运用NOAA AVHRR和Landsat TM数据估算多年水稻种植面积

介绍了综合运用NOAA AVHRR和Landsat TM数据进行多年水稻种植面积监测的一种方法,以湖北省为例,首先运用Landsat TM数据计算了该省1992年的水稻种植面积;接着运用1992年和1994年的NOAA AVHRR数据分别计算这两年的水稻像元数,以这两年水稻像元数的变化来反映水稻种植面积的变化;最后运用线性模型,估算1994年的水稻种植面积。所得的1994年水稻种植面积与湖北省农调队资料相比精度为84.5%。运用同样的方法估算1995年该省的水稻种植面积,精度达90%以上。

Using NOAA AVHRR and Landsat TM to Estimate Rice Area Year-by-year

Remote sensing technology has been widely applied in crop area and production esti- mation.How to forecast the crop area year-by-year has been a key concern of remote sens- ing specialists.In this paper,the methodology of a study from 1991 to 1995 for rice plant- ing area estimation integrated with NOAA AVHRR and Landsat TM data was introduced. Rice area in 1992 was estimated using Landsat TM data.Rice pixels in 1992 and 1994 were calculated and the rice area variation was deduced from NOAA AVHRR data of the two years.With a linear statistical model,the rice planting area of 1994 was forecast.Its accura- cy was 84.5 percent compared with the data released by the Agricultural Investigation Team(AIT) of Hubei province.Similar method was applied to estimating the rice area of 1995.The result showed a 91.6 percent accuracy compared with the AIT data.