基于既有不动产测图数据的地形级实景三维构建

Terrain-3DRS Generation Based on Existed Real-estate Mapping Data

地形级实景三维主要由数字高程模型与数字正射影像经实体化,并融合实时感知数据构成。高程模型(DEM)作为一种重要的基础地理测绘产品,其生产及快速更新具有重要意义。本文对特征线自动提取与处理和道路面高程恢复及异常处理等关键技术进行了研究,形成了湖南省基于既有不动产测绘成果生产省域2m格网高精度DEM的技术方法,实现实用型地形级实景三维建设。实验表明该方法可有效提高地形级实景三维的生产效率和成果精度。

Terrain-3DRS is mainly generated from digital elevation model and digital orthophoto,and real-time monitoring data integrated as well.DEM(digital elevation model)is an important basic data in surveying and mapping field,and its updating has significant meaning.This paper discussed the key points of automatic feature line extraction and road-surface elevation recovery in DEM generation,and formed an effective way of 2-meter-grid high-precision DEM generation based on the existed real estate mapping data of Hunan Province,and obtained practical terrain-3DRS.The experiment analysis shows that the proposed way in the paper could improve the productive and prescion of terrain-3DRS.