Tokyo Bay, Japan
This image from Sentinel-1A's radar on 11 July 2014 shows Tokyo Bay in Japan.
Tokyo's centre lies mainly south of the Arakawa River. Other visible rivers on this image are the Edo River to its north and the Tama River just to its south, with all three streaming into Tokyo Bay. At the mouth of the Tama River we can see the runways of Haneda Airport.
Greater Tokyo is home to nearly 38 million people, making it the world's largest 'megacity' (a metropolitan area with more than 10 million people). Today, there are over 30 megacities across the globe.
Observations based on high-resolution satellite data provide essential information for city planning and for the sustainable development of urban regions. They can be used to monitor air pollution, water availability and extreme temperatures.
This image is featured on the Earth from Space video programme.
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Credit: European Space Agency (ESA)