Research Reports
A Pilot Study on Estimating Rice Yield with Satellite Images
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AuthorHan, Sukho
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Publication Date2011.02.01
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Original
The purpose of this study is to conduct a pilot study on estimating rice yield by using satellite images. Many developed countries including the United States and the European Union have been using satellite images to produce agricultural statistics and outlook analysis. In Korea, some institutions have used satellite images for their analysis.
In this paper, we estimated rice yield by using satellite images. We choose rice on this study as one of target commodities. Because the yield of rice can easily be identified by using remote sensing technology. and Among the satellite images, MODIS satellite images were used, since these were free and widely used for estimating yield of major crops such as rice, wheat, soybean and or so in many countries.
The method used to classified national area for estimating national rice yield was based on a simple correlation between the county rice yield statistics and the county average NDVI(Normalized Difference Vegetation Index) extracted from Satellite images. We found that the accuracy of estimating yield depended on an average temperature for one year. So We divided a nation into 5 sectors with isotherm and tried to develop 5 yield functions with NDVI.
This study showed that remote sensing technology can actually be used to estimate rice yield. However, There is also a problem to get the clear MODIS images in appropriate time because these were easily affected by cloud. To solve this problem, it is necessary to consider using Radar Satellite images or alternatives.
Researchers: Sukho Han, Baesung Kim, Kungpil Kim, Jaehwan Kim, Marljing Kim
Research period: 2010. 4. - 2011. 2.
E-mail: shohan@krei.re.kr, bbskim@krei.re.kr, kkpil@krei.re.kr, jhkim74@krei.re.kr, kimmarljin@krei.re.kr
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