This multi-temporal SAR colour composite image highlights Barcelona, appearing as a large, bright white area on the left-centre of the image. The city's historic section, built around the harbour, is bisected by the Rambla, a prominent thoroughfare stretching from the harbour to Plaza de Cataluña, the city's central hub. The composite is constructed from three ASAR images taken on different dates. Each date is represented by a different colour in RGB format: blue and green from 2003, and red from 2004.

• Image 1: Satellite: Envisat, Instrument: Advanced Synthetic Aperture Radar (ASAR), Acquisition Date: Blue: 19 June 2003, Green: 17 October 2003, Red: 19 February 2004, Swath Width: 100 km