Measuring Fallout 4 map size, by walking across the entire thing

How does Fallout 4 stack up against the rest of the open-world games when measured from one end of the map to the other? YouTube channel 8-BIT BASTARD wanted to measure the landmass of Fallout 4 and how it stacks up against other open-world games such as Skyrim, Just Cause 2, The Witcher 3, GTA