摘要：以年际同期归一化差值植被指数(Normalized Difference Vegetation Index，NDVI)作为评价指标，分析极端干旱气象对西南地区生态系统影响的时空分布特征，提出旱灾可能..
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复归一化差值植被指数 Renormalized Difference Vegetation Index
的归一化差值植被指数 Normalized Difference Vegetation Index
本文利用杭州市1994年和2004年两个时相的TM影像，生成热岛分布图、归一化差值植被指数（NDVI）图。
The LandSat-5 TM images in 1994 and 2004 were used in this study to create UHI maps, normalized difference vegetation index(NDVI)maps.
归一化差值植被指数(NDVI)是植被生长状态和空间分布的指示因子，区域气候对植被生长起着重要作用，两者具有密切的相互关系。
NDVI is an indicator of vegetation growth and its spatial distribution, with has a close relationship with climate conditions.
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