%0 Journal Article
%A WANG Xue-ting
%A ZHANG Sha
%A DENG Fan
%A ZHANG Jia-hua
%T Mapping the Cultivation Areas of Summer Maize Using Spatial Variations of Crop Phenology over Huanghuaihai Plain
%D 2019
%R 10.3969/j.issn.1000-6362.2019.10.005
%J Chinese Journal of Agrometeorology
%P 647-659
%V 40
%N 10
%X Considering the phenological differences of maize along with latitude over a large area, the planting area of summer maize was extracted by MODIS EVI time series curve over Huanghuaihai Plain in this paper. Based on Landsat images and MOD13Q1 dataset, the MODIS EVI time series curve of summer maize was obtained in a reference area. The phenology observation data from the agro-meteorological stations were collected to build the relationship between various summer maize growth stages and latitude. The latitude was used to correct the MODIS EVI time series curve of summer maize in the reference area, and then the standard EVI time series curve of summer maize was obtained. Using the mean absolute distance (MAD) method and p-tile algorithm, the summer maize planting area was estimated in the study area. The results showed that the areas of summer maize extracted from remote sensing images in Beijing, Tianjin, Hebei, Henan and Shandong were 125.3×103, 162.6×103, 2231.8×103, 2963.6×103 and 2731.9×103ha, respectively. Meanwhile, the accuracy of extraction result in each province was above 80%. The determinant coefficient (R2) is 0.82 and the root mean square error (RMSE) is 147.8×103ha at city level, and 0.62 and 17.7×103ha at county level, respectively. It indicated that the method in present study has the ability of extracting the summer maize planting area effectively and provides a new idea for estimating the planting area of other crops in a large region.
%U https://zgnyqx.ieda.org.cn/EN/10.3969/j.issn.1000-6362.2019.10.005