- 期刊
結合地面與無人空中載具光達推估大葉桃花心木人工林林分材積
Integrating Terrestrial and Airborne Laser Scanning to Estimate Stand Volume of Swietenia macrophylla King Plantations
摘要
本研究區域位於雲林縣古坑鄉大葉桃花心木（Swietenia macrophylla King）之平地人工林，以地面及無人空中載具光達（以下簡稱空載光達）推估林分性態值並評估其使用效率與準確度，並建立此樹種之樹高曲線式及地方材積式，最後藉由空載光達建立空中材積式推估蓄積量。研究結果顯示，點雲結合後可彌補地面光達對於獲取樹高及空載光達獲取胸徑及立木位置的不足，結合點雲後獲取資料的效率也有所提升，亦可透過結合點雲建立樹高曲線式及地方材積式。單獨使用空載光達也可建立空中材積式。因應不同調查目的及樣區現況選擇合適之光達系統，結合地面及空載光達點雲可有效提高調查林分性態值之效率及準確性。
並列摘要
The study area is located in the flat artificial forest of Swietenia macrophylla King in Guken Township, Yunlin County. TLS and ALS were used to estimate the stand structure and evaluate their efficiency and accuracy. Height-diameter equations and local volume equations for this tree species were established, and the ALS was used to estimate the volume. The results showed that the point cloud can compensate for the limitations of TLS in obtaining tree height and ALS in obtaining diameter at breast height and tree position. The efficiency of data acquisition was also improved by combining the point cloud, and height-diameter equations and local volume equations were established using the point cloud. Using ALS alone can also establish the airborne volume equation. Choosing the appropriate LiDAR system according to different survey purposes and site conditions, and combining TLS and ALS point clouds can effectively improve the efficiency and accuracy of surveying stand structure.