高分辨率卫星影像更新铁路大比例尺地形图的应用

Application of Renewing Large-Scale Topographic Maps by Using High-Resolution Satellite Images in Railway

针对某些铁路工程建设中大比例尺地形图现势性不足的问题,提出了基于高分辨率卫星影像的地形图更新方法。工程试验结果表明,沿线路方向每10 km布设一个地面控制点对卫星成像模型进行精化,通过精化后的成像模型和DEM对卫星影像数字微分纠正后,其平面精度满足1∶2 000地形图平面更新的要求,可用于铁路初步设计阶段。

This paper proposes a method of updating topographic map based on high resolution satellite image in view of the dated large-scale topographic map in railway engineering. The engineering practice results show that the satellite imagery can meet the topographic map accuracy of 1∶2 000 scale when laying just one ground control point along the route with distance no more than 10 km,it can be used in the preliminary design of railway.