Meanwhile, in the process of ecological environment construction, the middle and high grade vegetation fraction degraded.
与此同时，在生态环境建设过程中，原有中、高覆盖度植被发生退化。
Vegetation fraction is a very important index to score the vegetation coverage on the land surface and is used in many aspects as one of the input parameters.
植被覆盖度是衡量地表植被覆盖的一个重要指标，在许多方面作为重要参数输入。
The results show that: VBSI may decrease the error of vegetation fraction resulted from the area of image shadow, and the error is 50% less than that from NDVI.
研究结果表明：VBSI在估算山区的植被覆盖信息上可以降低影像阴影信息的干扰，总体误差是归一化植被指数NDVI 的50%；
The results show that: VBSI may decrease the error of vegetation fraction resulted from the area of image shadow, and the error is 50% less than that from NDVI.
研究结果表明：VBSI在估算山区的植被覆盖信息上可以降低影像阴影信息的干扰，总体误差是归一化植被指数NDVI 的50%；
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