TOM VAN SANT, GEOSPHERE PROJECT / PLANETARY VISIONS / SCIENCE PHOTO LIBRARY TOM VAN SANT, GEOSPHERE PROJECT / PLANETARY VISIONS / SCIENCE PHOTO LIBRARY
Not for poster use.
Africa. Cloudless satellite image of Africa, the world's second-largest continent. North is at top. The colours of the land approximate to natural tones, whilst blue colour-codes represent ocean topography. North Africa largely consists of the Sahara desert. African rivers include the Nile (at upper right), Congo (at lower centre), and Niger (at centre left). This image was compiled from data acquired by NOAA weather satellites over eleven ten-day periods at an altitude of 833 kilometres to give a resolution of 1 kilometre.
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