Astronaut photo of the <a href="https://en.wikipedia.org/wiki/Al_Khufrah_Oasis" class="extiw" title="w:Al Khufrah Oasis">w:Al Khufrah Oasis</a> in Libya. The circular objects are agricultural fields. The shape is characteristic of <a href="https://en.wikipedia.org/wiki/center_pivot_irrigation" class="extiw" title="w:center pivot irrigation">w:center pivot irrigation</a>. These fields are approximately 0.6 mile (1 kilometer) in diameter. Darker colors indicate fields where such crops as wheat and alfalfa are grown. Lighter colors can indicate a variety of agricultural processes: fields that have been harvested recently; fields that are lying fallow; fields that have just been planted; or fields that have been taken out of production.
ISS Crew Earth Observations experiment and the Image Science &amp; Analysis Group, Johnson Space Center.
2004-10-28
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