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提出利用 GIS与 TM资料集成技术估算中国南方丘陵山地早稻种植面积的方法。该方法首先利用 ARC/INFO对土地利用现状图进行数字化 ,建立拓朴关系后将其转化为栅格 ,然后进行投影变换 ,使土地利用现状图、行政图、TM数据具有相同的坐标 ,最后利用土地现状图 ,提取水田分布图 ,对水田分布图进行分类估算早稻种植面积。不同方法比较结果表明 :非监督分类法不能用于提取丘陵山区的水稻种植面积 ;只用 TM资料估算龙游县早稻面积 ,与统计数据相比 ,平行六面体分类法、最大似然分类法精度分别达到 82 .83%和 5 9.95 % ;而用 GIS与 TM资料集成技术对水田分布图进行分类估算早稻面积 ,平行六面体分类法、最大似然分类法的估算精度分别达到93.98%和 6 0 .6 5 % ,所以利用平行六面体分类法对南方丘陵山地早稻种植面积估算是可行的
A method of using GIS and TM data integration technology to estimate the planting area of early rice in the mountainous areas of southern China was proposed. Firstly, the land use map is digitized by using ARC / INFO. After the topological relations are established, it is transformed into raster, and then the projection is transformed to make the land use status map, administrative map and TM data have the same coordinates, finally, Land status map, extract paddy field distribution map, paddy field distribution map to estimate the area planted early rice. The results of different methods show that the unsupervised taxonomy can not be used to extract the rice planting area in hilly areas. The TM data only estimate the area of early rice in Longyou County. Compared with the statistical data, the accuracy of parallelepiped classification and maximum likelihood classification are Reaching 82.83% and 59.95%, respectively. However, the estimation accuracy of early rice area, parallelepiped classification method and maximum likelihood classification method using GIS and TM data integration techniques to estimate paddy field distribution reached 93.98% and 60.6 5%, so the use of parallelepiped classification of mountainous areas of southern rice planting area estimation is feasible