GPS pattern recognition exercise by the Chinese military?
From Mail Online (11/15/2011):
A Google Maps satellite has spotted a series of bizarre structures during a sweep of the Gobi desert in China.
The internet is buzzing with theories about what their purpose is, with suggestions ranging from giant QR readers to practise targets for military satellites.
To add to the intrigue, they are located on the borders of Gansu province and Xinjiang in northwestern China - an area that the superpower uses to build military, space and nuclear equipment.
[Click the photos to enlarge.]
(More pictures at the Mail Online article.)