GPS positioning measurement water terrain Zhang Weiji photo installation of multi beam probe Zhang Weiji photo gauge zero connecting measure Zhang Weiji photo debugging 3D scanner Zhang Weiji photo Lhasa, China Economic Net News (reporter correspondent Li Shugui Zhang Weiji) recently, in the West Lake in Tibet when provoked Yong erroneous measurements, Committee on the Yangtze River Hydrological Bureau was used successfully multi beam sounding system and 3D scanner to realize synchronous scanning, measuring, which is plateau lake in China.