Extraction of Summer Maize Using MODIS EVI Time Series in Huang-Huai-Hai

This paper explores the feasibility of extracting summer maize using the MODIS EVI time series imagery in Huang-Huai-Hai. We first obtained the spatial distribution of double-season crops based on three-temporal EVI imagery, and then the phenology calendar curves was generated based on the EVI seasonal variation in selected training areas of Huang-Huai-Hai. This curve can be served as a key parameter to separate the summer maize from the double-season crops. Finally, both the spatial distribution and the total area of the summer maize are obtained. The good results suggest that this methodology using MODIS-based EVI can serve as a useful tool to extract the spatial and temporal distribution of summer maize crop at the landscape or regional level.