How does 3S technology take selfies of the earth?

3S technology includes remote sensing technology, geographic information systems and global positioning systems.

Remote sensing technology’s “selfie” of the earth is mainly divided into red light, green light and infrared light to monitor the earth’s groundwater, vegetation growth conditions and mineral resources respectively.

The "selfie" of the earth by geographic information systems is mainly reflected in urban planning, including resource management, mapping and urban route planning.

The Global Positioning System’s “selfie” of the earth is reflected in the fact that it has real-time positioning and three-dimensional navigation on land, sea and air. It can be used in fields such as engineering surveying and aerial photography.