基于遥感卫星的地形级地理场景更新方法研究

Research on Terrain Level Geographic Scene Update Method Based on Remote Sensing Satellite

地形级实景三维是城市级和部件级实景三维的承载基础。为探索地形级地理场景快速更新方法,本文提出利用高分七号卫星影像进行三维重建方法,更新地形级实景三维地理场景。选择湖南省长株潭三市交界处约1 800 km^(2)范围作为研究区域,利用RPC参数进行平差,求解仿射模型参数和三维点坐标,同时使用多测合一、基础测绘等矢量数据作为轮廓特征约束,从而消除因噪声或匹配错误导致的高程异常,优化三维模型,提高地理场景精准度。研究结果表明,利用高分七号卫星影像更新地形级地理场景现势性更高、更真实,为地形级地理场景更新提供了一种高效、精准、低成本的途径。

Terrain level realistic 3D is the foundation of urban and component level realistic 3D.In order to explore rapid updating methods for terrain level geographic scenes,this paper proposes a 3D reconstruction method using Gaofen 7 satellite images to update terrain level realistic 3D geographic scenes.Select an area of approximately 1800 square kilometers at the junction of Changsha,Zhuzhou,and Xiangtan in Hunan Province as the research area,use RPC parameters for adjustment,solve affine model parameters and 3D point coordinates,and use vector data such as multi-survey integration and basic surveying as contour feature constraints to eliminate elevation anomalies caused by noise or matching errors,optimize the 3D model,and improve the accuracy of geographical scenes.The research results indicate that the use of Gaofen 7 satellite images to update terrain level geographical scenes has a higher and more realistic current situation,providing an efficient,accurate,and low-cost approach for terrain level geographical scene updates.