遥感数据成为GIS愈来愈重要的一种数据源.栅格数据与矢量数据之间的快速转换是RS与GIS集成中的关键技术之一.本文通过分析遥感分类图栅格像元之间的关系,快速自动地提取矢量数据点及其连接信息,进而利用连接信息快速生成弧段,由弧段自动组建多边形并建立完整的拓扑关系.实验表明,该方法是一种由遥感分类图自动转换成GIS通用数据的高效方案.

Remotely sensed data is becoming more and more important in GIS application. Data conversion between raster and vector is one of the key technologies for the integration of RS and GIS. In this paper, we analyzed the relations between pixel and pixel in the classified raster map. Based on the relations, all vector points and the connection information between them can be extracted. All arcs are traced rapidly by using the connection information between points. Polygons and the topological information between polygons are built automatically from the arcs. Finally, the experiment demonstrates that the method is a highly efficient scheme to automatically convert classified raster map to general format GIS data.