中国土地利用时空数据平台建设及其支持下的相关研究

20世纪 90年代中期 ,我们建立了国家资源环境动态信息服务运行系统。在土地利用数据库的建设过程中 ,其中 5 2 0 L andsat TM遥感影像经过地理配准和几何校正后 ,在全数字解译环境下 ,解译并绘制了 1∶ 10万的土地利用图。现已将其矢量数据转换为 1km的栅格数据 (包括所有高分辨率的、通过计算每个网格内各土地利用类型的面积百分比而获得的土地利用信息)。因此 ,国家资源环境动态服务系统可用来监测国家尺度的土地利用的变化。

The Establishment of Land-use Spatial-temporal Database and Its Relative Studies in China

In the mid-1990s, we established the national operative dynamic information systems on natural resources and environment. In the process of establishment of the land-use database, 520 scenes of remotely sensed images of Landsat Thematic Mapper (TM) were interpreted at scale of 1∶100 000 under overall digital software environment after being geo-referenced and ortho-rectified. The vector map of land-use in China at the scale of 1∶100 000 was recently converted into a 1-km raster database that captures all of the high-resolution land-use information by calculating area percentage for each kind of land use category within every cell. Being designed as the operative dynamic information serving systems, monitoring the change in land-use/land-cover at national level was executed. We have completed the updating of LUCC database by comparing the TM data in the mid-1990s with new data sources received during 1999～2000 and 1989～1990. The LUCC database has supported greatly the national LUCC research program in China and some relative studies are incompletely reviewed in this paper.