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The GDA94 datum was formalized in 1994, replacing the previous datums which were being used in Australia at the time, the Australian Geodetic Datum 1966 (AGD66) and the Australian Geodetic Datum 1984 (AGD84). Prior to 1966, maps in Australia were produced in miles using the Australian National Grid. [2]
Each of the 60 zones uses a transverse Mercator projection that can map a region of large north-south extent with low distortion. By using narrow zones of 6° of longitude (up to 668 km) in width, and reducing the scale factor along the central meridian to 0.9996 (a reduction of 1:2500), the amount of distortion is held below 1 part in 1,000 ...
Climate map of Australia. By far the largest part of Australia is arid or semi-arid. A total of 18% of Australia's mainland consists of named deserts, [20] while additional areas are considered to have a desert climate based on low rainfall and high temperature. Only the south-east and south-west corners have a temperate climate and moderately ...
A density-equalising map of organic agriculture in Australia based on certified organic hectares. Australia accounts for more than half of the world's certified organic hectares. [62] As of 2021, $2.3 billion worth of commodities were produced in Australia by the organic agriculture sector, representing approximately 3% of agricultural output. [63]
Australia, officially the Commonwealth of Australia, [17] is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. [18] Australia has a total area of 7,688,287 km 2 (2,968,464 sq mi), making it the sixth-largest country in the world and the largest country by area in Oceania .
It runs roughly parallel to the east coast of Australia and forms the fifth-longest land-based mountain chain in the world, and the longest entirely within a single country. It is mainland Australia's most substantial topographic feature and serves as the definitive watershed for the river systems in eastern Australia, hence the name.
During the usual periods of DST, the three standard time zones in Australia become five zones. This includes the areas that do not observe DST: Western Australia (UTC+08:00), the Northern Territory (UTC+09:30), and Queensland (UTC+10:00). The change to and from DST takes place at 02:00 local standard time the appropriate Sunday.
The world's smallest continent, Australia is also the sixth-largest country by land area and sometimes considered the world's largest island. Australia has a mainland coastline of 32,994 kilometres (20,502 mi) [14] and claims an exclusive economic zone of about 8,200,000 square kilometres (3,200,000 sq mi). [15]