costs of transferring a poor young labouring population to South Australia. In early 1838 the colonists became concerned after it was reported that convicts who had escaped from the eastern states may make their way to South Australia. The South Australia Police was formed in April 1838 to protect the community and enforce government regulations. Their principal role was to run the first temporary gaol, a two-room hut. The current flag of South Australia was adopted on 13 January 1904, and is a British blue ensign defaced with the state badge. The badge is described as a piping shrike with wings outstretched on a yellow disc. The state badge is believed to have been designed by Robert Craig of Adelaide's School of Design. Geography The terrain consists largely of arid and semi-arid rangelands, with several low mountain ranges. The most important (but not tallest) is the Mount Lofty-Flinders Ranges system, which extends north about from Cape Jervis to the northern end of Lake Torrens. The highest point in the state is not in those ranges; Ngarutjaranya () is in the Musgrave Ranges in the extreme northwest of the state. The south-western portion of the state consists of the sparsely inhabited Nullarbor Plain, fronted by the cliffs of the Great Australian Bight. Features of the coast include Spencer Gulf and the Eyre and Yorke Peninsulas that surround it. The Temperate Grassland of South Australia is situated to the east of Gulf St Vincent. The principal industries and exports of South Australia are wheat, wine and wool. More than half of Australia's wines are produced in the South Australian wine regions which principally include Barossa Valley, Clare Valley, McLaren Vale, Coonawarra, the Riverland and the Adelaide Hills. See South Australian wine. South Australian boundaries South Australia has boundaries with every other Australian mainland state and territory except the Australian Capital Territory and the Jervis Bay Territory. The Western Australia border has a history involving the South Australian government astronomer, G.F. Dodwell, and the Western Australian Government Astronomer, H.B. Curlewis, marking the border on the ground in the 1920s. In 1863, that part of New South Wales to the north of South Australia was annexed to South Australia, by letters patent, as the "Northern Territory of South Australia", which became shortened to the Northern Territory on 6 July 1863. The Northern Territory was handed to the federal government in 1911 and became a