应用遥感技术辅助更新县级土地利用基础图件的方法研究

以甘肃省平凉市四十里铺镇为例,研究利用TM和SPOT图像数据辅助更新县级土地利用基础图件的方法。将遥感影像、土地详查矢量数据、计算机辅助发现的变化图斑在同一坐标空间进行栅格矢量的混合叠置,然后进行人机交互提取变化信息,建立变化图斑层的拓扑关系。在GIS的支持下,修改编辑变化图斑层,建立完整的拓扑关系,并利用GIS的矢量叠加功能,将变化图斑层与详查数据库进行叠加运算,生成新的土地利用数据库文件。

Study on the Method of Updating County-Level Landuse Base-Map Using Remote Sensing Technology

According to an example, this paper introduces a technical procedure to update the base map of landuse. First, some raster and vector data (such as remote sensing images, landuse investigation vector data, and changed map patches obtained by computer assistant tool) were overlapped in a same layer. Then, the various information were retrieved in the interaction process, and topology relations were set up based on the changed map patches layer. Supported by the GIS, changed map patches layer was modified and compiled, and the topology relations were built. Finally, using the GIS vector overlay function, the changed map patches layer was overlapped and calculated with detailed database to create the landuse database files.