Each baseboard is 720 meters by 720 meters. Each "yellow" square is 10 meters by 10 meters. Those are subdivided by darker lines twice in 5 meter increments. Those are real scale values. The HO Scale, and N Scale, O Scale modes would display those real scale values in their respective scales 1/87, 1/160 and 1/48 (U.S. scales, some regions differ).
Oh, each baseboard is 0.72 KM square, each yellow square is 0.010 KM and the darker lines, 0.005 KM (Real Scale).