ESA, EURIMAGE / SCIENCE PHOTO LIBRARY ESA, EURIMAGE / SCIENCE PHOTO LIBRARY
Helsinki. Coloured radar satellite image of Helsinki (white, on coast), capital of Finland. North is towards the top. This image is a combination of three frames taken on different dates. Differences between frames show as areas of colour. Cultivated land (lower left, for example) appears red, blue or green, the different colours indicating growth of different crops between frames. Colours on the sea are due to differences in wave patterns. Most of the land is covered with conifer forest (brown-green). Helsinki lies on a peninsula surrounded by islands on the coast of the Gulf of Finland. Image produced by European Radar Satellite 1. Area approx.
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