The section you have showing on your map is part of the western map edge on Navezegane. The current implementation of the radiation zone, which wraps the entire map of Navezegane, is there to keep us from seeing the 7D2D "Far Lands" or map end while playing while still giving the illusion that there is a much larger game world beyond the edge of the radiation zone.some sort of measure preventing the player from reaching the end of the map
if you wanna test it to see how far you can get grab a hot bar full of medkits pop them all and see how far you get i also dont know but the hazmat suit may help tooAhh ok, interesting