應用IDRISI遙測影像程式於地滑地變遷之研析

Application of IDRSI Remote Sensing Image Program to Landslide Changes

10.29417/JCSWC.201012_41(4).0004

劉家宏(Jia-Hong Liu)；馮正一(Zheng-Yi Feng)；楊明德(Ming-Der Yang)；黃志彰(Jih-Jang Huang)

IDRISI ； 遙測 ； 地滑 ； 植生指標 ； IDRISI ； remote sensing ； landslide ； vegetation index

中華水土保持學報

41卷4期（2010 / 12 / 01）

319 - 332

繁體中文

本研究探討IDRISI遙測影像分析程式於地滑地變遷之應用，應用各種植生指標於地滑地判釋及植生復育監測之探討。本研究使用SPOT及FORMOSA2衛星影像，以IDRISI程式進行植生指標計算，比較各種植生指標於地滑地變遷判釋之優劣。應用各種植生指標對於地滑地判釋結果，顯示Distance-based植生指標雖優於Slope-Based植生指標，但因計算Distance-based分析中之參數需利用裸露地之光譜資料求得，對於應用於大範圍監測時，會因裸露地資訊不易取得而導致計算上資料缺乏之困難。

This study applies the remote sensing images analysis program, IDRISI, to monitor and analyze the various vegetation indices of the landslide area. From this, topographic changes due to landslides and their suitability for vegetative restoration can be examined. Satellite images of SPOT and FORMOSA2 were input into the IDRISI program to calculate the vegetation indices to compare the effectiveness of the various vegetation indices in interpreting landslides. It is concluded distance-based indices are generally better than slope-based indices. However, distance-based index analysis requires parameters estimated from the spectra of barren surfaces. This spectra information may not be available in many areas and may cause calculation difficulties.

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