基于BIM构建航道地形曲面模型的改进方法

Improved method of building channel terrain surface model based on BIM

针对航道工程存在的离散地形数据或地形数据空值区域导致所创建地形曲面不够光滑、会出现深凹或凸起的问题,提出采用克里金插值法(Kriging)对航道区域离散的地形数据进行直接内插填补,再通过BIM技术构建航道地形曲面模型。结果表明,离散的地形数据经Kriging空间插值生成的地形曲面模型,更贴近实际效果及地形趋势走向,可真实显现航道现状三维地形。研究成果可为测绘单位开展BIM工作提供借鉴。

In view of the problem that discrete topographic data or empty area of topographic data existed in the waterway engineering results in creation of the topographic surface which is not smooth enough and occurrence of deep concave or protruding,we propose to use Kriging interpolation method to directly interpolate and fill the discrete topographic data of waterway area,and then build the model of waterway topographic surface by BIM technology.The result shows that the terrain surface model generated by Kriging spatial interpolation of discrete terrain data is closer to the actual effect and the trend of terrain,and can truly show the current three-dimensional terrain of waterway,and it may serve as reference for surveying and mapping units to carry out BIM work.