关键词: 遥感, 自动识别, 农村居民点用地, 动态监测, 平原地区

Abstract:

The Huaibei Plain is in north of Anhui Province,there are 6 cities and 23 counties,and the area is 39 400 km2.By using GIS technique and the background data of 1∶50 000 landuse spatial database of 1993year phase,this paper drew automatically the rural housing land of 2003year phase by adopting regional clustering with TM image based on principle component analysis and morphology in Huaibei Plain.As a result of integrating the principle component analysis with morphological analysis and choosing some kinds of morphological filters and operation，we obtained a better result of automatic distinguishing.The precision of this method was above 90%.The trends degree and the relative rate of rural housing land change were calculated and analyzed.The result showed that: (1) the area of rural housing land increased 33 17995 hm2 from 1993 to 2003 ;(2) the average value of the trend degree was 083% every year;(3)the speed of the rural housing land expansion became higher;(4) the expansion extent of rural housing land had apparent regional difference.〖

Key words: remote sensing, automatic distinguishing, rural housing land, dynamic monitoring, Huaibei Plain, Anhui Province