The city lies at NUMBER@1 metres -LRB- NUMBER@2 ft -RRB- AHD and consists of an area of approximately NUMBER@3 square kilometres -LRB- NUMBER@4 sq mi -RRB- , with the city occupying a built up area of approximately NUMBER@5 square kilometres -LRB- NUMBER@6 sq mi -RRB- .

The city area is NUMBER@3 square kilometres big and NUMBER@5 square kilometres are used by the city itself .
