Joey, actually the blue line on the National Geographic map doesn't depict a river whatsoever, it's an arbitrary color for a state border. Because the river a

Joey, actually the blue line on the National Geographic map doesn't depict a river whatsoever, it's an arbitrary color for a state border. Because the river actually IS the defining border for the state, on the Imus map the river is highlighted in blue underneath the dark-green that depicts a state border. A much better design decision IMO.