就算沒有板塊運動，玉山的高度還是會變動
為什麼？因為測量技術不同
現在又創「新高」(精度提高)啦～
土地測量局於民國92年以直接水準完成玉山正高測量工作，推算玉山正高高程3951.798m。
該作業中尚辦理各點位重力測量及部分點位間之GPS與三角高程測量，提供成果檢核比對與學術分析。
任務完成後，國立交通大學黃金維教授對觀測資料進行資料驗證與分析，並完成學術論文
「Determination of Northeast Asia's highest peak (Mt Jade) by direct levelling」
刊載於SURVEY REVIEW期刊，Vol.39,No.303 January 2007。
摘要如下：
Determination of North-East Asia’s highest peak (Mt Jade) by direct levelling.
Cheinway Hwang, Yu-Shen Hsiao, Chihchiang Lu, Wan-Shun Wu and Yao-Hsien Tseng
This paper demonstrates the results and problems in determining the height of Mt. Jade by direct levelling. Mt Jade is the highest peak in northeast Asia. GPS levelling and trigonometricl levelling were also made to validate the result of direct levelling. For GPS levelling a new geoid model is constructed using Taiwan’s latest gravity database and elevation model. The accuracy of the geoid model ranges from cm in coastal plains to dm in high mountains. Helmert deflections of the vertical derived from this geoid model improve the accuracy of trigonometric levelling. Gravity data at benchmarks were collected to compute orthometric corrections for the heights from direct levelling. The Poincaré-Prey reduction and the modified Mader reduction of mean gravity yield orthometric corrections that differ by up to dm near Mt. Jade. The Helmert orthometric height of Mt. Jade determined in this work is 3951.798 m, with a 72-mm commission error. The problem of using a rigorous orthometric height is discussed.
玉山高度雖被矮化，卻能「求真」
不然當初最高的時候，「可」高達3997m
加上于右任去世後，政府在主峰建立了3m高的雕像
硬是湊到4000m的整數高度，還讓于先生得以遙望大陸
唯銅像於1995、1996年2次破壞，才改立巨石寫上「新高」3952m
今天巨石還在，只是高度又改了。
