As a statutory body for accurately measuring and authorizing the publication of Everest's elevation in China, the State Bureau of Geographic Information of Surveying and Mapping said that China has never given up its elevation of 8,844.43 meters above sea level.
"This data, authorized by the State Council, according to the" People's Republic of China Surveying and Mapping Law, "the program published as a unified national adoption of Mount Everest rock surface elevation elevation standard data has been used so far." National Mapping Geographic Information Bureau official said.
Everest is the highest peak in the world, located on the border between China and Nepal. Accurate determination of Mount Everest height is a symbol of mankind's exploration and understanding of the law of the earth's movement and is also a symbol of the national scientific and technological level and overall national strength. In 1975, the National Mapping Geographic Information Bureau, together with the military survey and climbers, conducted the first accurate measurement of the altitude of Mount Qomolangma and determined the elevation of Mount Everest to be 8848.13 meters.
In 2005, with the cooperation of the Tibet climbers, the National Mapping Geographic Information Bureau once again carried out the measurement of the elevation of Mount Everest. The accuracy of the elevation of the rock face at Mount Everest was 8844.43 meters and that of the peak snow and ice was 3.50 meters.
In 2005, the peak elevation data of Mount Everest peaked at 3.70 meters compared with the data measured in 1975. In this regard, the State Bureau of Surveying and Mapping, said the relevant person in charge of the main three reasons: First, in 2005 Everest elevation measurement using the global satellite positioning and other advanced mapping techniques, significantly improve the measurement accuracy; the first accurate determination of the peak The thickness of the top ice layer - the peak ice thickness of Mount Everest will change due to climate change, 8844.43 meters is the Everest peak rock surface elevation, excluding the peak ice thickness, that Everest's "net height" ; Thirdly, the change of Everest height caused by the crustal movement in the Everest region from 1975 to 2005.
After the accurate determination of the elevation of the rock surface of Mount Everest in 2005, the State Bureau of Geographic Surveying and Mapping, together with the original Gansu Bureau of Surveying and Mapping and the relevant departments of commerce, was authorized by the State Council and announced at home and abroad in October 2005, originally announced in 1975 Everest elevation data to stop using.
"2005 Everest rock surface elevation 8844.43 meters of accurate determination and publication, with strict scientific, strict statutory standards as a unified national data has been adopted so far, China and the world's mapping, geology, environment , Climate change and other important data on research, to reflect the country's overall national strength and surveying and mapping science and technology, to promote earth science research is of great significance. "National Mapping Geographic Information Bureau official said.
The official said that the State Bureau of Surveying and Mapping Geographic Information Bureau has maintained close monitoring and constant monitoring of Everest elevation changes. Before the State Council or the department authorized by the State Council promulgate new data on the altitude of Mount Everest, all units and individuals should use the 8848.43 meters elevation data of the rocky summit of Mount Everest promulgated according to law.