为解开珠峰的身高之谜，2005珠峰复测中我国采用了先进和完善的测量方案，在此基础上所测的结果具有更高的精确度。2005，站在世界之巅，中国测绘向全世界证明其不凡的实力。

如何测出珠峰高程

　　本次测量珠峰高程是采用了双模型的测量方法。

　　第一种方法是传统的经典测量方法，就是以三角高程测量方法为基础，配合水准测量、三角测量、导线测量等方式，获得的数据进行重力、大气等多方面改正计算，最终得到珠峰高程的有效数据。

　　主要分三步走：

　　第一步，先在珠峰脚下选定较容易的、能够架设水准仪器的测量点，先把这些点的精确高程确定下来。用水准测量、高程导线测量等方法逐级确定，得到珠峰脚下测量点的高程。在过去的几十年中，经过我国几代测量人员的不懈努力，已经取得西藏拉孜县相对青岛水准原点的精确高度，测量队员从拉孜开始，徒步向珠峰测量，路程约500公里，测量站超过10000个。

　　第二步，在珠峰峰顶架起觇标，运用三角几何学中“勾股定理”的基本原理，推算出珠峰峰顶相对于这些水准点的高程差。

　　第三步，获得的高程数据再进行重力、大气等多方面的改正计算，最终确定珠峰高程测量的有效数据。我国1975年测定珠峰高程的时候采用的就是这种方法。

　　第二种方法是GPS卫星大地测量法，此次是我国首次使用这种全球卫星定位方法来测量珠峰的椭球高。本次珠峰测量首次把GPS接收机带到峰顶，和山下进行同步观测求得椭球高，并为全球重力场研究、地球形变等提供地球第三极的几何方法。

如何进行测量行动

　　由于此次测量珠峰的工作量很大，由国家测绘局组建的中国珠峰测量队的40多名队员被分成了GPS综合测量分队、水准测量分队、重力测量分队及登山冲顶分队等4个分队，同时展开各自的测量工作。按照测量计划，整个测量过程大约分为五个阶段：

　　第一阶段，从3月17日到4月17日，进行珠峰外围地区的测量工作。GPS综合测量分队在青藏高原广大地区的30个主测量点和40多个附测量点展开6轮联机观测行动，这些测量点大都分布在藏北无人区和昆仑、唐古拉、喜马拉雅、冈底斯等藏区大山中，都是被精心选择的青藏高原板块典型的地理标点，联机观测的数据结果将反映青藏高原地壳变化进程的细节；此次珠峰高程测量分队从已经取得相对青岛水准原点精确高度的西藏拉孜县起测，逐步向珠峰推进；重力测量分队从拉萨开始向珠峰边测量边推进；登山冲顶分队在珠峰大本营随西藏登山队开始适应性训练。

　　第二阶段，从4月22日到5月8日，在珠峰周边地区进行测量。GPS综合测量分队布测珠峰GPS测量控制网，包括29个测量点，进行6轮联机同步观测；水准测量分队分别通过四条路线向珠峰推近，选定珠峰下的交会测量点；重力测量分队进驻珠峰地区展开测量。

　　第三阶段，5月22日11时08 分，珠峰登顶测量突击队成功登顶珠穆朗玛峰，在峰顶竖立觇标，各组进行珠峰峰顶交会测量。

　　第四阶段，5月至6月下旬，进行数据整理、分析和计算，并汇总数据。

　　第五阶段，8月，获得珠峰高程最终数据，报国务院批准。
 

To unlock the mystery of Everest's height, measurement of Mount Qomolangma in 2005, China has adopted an advanced and comprehensive measurement program, on this basis, the results measured with higher accuracy. 2005, standing on top of the world, China Surveying and Mapping to the whole world to prove their extraordinary strength.

How do I measure the height of Mount Everest

The measurement of height of Mount Qomolangma is the adoption of dual-mode measurement method.

The first method is the traditional classical measurement method, is to trigonometric leveling method, based on with the leveling, triangulation, traversing, etc., the data obtained gravity, atmospheric correction and many other terms, end up Mount Everest height The valid data.

Mainly consists of three steps:

A first step, first the foot of Mount Everest selected easier to set up the standard of the instrument measuring points, first the exact height of these points finalized. With the standard of measurement, height measurement methods such as wire progressively determined to be the height measurement points at the foot of Mount Qomolangma. In the past few decades, through our unremitting efforts of several generations of surveyors, has been made in Tibet Lazi County, the precise origin of the relatively high level of Qingdao, measuring crews from Lazi started on foot to the Everest measurement, distance about 500 km, measuring stations more than 10,000.

The second step, put up a surveyor's beacon in the Everest peak, the use of triangular geometry, the "Pythagorean theorem" basic principle, calculate the Everest peak points relative to these standard height difference.

The third step is to obtain the elevation data to conduct gravity, atmospheric correction and many other calculations to determine the final height measurement of Mount Qomolangma valid data. Determination of Height of Mount Qomolangma in China in 1975, when this method is used.

The second method is GPS satellite geodesy method, this is China's first global satellite positioning using this method to measure the Everest ellipsoid high. The measurement of Mount Everest the first time GPS receiver into the peak, and the foot of the mountain to seek to conduct simultaneous observation ellipsoid is high and the global gravitational field studies, such as the Earth's deformation to provide the third pole of the Earth's geometric method.

How to measure action

The measurement of Mount Qomolangma as the heavy workload, set up by the State Bureau of Surveying and Mapping, China Mount Everest more than 40 members of the survey team was divided into a comprehensive measurement of GPS units, leveling unit, gravity measurement unit and the mountain-hoisting squads 4 units at the same time expand their survey work. Accordance with the measurement program, the entire measurement process is divided into roughly five stages:

The first phase, from March 17 to April 17 to conduct a survey on the outlying areas of Mount Qomolangma. GPS unit in the Qinghai-Tibet Plateau Comprehensive Survey of 30 large areas of the main measuring points and more than 40 measuring points attached to on-line observation campaign started six of these measurement points are distributed mainly in the no man's land of northern Tibet and Kunlun, Don Regula, Himalayan, Gang at the end of Sri Lanka and other Tibetan mountain, all of the Qinghai-Tibet Plateau have been carefully selected plates typical geographical punctuation, online observation data results will reflect the change process, the details of the Tibetan Plateau crust; The height measurement of Mount Qomolangma detachment has been achieved from the relative level of Qingdao a high degree of precision the origin of Tibet from Lazi County, measurement, and gradually advance to the Mount Everest; gravity measurements started detachments from Lhasa to Mount Everest RDM edge propulsion; climbing hoisting unit climbers at Everest base camp in Tibet began with the adaptability training.

The second stage, from April 22 to May 8, at Mount Qomolangma surrounding areas measured. GPS Integrated Measurement unit cloth measuring Everest GPS survey control network, including 29 measuring points, to six on-line simultaneous observation; standard measurement units were pushed through the four routes to the Everest near the intersection of the selected measurement points under Mount Everest; Gravity Survey started measuring unit stationed in the region of Mount Qomolangma.

The third stage, at 11:08 on May 22, the successful ascent of Mount Qomolangma ascent of Mount Everest measurement commandos, in the surveyor's beacon erected peak, the group intersection of Mount Everest peak measurements.

The fourth phase, in late May to June, data collation, analysis and calculation, and summary data.

The fifth stage in August, to obtain the final data Height of Mount Qomolangma, the State Council for approval.