路域DEM数据变化区域标定方法的探讨

针对道路建设引起的路域DEM数据变化范围的标定问题,该文探讨了基于多源数据的标定方法。该方法首先提取设计成果的外边界作为核心变化区,再根据该区域100m范围内道路建设前后的遥感影像提取出植被发生明显变化的区域作为野外调查和建模处理的区域,并对该区域内融合构建的DEM数据和原有带状地形图构建的DEM数据进行差异分析,求出最终的DEM数据变化区。以杭瑞高速毕都(毕节至都格)段为例开展的实验研究表明,该文提出的方法可以精确地标定因道路建设引起路域DEM数据的变化区域,可直接用于DEM数据增量的采编与更新操作。

The discussion on calibration method of DEM data changing area in road domain

According to the calibration problem of DEM data changing area in road domain caused by road construction,this paper discusses the calibration method based on multi-source data.Firstly,this method extracts the outer boundary of the design results as the core area.And then,based on the remote sensing image before and after the road construction in the 50 meters of the core area,take the region where vegetation is significantly changed as the range of field survey and modeling processing.The final DEM data change area is obtained by the difference analysis of the DEM data generated by the road design results and the DEM data generated by the original zonal topographic map.Take Bidu(Bijie to Duge)road of Hangrui expressway as the the research object,the experimental results show that the method in this paper can accurately calibrate the variation area of DEM data caused by road construction,and can be used for acquisition and updating of DEM data.