[?] Question about "large" maps.

[k30dxedle]

Ok, I didn't UTFSE, I'll admit it: I didn't know what in the world to search for.

Anyway, on to my actual post. If, hypothetically, someone had way too much time on their hands, would it be possible to shrink everything (including terrain) down to, say, 1/50 size, but keep the map as perhaps 4km x2? And if so, how would it look? Would there be any problems (like the minimap)?

Yes, I realize you'd need a 65536x65536 or something terrain texture.