期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 3B
页码：24-28
出版社：Copernicus Publications
摘要：Building an accurate 3D road database is important for many future advanced automotive applications. Intermap is in the process of collecting 2D road networks based on its orthorectified radar imagery and extracting elevations from its IFSAR-derived DEMs. The current 2D collection process is mainly manual, while the elevation assignment to the 2D road vectors is highly automated. This paper presents a semi-automated approach for 2D road extraction from radar imagery and discusses the challenges that we are facing in terms of assigning elevations and the approaches that we have been taking to building 3D road geometry based on IFSAR-derived DEMs. Validation results from various areas in Europe have shown that the 3D road vector products have overall vertical accuracy in the range of 0.5 to 2.0m RMSE, depending on the complexity of the area and the amount of road obstruction due to forest and buildings.
