Looks like the mystery may be solved, the strange lines and grids found in Google Earth images of China are for aligning and calibrating spy satellites according to Foxnews.
Theories and conspiracies flooded the web when the strange Google Earth images were found. But the truth seems far simpler.
“The grids of zigzagging white lines seen in two of the images — the strangest of the various desert structures — are spy satellite calibration targets. Satellite cameras focus on the grids, which measure approximately 0.65 miles wide by 1.15 miles long, and use them to orient themselves in space.” Says Jonathon Hill, a research technician and mission planner at the Mars Space Flight Facility at Arizona State University.
The US has done the same thing according to Hill, “An example I found just now is a calibration target for the Corona spy satellites, built back in the 1960s, down in Casa Grande, Ariz., [at coordinates] 32° 48′ 24.74″ N, 111° 43′ 21.30″ W,” Hill told Life’s Little Mysteries.” The target in this case is a concrete white cross shown below:
And for the material that was used to make these structures?
Most likely Paint.
Hill goes on to explain the remaining structures and what he thinks they are. All sound very logical.
It is hard to decipher images when viewed as 2-D from space. I have looked at several locations where I have grown up in Google Earth and everything looks different, and I could not even find some large sized landmarks, they just did not show up.