Robert Hugh Layton extend their maker's or user's agency. While studying Australian rock art Robert Layton helped prepare a number of Aboriginal Land Claims, of which the first was the claim to the Uluru National Park. This research has been published in his books "Uluru: An Aboriginal history of Ayers Rock" (Aboriginal Studies Press, Canberra, 1986 reissued 2001) and Australian rock art, a new synthesis (Cambridge University Press 1992). He has revisited Australia several times, working on the Hodgson Downs land claim in 1993-4 and helping to prepare the Australian Government's submission to UNESCO to place the Uluru National Park on the World
Local attraction Iron ores or magnetic rocks while as artificial sources consist of steel structures, iron pipes, current carrying conductors. The iron made surveying instruments such as metric chains, ranging rods and arrows should also be kept at a safe distance apart from compass. Local attraction at a place can be detected by observing bearings from both ends of the line in the area. If fore bearing and back bearing of a line differ exactly by 180°, there is no local attraction at either station. But if this difference is not equal to 180°, then local attraction exists there either at one