Uluru the Uluṟu-Kata Tjuṯa National Park. The local Anangu, the Pitjantjatjara people, call the landmark "Uluṟu" (). This word is a proper noun, with no further particular meaning in the Pitjantjatjara dialect, although it is used as a local family name by the senior Traditional Owners of Uluru. On 19 July 1873, the surveyor William Gosse sighted the landmark and named it Ayers Rock in honour of the then Chief Secretary of South Australia, Sir Henry Ayers. Since then, both names have been used. In 1993, a dual naming policy was adopted that allowed official names that consist of both the
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