城市土地利用空间变化趋势研究--以广州市海珠区为例

对研究区内不同年份的土地利用图进行叠置等空间信息处理运算,获得3个时段土地利用的空间变化图,将一个网格图层分别与3个时段的土地利用变化图叠加,分析各空间单元的年均变化强度指数,得到土地利用的空间变化结果.然后对年均变化强度指数进行分级统计后得到二级用地类型的土地利用空间变化情况,并结合社会经济因素加以分析,得到研究区3个不同时段的土地利用空间变化趋势.最后对主要二级用地类型的时空结构演变情况进行概括性的分析和评价.

A STUDY ON SPATIAL CHANGE TREND OF URBAN LAND-USE--A Case Study of Haizhu District in Guangzhou

Through processing of the spatial information from overlaying the land-use maps in different years, the land-use spatial change maps of three periods in the studied area are made. Moreover, they are overlaid with a grid layer, respectively, and the average annual change intensity indexes are obtained, from which the land-use spatial change can be got. Then hierarchical statistics of the indexes are made to get the spatial change maps of second class land use. By combining the analysis of social economic factors, the spatial change trend of land-use of three periods in the studied area is got. At last the variation of the spatial-temporal structure of main second class land use types is evaluated. So the purpose of grasping the law of land-use change in an all-round way can be achieved. The results of the study can be for reference of urban land-use planning.