ABSTRACT
There are still some problems existing in the above researches for NDVI changes in non-natural ecological fields. First, its time series is short and not enough to cover the early stage, metaphase, and later stage of mining; Second, its coverage area of images is small and not enough to include the directly affected, indirectly affected and unaffected areas; Third, its normalized interpolation algorithm of imaging time is often unreliable, it leads to a difficult expression of the dynamic characterization by monthly, seasonal and inter-annual.
