@Hfar They had to use rivers because GPS coordinates were still only theoretical, the problem of how to determine longitude was solved after some of the eastern states borders were determined. Hence why western states use latitude and longitude borders and eastern states don't.
0
@Hfar They had to use rivers because GPS coordinates were still only theoretical, the problem of how to determine longitude was solved after some of the eastern states borders were determined. Hence why western states use latitude and longitude borders and eastern states don't.