台灣北部地區大地起伏加密模式之研究

Abstract

大地起伏值可以用來決定台灣地區之密合橢球體及新大地基準，對於全國 控制點之精度提昇關係重大，故大地起伏之決定是物理大地測量的主要目 標之一。因為大地起伏值加密方法甚多，本研究即針對雙線性法、複合二 次曲面法、 GPS座標轉換法三種數學模式進行加密研究，並與 GPS測得之 幾何高 h配合正高值 H所求得之實測大地起伏值作一比較分析，並評估此 三種大地起伏加密模式之優缺點。 Undulation can be used to determine the best fitting ellipsoid and new geodetic datum. It is also important for promotion the precision of the national control points. There are many methods for densifying undulations. In this study, Bilinear Method, Multiquartic Method, and Translation of GPS Adjustment Network are used. From the results, a comparsion between real surveying and methods of densification is executed. In addition, the advantages and drawbacks of the densifying methods are discussed.