| 韩征.基于多源异构数据的大比例尺地上地下
一体化城市三维模型集成方法研究[J].地质与勘探,2022,58(3):676-685 |
| 基于多源异构数据的大比例尺地上地下
一体化城市三维模型集成方法研究 |
| An integration method of 3D integrated large-scale aboveground and underground models based on multi-source heterogeneous date |
| 投稿时间：2021-10-17 修订日期：2022-02-20 |
| DOI：10.12134/j.dzykt.2022.03.017 |
| 中文关键词: 城市三维模型 城市地质模型 一体化 多源异构 空间拓扑 |
| 英文关键词: 3D urban models, urban geological model, integration, multi-source heterogeneous, spatial topology |
| 基金项目:城市空间信息工程北京市重点实验室基金（编号：20210222）资助 |
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| 中文摘要: |
| 本文通过对大比例尺城市三维模型和城市地质模型集成过程中存在的问题进行研究，提出了基于多源异构数据的地上地下一体化城市三维模型集成方法。首先将地上、地下三维模型以独立功能区为单位进行单体化处理和重组，并在单体化区域内以高精度DEM为地层的水平基准，以钻孔岩性矢量为地层的垂向基准，采用钻孔核定法对地质体穿插、建筑体悬空、河流水体交叉等不正确、不合理的三维空间拓扑关系进行处理和校正，从而在不同的地学空间实体之间建立正确的相交、相离或重合的拓扑关系，实现地上地下三维模型的一体化集成。本次选取北京南站附近4.9 km2区域开展试验，使用本方法快速、准确地解决了496处地层穿插错误、385处建筑体悬空错误和2处水体拓扑错误，取得了良好的集成效果，为已建模型的二次利用提供了机会。 |
| 英文摘要: |
| This work discussed the problems existing in the integration of 3D large-scale urban models and urban geological models, and proposed an integration method of 3D aboveground and underground models based on multi-source heterogeneous data. In this method, the aboveground and underground three-dimensional models were singulated and reorganized in units of independent functional areas. In the singulated area, high-precision DEM data was used as the horizontal datum of strata, and borehole lithology vector was used as vertical datum. The borehole verification method was used to process and correct incorrect and unreasonable three-dimensional spatial topological relationships such as improper intersected geological bodies, floating building bodies, and crossing water bodies such as rivers. In this way, the correct topological relationship of intersection, separation or overlap between different geospatial entities was established, and the integration of three-dimensional aboveground and underground models was realized. A 4.9 km2 area near the Beijing South Railway Station was selected to test this method. As a result, 496 errors of improper intersection between strata, 385 errors of floating buildings, and two topological errors of water bodies were quickly and accurately solved to realize a good integration effect, which provides an opportunity for the secondary use of this newly established 3D model. |
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