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題 名 | 坡向影像在鯉魚潭水庫集水區土地利用分類之研究=A Study of Aspect Images on Land Use Classification of Slopeland in Liyutan Reservoir Watershed |
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作 者 | 陳文福; 林文傑; 洪文傑; | 書刊名 | 水土保持學報 |
卷 期 | 29:2 1997.06[民86.06] |
頁 次 | 頁183-195 |
分類號 | 436.124 |
關鍵詞 | 坡向影像; 鯉魚潭水庫集水區; 土地利用分類; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以鯉魚潭水庫集水區之 SPOT 衛星影像進行山坡地土地利用分類之研究。 分別以全集水區之 SPOT 影像及依區內九個坡向分割出之九個坡向影像進行『非監督式分類 』。 另利用 GPS 現場測量之結果配合像片基本圖和航空照片以選取當時之訓練樣區進行『 監督式分類』。在不了解試區之情況下進行非監督式與監督式分類時,以同一年份且時間相 近之航空照片和像片基本圖作為輔助,能增加對試區的認識及減少分類判釋之錯誤並可省掉 現場踏勘的時間。 茲將研究結果摘述如下:1、以 SPOT 衛星影像進行土地利用分類時,若 能依九個坡向將影像切成九幅影像並進行分類,除可消除因坡向因子所造成分類之混淆外, 並可節省及提高其分類之準確度,且較客觀。2、利用 GPS 現場測量之結果配合像片基本圖 和航空照片以選取當時之訓練樣區進行監督式分類,雖可提高其分類之準確度,惟其耗費之 時間較長,且具主觀性。 |
英文摘要 | In this study, the SPOT images of Liyutan Reservoir watershed were used for land use classification. Two images (whole wide image of the watershed, the nine images derived from nine aspect) were used to do unsupervised classification. On the other hand, the measured results by GPS with air-photos and photo-maps were used to do supervised classification. In case of not knowing well to the watershed, when we use supervised and unsupervised approach to classify the land-use and use the air-photos and photo-maps which the time were close in the same year, it helped us to know more and reduced the error of recognition and saved time to measure on field. The results indicate that the nine aspect images help reduce the error of the cross results caused by topographic effect, save time, increase its accuracy and provide more objective classification. The supervised approach use the field measured results of GPS with reference to air-photos and photo-maps and then select the training area to classify the land-use. Although it could increase the accuracy of classification, it is more time-consuming and more subjective. |
本系統中英文摘要資訊取自各篇刊載內容。