POTENTIAL ASSESSMENT OF RESERVED CONSTRUCTION LAND IN SHANXI PROVINCE
基于DEM、土地利用和行政数据，利用GIS技术评估山西省预留建设用地潜力，发现其总量占全省面积4.78%，人均略低于全国水平，空间上南北高、中部低，平原高于山地高原，为优化开发区和重点开发区提供用地指导。
With the background of National Major Function Zoning,potential assessment of reserved construction land becomes an important foundation for guiding reasonable land use of urbanization and determining position and developing direction of land use of zones for optimization and development.Using DEM data,1: 250 000 land use data,land use investigation data of 2005 and administrating data on county level,based on extracting rules and calculating formula of reserved construction land and GIS spatial analysis techniques,the article assessed potential of reserved construction land in Shanxi province.The results show: reserved construction land of future construction in Shanxi province amounts to 7 482.90 km2,which accounts for 4.78% of total land area,slightly higher than that of China(3.28%);reserved construction land per capita is 0.337 mu/person,which is slightly lower than that of China(0.337 mu/person);the main characteristics of spatial distribution of reserved construction land potential includes: values of north and south are higher than that of middle region,values of plain are higher than that of mountain and plateau regions;according to the values of reserved construction land per capita,the major trend of spatial distribution shows that values of the northwest and southeast region of Taiyue mountain are relatively high,while values of developed region of Taiyuan basin,Linfen basin,Yuncheng basin and Jinzhong are relatively low;besides,values of Luliang loess hilly-gully region,Xinzhou Wutai mountain region,southeast region of Jincheng and Changzhi are also low;land use orientation and development direction of Taiyuan basin,Linfen basin and Yuncheng basin of national and provincial key zones for development should focus on improving land use efficiency,consolidating existing construction land and developing potential construction land in the future.