| 一种海量三维管线分图幅集成、展示与管理方法 |
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| 引用本文： | 詹勇.一种海量三维管线分图幅集成、展示与管理方法[J].城市勘测,2020(1):19-24. |
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| 作者姓名： | 詹勇 |
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| 作者单位： | 重庆市勘测院 |
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| 基金项目： | 国家重点研发计划项目资助(2018YFB0505400);重庆市社会与民生保障科技创新专项(cstc2018jscx-msyb1232)。 |
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| 摘 要： | 在加载展示海量三维管线模型,特别是场景中还兼有城市精细模型、三维数字地形等多种三维数据时,存在模型数量大、加载效率低的问题,本文提出了一种三维管线分图幅组织与管理的方法。基于二维分图幅管线数据,将同一图幅内的所有管线三维模型组合成单个或数个模型,降低模型数量,并将其作为建立空间索引的最小单元,提升空间索引效率;同时,通过合并模型的有序组织,实现对其内部的每个管线模型的访问和操作,例如查询、选择、变色、半透明、显隐等,支持了三维管线管理与应用;在模型合并的基础上,本文还建立了两级管线LOD,实现了海量大范围三维管线的集成展示。最后,本文利用重庆市三维管线普查数据,开展了项目实验和项目应用,验证了方法的有效性和实用性。
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| 关 键 词： | 三维管线 分图幅 模型组合 多细节层次 管线集成 |
A Method of Integration,Display and Management of Mass Three-dimensional Pipeline Based on Different Map Sheets |
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| Affiliation: | (Chongqing Survey Institute,Chongqing 401121,China) |
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| Abstract: | When loading a massive 3D pipeline model,especially when there are many 3D data,such as 3D urban fine model,3D digital terrain and so on,there are some problems such as large number of models and low loading efficiency.This paper presents a method of organizing and managing for 3D pipeline based on different map sheets.On the basis of spatial grid division,all pipeline models in the same sheet are combined into a single independent model,and it is used as the smallest unit to build the spatial index,so as to reduce the number of models and improve the efficiency of spatial indexing;At the same time,through the orderly organization of the intra combined model,the access and operation of each pipeline model within the combined model can be realized,such as query,selection,color change,translucency,display and hiding,and so on,So it supports the management and application of 3D pipeline.Based on pipeline combination,this paper also establishes two level pipeline LOD,and realizes the integration and display of mass large scale 3D pipeline.Finally,this paper uses the data of Chongqing pipeline survey to carry out project experiment and project application,and verifies the validity and practicability of the method. |
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| Keywords: | 3D pipeline map sheet model combination level of detail pipeline integration |
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