The State of South Australia (population 1,554,700) has the Southern Ocean to the south and is flanked on the other sides by land. Its coastline, excluding islands, measures approximately 3,700 kilometres.South Australia is a land of generally low relief, the inland area being largely covered by featureless plains, or sand and gibber deserts. The South Australian capital, Adelaide, is the driest Australian capital city. Summer rainfall is light and unreliable; completely rainless months are not uncommon