上海城市高精度DEM空间数据库建设与应用研究

Research on the Construction and Application of the Shanghai High-precision DEM Spatial Database

城市高精度数字高程模型DEM(Digital Elevation Model)是智慧城市建设和管理的重要基础数据。基于上海基础地理框架数据和局部三维激光扫描数据,构建了覆盖全市的高精度DEM,并创新地采用了对象化管理技术实现了不同精度DEM数据的融合,建立了上海全市统一的DEM空间数据库和相应的数据库管理系统,实现了上海全市海量DEM数据的高效管理和动态更新。针对上海DEM的应用需求,还深入研究并实现了DEM基础分析算法和发布了全市DEM彩色晕渲图服务,相关成果在上海智慧城市建设的土地规划、市政和水务等领域发挥了重要的作用,对其他城市的DEM的管理和应用工作具有借鉴意义。

The high-precision DEM is one of the most important basic data for the construction of smart Shanghai. In this paper, the Shanghai DEM database was built by using the DEM object management method and merging DEM con- structed by city framework data and 3D laser scanning, and the DEM management system was developed to manage and maintain massive DEM data effectively. According to the DEM application needs, several basic analysis algorithms and DEM render map were developed which are used in the city planning, municipal and water management of smart shang-hai.