數值地形模型在邊坡滑動檢測應用技術之探討

本研究運用空拍機拍攝的照片以轉換的模式，生成數值地形模型影像與正射影像圖，以定期拍攝設置之固定控制點與觀測點，進行歷次的影像套疊比較，如坡面觀測點產生位移即可依此研判邊坡滑動規模。結果顯示，地面控制點之適當佈設對量測精度提昇極其重要，在區域地物容許條件下儘可能以較低飛行高度可得較佳成果。空拍機在飛行高度35公尺與重疊率80%條件進行研究設定，研究之影像與現場量測數值比對之總平均誤差率為0.16%，可提供降低空拍機量測誤差技術之參考。

關鍵字

空拍機；數值地形模型；邊坡滑動

並列摘要

In this study, the numerical terrain model and orthophoto images were generated using the converted model. In addition, they took pictures of fixed control points and observation points at regular intervals for comparison. If the slope observation point produces displacement, we can determine the slope sliding scale according to this. The results show that the proper layout of ground control points is essential for improving measurement accuracy, and better results can be obtained with a lower flying height as far as possible under the allowable conditions of regional features. The aerial camera is researched and set under a flying height of 35 meters and an overlap rate of 80%. The total average error rate of the comparison between the analyzed image and the field measurement value is 0.16%, which can provide a reference for reducing the measurement error of the aerial camera.

並列關鍵字

Aerial camera ； Numerical Terrain Model ； Slope sliding

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