<Table> Great Barrier Reef <Tr> <Th_colspan="2"> UNESCO World Heritage site </Th> </Tr> <Tr> <Td_colspan="2"> Satellite image of part of the Great Barrier Reef adjacent to the Queensland coastal areas of Airlie Beach and Mackay . </Td> </Tr> <Tr> <Th> Location </Th> <Td> Off the east coast of the Queensland mainland, Australia </Td> </Tr> <Tr> <Th> Criteria </Th> <Td> Natural: vii, viii, ix, x </Td> </Tr> <Tr> <Th> Reference </Th> <Td> 154 </Td> </Tr> <Tr> <Th> Inscription </Th> <Td> 1981 (5th Session) </Td> </Tr> <Tr> <Th> Area </Th> <Td> 34,870,000 ha </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.gbrmpa.gov.au </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 18 ° 17 ′ 10" S 147 ° 42 ′ 00" E ﻿ / ﻿ 18.28611 ° S 147.70000 ° E ﻿ / - 18.28611; 147.70000 Coordinates: 18 ° 17 ′ 10" S 147 ° 42 ′ 00" E ﻿ / ﻿ 18.28611 ° S 147.70000 ° E ﻿ / - 18.28611; 147.70000 </Td> </Tr> <Tr> <Td_colspan="2"> Center of the Great Barrier Reef Great Barrier Reef (Australia) Show map of Queensland Show map of Australia Show all </Td> </Tr> </Table> <Tr> <Th_colspan="2"> UNESCO World Heritage site </Th> </Tr>

What does the great barrier reef mean to australia