This Proba image features the sister cities of Sault Sainte Marie, Ontario, and Sault Sainte Marie, Michigan. The Sault Sainte Marie International Bridge spans 4,5 km and is visible in the image as a thin white strip, connecting Ontario and Michigan. ESA’s Proba satellite acquired this image on 11 August 2006 with its Compact High Resolution Imaging Spectrometer (CHRIS), designed to acquire hyperspectral images with a spatial resolution of 18 metres across an area of 14 kilometres.