Based on MODIS NDVI, this paper studied the variation trend of vegetation index in the years of 2000 to 2004 in Ningxia area using quantitative remote sensing technique and slope method.
采用定量遥感技术及斜率法，以全球植被指数MODIS NDVI数据作为数据源，对宁夏地区2000—2004年期间的植被指数变化幅度及变化趋势进行了研究。
At the same time, based on stable slope Angle on water and underwater measured in field, we adopted diagrammatical method to predict the area.
同时，也根据野外实测的水下和水上稳定坡角，采用图解法进行坍岸范围预测。
Slope stability is a fuzzy area, fuzzy comprehensive evaluation method in the evaluation of dangerous slope is applied widely.
本文论述了用于建立判别和定量划分滑坡危险性和灾害地理信息系统的原理和方法。
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