There are two main methods of measuring Mount Everest: geodetic and satellite.
Geodesy: Techniques such as triangulation and leveling are used to measure the height of mountain peaks. First of all, it is necessary to establish a certain number of measurement points on the ground, measure the distance and vertical angle between these points and the peak target, and use the Pythagorean theorem and trigonometric function to calculate the elevation difference of the peak relative to these points. Then, the data were corrected and calculated in terms of gravity and atmosphere, and the effective data was finally determined. This method requires the establishment of measurement points in the mountains, which is a large workload, time-consuming, and greatly affected by meteorological and other factors.
Satellite surveying: The use of satellite technology to measure the height of mountain peaks, including radar elevation measurement and satellite laser elevation measurement. This method can directly measure the altitude of the mountain peak, without the need to establish a measurement point on the ground, and has the advantages of high accuracy, fast speed, and little influence by meteorology. In recent years, the development of satellite measurement technology, especially the application of laser elevation measurement technology, has made it possible to measure the altitude of Mount Everest more accurately.
During the measurement process, a combination of the above two methods may be used to improve the measurement accuracy. The above information is for reference only, for more information, please consult professional books or consult a professional.