用无人机测绘40℃的长沙

长沙的街边，一架无人机正慢慢起飞，开始它的地理测绘工作。

A UAV is slowly taking off to start its geographical mapping work on a street in Changsha.

测绘作业具有很强的时效性，无论严寒酷暑测绘工程师都会确保测绘工作正常开展。

Because of strong timeliness, no matter whether it is cold or hot, engineers should ensure that the surveying &mapping operation is carried out normally.