This is a map of New Los Angeles (NLA) from Xenoblade Chronicles X. I created it by cropping and merging a bunch of screenshots of the gamepad screen at maximum zoom to get maps of each district, then combined them into a map of the full city.
When I merged the district maps, I discovered that the hex grids don't line up. Apparently the developers added the hex grid to each district separately and didn't worry about alignment at district boundaries. It doesn't affect gameplay since the game never shows the hexes of more than one district at once, but it's a little annoying for us mapmakers. Oh, well.
The Sports Complex in the Residential has tennis courts, which presumably are regulation size, so I used them to calculate the scale of the map. They're too small on the map for an accurate measurement, so I first used an aerial cam screenshot to make some more precise measurements and calculate the distance between the adjacent streets. I then measured the same distance on the city map and calculated the scale.
The scale came out to almost exactly 3200 pixels = 1 mile, so I added a square coordinate grid divided into tenths and fiftieths of a mile, measured from the center of the city. NLA's diameter at the outside walls is about 1.08 miles or 1900 yards.