Earth observation satellite imagery having medium-resolution can provide the useful information very rapidly and cheaply. The objective of this study was to assess the feasibility for monitoring rice growth and yield using medium resolution satellite imagery at Seosan AB reclaimed area, Chung-nam province. Using the LANDSAT imagery at booting stage (29th July 2004), NDVIR had the most significant linear relationships with rice yield of Seosan AB reclaimed area with the cor-relation coefficient (r) as 0.68. Therefore, this relationship was established as rice yield equation as function of NDVIR, where excluding the 10 small area having low number of pixel, the determination coefficient (R2) of the linear regression between NDVIred and milled rice yield was improved to 0.66. In addition, raster masking method, which was easier and faster even if a little unaccurate than preexisting method, was established for extracting infor-mation paddy field zone. Adaptability of rice yield equation function of NDVIR on year and region was investigated using rice yield and NDVIR values, which were extracted with raster masking method, from 7 counties or cities, Kyeong-ki province in 2005. Relationship between observed and calculated rice yield showed 1:1 line indicating that the adaptability was admitted.
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