However, establishing the centre of an irregular shape is not a straightforward matter. Just where the centre of the State lies is open to dispute. According to Geoscience Australia a possible centre for New South Wales is just off Cockies Road, west-north-west of Tottenham, a small town west of Dubbo. This spot, () south of the Fiveways Intersection, is marked by a cairn constructed for Australia's Bicentennial celebrations in 1988.