Area extraction and spatiotemporal characteristics of winter wheat-summer maize in Shandong Province using NDVI time series

The use of remote sensing to rapidly and accurately obtain information on the spatiotemporal distribution of large-scale wheat and maize acreage is of great significance for improving the level of food production management and ensuring food security. We constructed a MODIS-NDVI time series dataset,...

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Bibliographic Details
Published in:PloS one 2019-12, Vol.14 (12), p.e0226508-e0226508
Main Authors: Dong, Chao, Zhao, Gengxing, Qin, Yuanwei, Wan, Hong
Format: Article
Language:English
Subjects:
Accuracy
Agricultural production
Agriculture - methods
Algorithms
Application programming interface
Biology and Life Sciences
Classification
Computer and Information Sciences
Corn
Crops
Datasets
Ecosystem
Engineering and Technology
Environmental Monitoring - instrumentation
Food
Food production
Food security
Forests
Fourier analysis
Harmonic analysis
Information science
Interpolation
Methods
Monitoring methods
Mountain regions
Physical Sciences
Planting
Production management
Quality
Remote sensing
Remote Sensing Technology - methods
Research and Analysis Methods
Rivers
Satellite Communications
Seasons
Security management
Spatial distribution
Spatio-Temporal Analysis
Summer
Temporal distribution
Time series
Triticum - growth & development
Triticum aestivum
Vegetation
Wheat
Winter
Winter wheat
Zea mays - growth & development
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Summary:The use of remote sensing to rapidly and accurately obtain information on the spatiotemporal distribution of large-scale wheat and maize acreage is of great significance for improving the level of food production management and ensuring food security. We constructed a MODIS-NDVI time series dataset, combined linear interpolation and the Harmonic Analysis of Time Series algorithm to smooth the time series data curve, and classified the data with random forest algorithms. The results show that winter wheat-summer maize planting areas were mainly distributed in the western plains, southern region, and north-eastern part of the middle mountainous regions while the eastern hilly regions were less distributed and scattered. The winter wheat-summer maize planting areas in the study area continued to grow from 2004-2016, with the most significant growth in the northern part of the western plains and Yellow River Delta. The spatial planting probability reflected the planting core area and showed an intensive planting pattern. During the study period, the peak value and time for the NDVI of the winter wheat were significantly different and showed an increasing trend, while these parameters for the summer maize were relatively stable with little change. Therefore, we mapped a spatial distribution of the winter wheat and summer maize, using the time series data pre-processing synthesis and phenology curve random forest classification methods. Through precision analysis, we obtained satisfactory results, which provided a straightforward and efficient method to monitor the winter wheat and summer maize.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0226508