Ok, here's some sort of "review" for this map :
[+] It's kinda good representer of American continet from far time away.
[+] Kinda good use of Raise tool
[+] Nice water
[-] Size is too small. This size of map is only suitable for some hero arenas or one-lane AoS (but maybe that's what you making - but suggesting by title, it's not)
[-] Undetailed - good terrains needs good details.
[-] Weird placed trees, random objects without purpose and without any road (no matther what age was, I suppose that there were some roads at least) ...
I give 2/5, but this terrain needs some work
GL in future =)