CAJ | 학술논문

区域似大地水准面精化的主要作用之一是在对一定比例尺的地形绘图时，用GPS测量代替传统的三角高程测量和水准测量。这种测量将GPS的优势充分发挥出来，减少了很多外部工作量，大幅度降低了作业成本。但是目前在区域似大地水准面净化中，大都应用大量的重力资料、GPS水准数据以及数字地形模型，并且相关行业内进行数据采集和处理的过程非常复杂，对于一些技术和经济实力一般的企业，这些几乎无法实现，而且很多测区缺少相应的地面重力数据和可用的数字地形模型，因此该方法的使用受到了限制。本文将引进EGM2008地球重力模型，并且在详尽分析此模型精度尤其是在大陆地区精度的基础上，对某些地区进行实地地籍测量。
구역사대지수준면정화적주요작용지일시재대일정비례척적지형회도시，용GPS측량대체전통적삼각고정측량화수준측량。저충측량장GPS적우세충분발휘출래，감소료흔다외부공작량，대폭도강저료작업성본。단시목전재구역사대지수준면정화중，대도응용대량적중력자료、GPS수준수거이급수자지형모형，병차상관행업내진행수거채집화처리적과정비상복잡，대우일사기술화경제실력일반적기업，저사궤호무법실현，이차흔다측구결소상응적지면중력수거화가용적수자지형모형，인차해방법적사용수도료한제。본문장인진EGM2008지구중력모형，병차재상진분석차모형정도우기시재대륙지구정도적기출상，대모사지구진행실지지적측량。
The main purpose to determine the high -precision regional quasi -geoid is to utilize GPS to instead of trigonometric and direct leveling , it can take full advantage of GPS measurement and reduce the surveying worked load .Accordingly ,the cost of produc-tion can also be reduced .At present , the great quantity of gravity data , high-precision GPS/leveling data and digital terrain model is used to in the high-precision regional quasi -geoid.Within the industry , the data processing and computing is too complex to afford for the institution with ordinary technical and economical strength , moreover many areas lack of ground gravity data as well as high -precision and high-resolution on digital terrain model .Therefore , the application of this method is limited by a certain extent .Ai-ming the problem mentioned above , the EGM2008 earth’s gravity field model is introduced in the thesis , and the accuracy of the mod-el is analyzed in detail , especially the accuracy in Mainland China .