‘The Optimist,’ Kalahari Desert, Namibia
January 29, 2015
| Credit | Image provided by the U.S. Geological Survey (USGS) EROS Data Center Satellite Systems Branch. Caption adapted from text provided by NASA's Earth Observatory. Source: NASA/USGS Landsat 7; NASA Earth Observatory. |
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On the edge of the Kalahari Desert in Namibia, sand dunes are encroaching onto once-fertile lands in the north. Healthy vegetation appears red in this image; in the center, notice the lone red dot. It is the result of a center-pivot irrigation system, evidence that at least one optimistic farmer continues to work the fields despite the approaching sand.
This image was acquired by the Landsat 7 satellite on August 14, 2000. This is a false-color composite image made using near infrared, red and green wavelengths. The image has also been sharpened using the sensor’s panchromatic band.
