difference vegetation index meaning in English
差值植被指数
Examples
- Advances in drought monitoring by using remotely sensed normalized difference vegetation index and land surface temperature products
基于植被指数和土地表面温度的干旱监测模型 - Then based on the method of dimidiate pixel model , the current model is improved , and the model of deriving vegetation fraction from normalized difference vegetation index ( ndvi )
然后在像元二分模型的基础上对已有模型进行改进，建立用ndvi归一化植被指数估算植被覆盖度的模型。 - This technique is mainly involved two steps : 1 ) vegetation effects correction : we used ndvi ( normalized difference vegetation index ) derived from tm and avhrr measurements for spatial and temporal variations of vegetation covers at different scales
但由于电磁波与地表相互作用的复杂性，雷达后向散射系数除受地表介电常数(土壤水分)影响外，还受到地表粗糙度、土壤类型、植被覆盖以及雷达入射角、频率、极化等多种因素的影响。 - After analysis of tm / etm + data ' s advantage over the forest change detection , tasseled cap transformation , principal component analysis and normalized difference vegetation index were chosen to enhance the vegetation spectral information . expert classification system was adopted to extract the main tree species in the littoral shelter forest
在分析etm +数据在森林资源监测中的优势的基础上，通过缨帽变换、主成分分析和植被指数法增强植被光谱信息，结合专家分类系统对沿海防护林主要树种进行提取。 - The authors have developed a device for measuring the normalized difference vegetation index ( ndvi ) by using four specially designed photoelectric detectors ; the ndvi can reflect the growing information and seasonal nitrogen fertilizer requirement of crops , and offers guidance for rational application of nitrogen fertilization
文中提出了一种由4个专门设计的光电探测器直接得到归一化植被指数的测量方法，该参数能够反映作物的生长状态，知道不同季节的农作物对氮的需求量，对实施变量精准施肥具有重要的指导作用。