【摘要】 针对线性工程因线路长、范围广、自然环境复杂的特点，导致规划论证阶段难以快速掌握沿线自然条件的问题，本文以实景三维数据作为地上空间基底、三维地质模型数据作为地下空间基底、专题数据作为数据要素底板，构建了地上地下一体化的三维空间场景，并基于三维场景制定了线性工程三维选址论证分析的流程方法。以青岛规划高速公路为例，三维选址论证分析可快速掌握沿线的地上实景现状、地下地层断裂构造及各类专题要素等情况，有效提高了线性工程选址论证的效率和质量，为线性工程提供了地上地下一体化的三维选址论证新模式。更多还原

【Abstract】 In this paper, we aim to address the challenge of quickly grasping the natural conditions along linear projects during the planning and demonstration stages. This difficulty arises due to the long routes, wide ranges, and complex natural environments involved. To overcome this, we utilize 3D real scene data as the above-ground spatial base, 3D geological model data as the underground spatial base, and thematic data as the data element base. Through this approach, we construct a 3D spatial scene that seamlessly integrates both above-ground and underground aspects.Subsequently, we have developed a process for conducting 3D site selection demonstration analysis in linear engineering based on this 3D scene.To illustrate the effectiveness of our approach, consider the proposed construction of expressways in Qingdao as a case study. This analysis can quickly understand the terrain and topography, actual situation, and geological fault structures along the line, significantly enhance the efficiency and quality of site selection for linear engineering projects. Overall, our work presents a novel model for conducting site selection demonstrations in three-dimensional spatial scenarios for linear engineering projects.更多还原