Method for extracting cultivated area of winter wheat in Huang-Huai plain area by moderate resolution satellite data based on winter wheat planting system
A technology of satellite data and winter wheat, which is applied in the field of satellite remote sensing agriculture, can solve the problems of low time resolution of images, inappropriate survey of winter wheat planting area, and high cost
Active Publication Date: 2012-10-03
SHANDONG AGRI SUSTAINABLE DEV INST
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Problems solved by technology
Although the improvement of the spatial resolution of images and the improvement of image processing technology have made the extraction accuracy of winter wheat planting area reach more than 90%, but due to the low time resolution of images, it is greatly affected by the weather, and the cost is high, so it can only be obtained in a small area. Application, not suitable for large-scale survey of winter wheat planting area
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Embodiment 1
[0044] Embodiment 1, take the winter wheat of Shandong Province as an example
[0045] like Figure 1-5 shown.
[0046] A method for extracting the planting area of winter wheat in the Huanghuai Plain region based on the winter wheat planting system using medium-resolution satellite data, including the following steps:
[0047] (1) Data acquisition
[0048] Winter wheat in Shandong Province was sown in mid-to-late October and tillered in early-to-mid-December. Since some greenhouse vegetables were in the transplanting period in mid-to-late October, the vegetables grew rapidly after slowing seedlings in December. The NDVI value change was similar to that of winter wheat, which affected the extraction accuracy of winter wheat area. . Shandong Province is also the main producing area of garlic. Garlic is sown from late September to early October. The growth state of garlic in winter is very similar to that of winter wheat, which is an important obstacle to the extraction o...
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The invention provides a method for extracting cultivated area of winter wheat in a Huang-Huai plain area by moderate resolution satellite data based on a winter wheat planting system. The method comprises the steps of obtaining data; extracting cultivated area of mechanically-sowed winter wheat; extracting cultivated area of wheat after rice; and combining the areas of winter wheat in two planting modes to obtain the cultivated area of winter wheat. The method has the advantages that a free MODIS image with moderate space resolution and high time resolution is utilized to solve interference problem of garlic and greenhouse vegetables in a process of extracting the winter wheat; data of the cultivated area of the winter wheat can be extracted in the second half of December; the time for obtaining a result is early for four months in comparison with the method for obtaining the result by NDVI value of the winter wheat during the elongation stage, the precision is more than 90%, and the requirements for obtaining data in a large area can be satisfied.
Description
technical field [0001] The invention relates to a method for extracting the planting area of winter wheat in the Huanghuai Plain by using medium-resolution satellite data (MODIS data) based on the planting system of winter wheat, and belongs to the technical field of satellite remote sensing agriculture. Background technique [0002] Remote sensing technology has become a tool for agricultural resource investigation and crop growth monitoring because of its objective, accurate and timely data acquisition. The use of remote sensing technology to obtain the planting area of winter wheat can save manpower and material resources and improve the accuracy of data. [0003] The key to extraction of winter wheat area is the selection of data source and time period. In the 1990s, the third-generation practical meteorological observation satellite (NOAA satellite) of the National Oceanic and Atmospheric Administration of the United States was used to obtain the planting area of ...
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Inventor 隋学艳张晓冬党伟杨丽萍杨洁姚慧敏王素娟袁奎明郭洪海
Owner SHANDONG AGRI SUSTAINABLE DEV INST