Coordinate X: Y: Search Zoom In Zoom Out

18 13 18 14 18 15 18 16 18 17 18 18 18 19 18 20 18 21 18 22 18 23 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid