Now, the elevation measurement of Mount Everest has realized the transformation from traditional geodetic technology to comprehensive modern geodetic technology. The professional surveying and mapping staff can make the measurement data more reliable and more convincing.
   In 1975, the Chinese mountaineering team reached the summit of Mount Everest. Although there were no professional surveyors at the time, the mountaineering team brought an important surveying instrument to the summit of Mount Everest. That is the target. This is also the first time in the history of human measurement that the target has been brought to the summit of Mount Everest. At that time, the surveyors selected 9 surveying sites from around Mount Everest, observing the horizontal and vertical angles of the target to determine the horizontal position of Mount Everest and the horizontal distance from each station to Mount Everest. According to the principle of triangular elevation measurement, the height of Mount Everest is calculated to be 8884.3 meters.
   In order to measure the numbers more accurately, the survey team will also carry instruments such as snow depth radar and gravimeter to the peak, and these instruments require professional surveying and mapping personnel to perform the survey and operation.
   It takes a while to measure gravity, and then let it be measured by hand, which is actually very difficult. The first is to sit there carefully, so it is not easy to carry it back on top of Mount Everest, and then it is even more difficult to carry out observation.