Since antiquity, workers have harvested salt from the tidal marshes of Aigues-Mortes, France—a coastal Mediterranean town steeped in history. Today, salt remains an important industry here, and satellites can provide a bird's eye view of the vibrant production process.
The Operational Land Imager (OLI) on Landsat 8 acquired this natural-color image on August 20, 2018, around the time of peak harvest. Salt from nearby marshes is mechanically harvested for industrial, chemical, and pharmaceutical uses. Salt marshes at Aigues-Mortes also produce a culinary delicacy—a fragile, flaky crystal harvested by hand.
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Credit: NASA Earth Observatory images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey.