Sydney is the capital of New South Wales and the most populous city in Australia and Oceania. It is located on Australia's east coast. The metropolis surrounds the world's largest natural harbour and sprawls about 70km on its periphery towards the Blue Mountains, with Hawkesbury located on the north and Macarthur on the south. Sydney is made up of 658 suburbs, 40 local government areas and 15 contiguous regions. Residents of the city are known as "Sydneysiders". On June 2016 Census, Sydney's estimated population was 5,029,768.
Sydney has been inhabited by indigenous Australians for about 30,000 years. Lieutenant James Cook first landed at Kurnell in 1770, when navigating his way up the east coast of Australia on his ship, HMS Endeavour. It was not until 1788, when the First Fleet, which consisted of convicts and was led by Captain Arthur Phillip, arrived in Botany Bay to found Sydney as a penal colony, the first European settlement in Australia. Phillip named the city "Sydney" in recognition of Thomas Townshend, former Viscount Sydney's Home Secretary in 1788. There are examples of rock art and engravings located in the protected Ku-ring-gai Chase National Park, as well as the Royal National Park.
Since convict transportation ended in the mid-19th century, the city has transformed from a colonial outpost into a major global cultural and economic centre. The municipal council of Sydney was incorporated in 1842 and became Australia's first city. Gold was discovered in the colony in 1851 and with it came thousands of people seeking to make money. Sydney became one of the most multicultural cities in the world after the mass migration following the Second World War. According to the 2011 Census, more than 250 different languages were spoken in Sydney and about 40 percent of residents spoke a language other than English at home. Furthermore, 36 percent of the population reported having been born overseas. Despite being one of the most expensive cities in the world, the 2014 Mercer Quality of Living Survey ranks Sydney 10th in the world in terms of quality of living, making it one of the most livable cities. It is classified as an Alpha World City by Globalization and World Cities Research Network, indicating its influence in the region and throughout the world. Ranked eleventh in the world for economic opportunity, Sydney has an advanced market economy with strengths in finance, manufacturing and tourism. There is a significant concentration of foreign banks and multinational corporations in Sydney and the city is promoted as one of Asia Pacific's leading financial hubs. Established in 1850, the University of Sydney is Australia's first university and is regarded as one of the world's leading universities.
In addition to hosting events such as the 2000 Summer Olympics, Sydney is amongst the top fifteen most-visited cities in the world, with millions of tourists coming each year to see the city's landmarks. Its natural features include Sydney Harbour, the Royal National Park, and the Royal Botanic Garden. Man-made attractions such as Sydney Tower, the Sydney Harbour Bridge, and the Sydney Opera House (which became a World Heritage Site in 2007), are also well known to international visitors. The main passenger airport serving the metropolitan area is Kingsford-Smith Airport, one of the world's oldest continually operating airports. Opened in 1906, Central station is the main hub of the city's rail network.
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Today our satellite comparison shows Sydney. Sydney is the oldest and largest Australian city. The city and suburbs cover about 12,400 sq km and Sydney faces serious pollution problems resulting from the intensity of development, habitation, and traffic. The suburbs especially on the great western expanse, are undistinguished. Due to a rise in housing costs, many of the inhabitants have been inclined to live in the outskirts of the city. Long fingers of bushland extend deep into Sydney's metropolitan heart and the consequent vulnerability to bushfires was tragically underlined in January 1994 when fires sweeping through New South Wales engulfed many suburban homes and then the city centre.
The images acquired by Landsat-7 (TM) and Landsat-8 (OLI) reveal how Sydney has developed over the past 8 years. According to the image comparison, the area of Botany Bay, near the Kingsford Smith Airport had major development of the commercial port site. Other areas such as the suburbs on the West and the North of the Botany Bay have also been changed significantly.
Another aim of these images is to promote the opportunity to download Landsat data through the ESA and third party mission portals , where images captured every day are made available to the users and the scientific community.
Landsat full resolution data products are freely available for immediate download at:
View high resolution image (Before) (JPG 4.7 MB)
View high resolution image (After) (JPG 3.6 MB)
In this image acquired by Sentinel-2, and processed with a combination in visible colour (bands 4,3,2), we aim to show this new field of application that the Copernicus satellite family can cover.
View large format image (JPG 8.3 MB)