Difference:
1. GNSS (Global Navigation Satellite System) encompasses all global satellite navigation systems, including GPS, as well as other satellite systems like GLONASS (Russia), Galileo (EU), BeiDou (China), and Qzss(Japan).
2. GPS (Global Positioning System) is a specific satellite navigation system developed and maintained by the United States.
What is the navigation system in China?
The Chinese GNSS is known as the BeiDou Navigation Satellite System (BDS). Phase 2 of the BeiDou system (BDS-2) officially became operational in December 2012, providing coverage for the Asia Pacific region.
Is BeiDou as good as GPS?
Regarding precision, BeiDou provides greater accuracy (less than 1 meter) when compared to GPS (less than 4.9 meters). Of course, their precision differs depending on direction; horizontally so-so but vertically not as much precision-wise for BeiDou when measured against GPS.
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