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題名 | 遙測與GIS應用於集水區大型坡地開發之變遷分析=Application of Remote Sensing and GIS in Assessing Changes of the Large-Scale Land Development of Watershed |
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作者 | 陳文福; 鄭新興; | 書刊名 | 水土保持學報 |
卷期 | 29:1 1997.03[民86.03] |
頁次 | 頁41-59 |
分類號 | 436.124 |
關鍵詞 | 大型坡地開發; 常態化差異植生指標; 遙感探測; 地理資訊系統; Large-scale hillslope land development; BHLD; Normalized difference vegetation index; NDVI; Remote sensing; Geographic information system; GIS; |
語文 | 中文(Chinese) |
中文摘要 | 本研究利用鳳山溪集水區之三期SPOT衛星影像,結合GIS資料、輔以像片基本圖、 航空照片及赴現場查核並加以分析比較,期能探討及獲取近年來集水區內大型坡地開發之快 速變遷資訊,以有效地監測集水區內土地利用╱覆蓋之變遷情形。 SPOT 衛星影像經地形效 應校正、影像分類、影像套疊及與 GIS 主題圖層套合分析等步驟, 以坡地開發前、後之常 態化差異植生指標 (NDVI) 影像,將兩個幾何位置完全對位的影像加以比對,再將變遷地區 加以判釋與分析。由於區內其餘局部小地區之變遷在短期間內與全區大型坡地開發之面積相 比為量甚微,故集水區內大型坡地開發區之變化更易監測。本研究即利用此特性,假設在短 期間內僅大型坡地開發區發生極大變化,其餘地區無甚變化或變化相對甚小之情況下,以衛 星遙測技術結合 GIS 技術, 已能方便迅速而又準確地將變遷區域做重點式地勾勒並描繪出 來,並定量化地指出土地利用變遷面積之大小及其所在位置,進而達到開發區監測之目的。 |
英文摘要 | Three SPOT images with different dates were used together with geograp- hic information system (GIS), aerial photographs, and situ checking, to analyze efficiently and compare the land-use/cover changes of Feng-Shan Creek Chi watershed. The rapid changes of watershed large-scale hillslope land development (LHLD) were monitored in this study. The area changes can be analyzed via image interpretation and thematic layers of GIS data base. A comparison can be made using two normalized difference vegetation index (NDVI) images. The changed Zonesin the BHLD are relatively easier to detect if we assume that small area changes are negligible in comparison with the LHLD's area. This assumption was made in this study with regard to the size and location of land-use/cover changes. Rapid and correct detection of LHLD was achieved in this study. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。