Uluru Line. In separate expeditions, Ernest Giles and William Gosse were the first European explorers to this area. While exploring the area in 1872, Giles sighted Kata Tjuta from a location near Kings Canyon and called it Mount Olga, while the following year Gosse observed Uluru and named it Ayers Rock, in honour of the Chief Secretary of South Australia, Sir Henry Ayers. Further explorations followed with the aim of establishing the possibilities of the area for pastoralism. In the late 19th century, pastoralists attempted to establish themselves in areas adjoining the Southwestern/Petermann Reserve and interaction between Aṉangu and white people
Local attraction Local attraction While compass surveying, the magnetic needle is sometimes disturbed from its normal position under the influence of external attractive forces. Such a disturbing influence is called as local attraction. The external forces are produced by sources of local attraction which may be current carrying wire (magnetic materials) or metal objects. The term is also used to denote amount of deviation of the needle from its normal position. It mostly causes errors in observations while surveying and thus suitable methods are employed to neglect these errors. The sources of local attraction may be natural or artificial. Natural sources include