of 25mm foam both 1200mm X 1800mm.

They are three dimensional with raised road and sunken rivers and streams.

A ford across a stream.

Plowed field and sunken road.

Bridged river (supply your own bridge)

Shows the thickness of the two mats.

Drew also left a third unused mat of foam which I have started making some hills out of. More on these tomorrow.