光達數值地形於野外地質調查之應用：以獻肚山崩塌區及谷關-德基區域為例

Application of LiDAR DEM for Field Geological Investigation: Take Xian-Du Landslide Area and Guguan － Deji Area for Example

徐乙君(Yi-Chun Hsu) ； 張中白(Chung-Pai Chang)

《航測及遙測學刊》 20卷3期 (2016/05) Pp. 183-199

https://doi.org/10.6574/JPRS.2016.20(3).3

摘要

以空載光達測距掃描技術獲取之高精度數值地形資料，有助於線形構造判釋，可做為野外調查之基礎，本研究以獻肚山崩塌區及中橫公路的谷關-德基地區為例。藉由高解析度數值地形判斷獻肚山崩塌區域有一系列的東北東-西南西向構造，在谷關-德基區域可觀察到近南北向及東北-西南向之構造，但無法判別其屬於何種構造，惟有經過野外勘查才能確定，野外調查尚可確認構造的活動特性、延續性及與其他構造之相互關係。高解析度數值地形判釋線形構造，可用於野外工作規劃，惟應用於區域構造解釋時必須謹慎，與實地查核作交互比對，避免過度解釋。

關鍵字

光達數值地形 ； 線形構造 ； 野外調查

並列摘要

Using the airbone LiDAR high-resolution DEM data to identify lineament structure provides an opportunity to generate more comprehensive structural maps. In this study, we use Mt. Xian-Du Landslide area (Hsiaolin Village) in Kaohsiung city and Guguan-Deji area in Central Cross-Island Highway as example to demonstrate how we applied the LiDAR DEM for field investigation. With the use of high-resolution DEM we identified a series of east-northeast to west-southwest trending structures in Mt. Xian-Du Landslide area. During field investigation we recognized characteristics of these structures, they are generally the strike-slip faults, and track its continuity, as well as other structural relationships. In the high- resolution DEM using of Guguan-Deji area, we observed the north-south and northeast-southwest trending structures. However, the structures in this area are complex in nature, and we cannot recognize the nature of structures directly by DEM. Using the high-resolution DEM can enhance the utility of remote sensing for structural mapping since these data sets enable the extraction of detailed information about both local and regional geological structures. However, field checking is always necessary before the structure.

並列關鍵字

LiDAR DEM ； lineament structure ； field investigation