空載雷射掃瞄測高資料區域平差模式之建立與可行性之研究

A Study on the Establishment of Block Adjustment Model and Feasible Investigation for Airborne Laser Altimeter Data

尤瑞哲(R.J.You) ； 蔡欣怡(S.Y.Tsay)

《航測及遙測學刊》 10卷1期 (2005/03) Pp. 15-25

https://doi.org/10.6574/JPRS.2005.10(1).2

摘要

空載雷射掃瞄技術以GPS的定位和INS的姿態決定可直接推導得地面雷射點的高程。理論上，不需要其他輔助方法。目前所有的雷射掃瞄系統皆採用此種方法求得地面點的高程。本論文則輔以掃瞄帶重疊的幾何特性提出一個平差模式，研究由高程資料進行區域平差計算之可行性，藉以提高空載雷射掃瞄的精度。本文所提的方法適用於高程的一階導數連續之資料。研究結果顯示，在綠色植被地區，應用本法可以得到約20cm的高程精度。

關鍵字

空載雷射掃瞄 ； 區域平差

並列摘要

The airborne laser scanning technique with GPS positioning and INS orientation is useful for height determination of ground points. In principle, no other auxiliary data are needed, and the coordinates of topographic points can be derived directly from the computational results of GPS and INS data. All current developed airborne laser scanning systems apply the method for the height determination. In the paper, we present a block adjustment model for sufficiently utilizing the overlaps between the scanning strips and study the feasibility of the model in order to improve the accuracy of the height determination by airborne laser scanning technique. Our method is applicable for height data which have a continuous first order derivative. The results show that the accuracy at ±20cm level is achievable.

並列關鍵字

airborne laser scanning ； block adjustment