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岩石圈构造研究对构造运动、地球深部动力过程、地幔对流、资源勘探及防灾减灾有重大意义,而三维建模与可视化是研究岩石圈构造的重要手段.等值线/剖面及基于欧氏空间的三维表达与建模方法难以满足全球尺度的岩石圈真三维建模的需要;新近发展的全球三维格网建模技术的格网划分存在收敛、叠置、非正交及非经纬一致性等缺陷.基于面向球体流形空间的非收敛、非叠置、正交、经纬一致性的球体退化八叉树格网(SDOG),提出了岩石圈实体及场对象的三维流形表达与建模方法,并结合SDOG的多层次/分辨率特性及岩石圈属性的多语义性,设计了岩石圈的多尺度模型,实现了岩石圈的多尺度建模、数据组织与多模式可视化.结果表明:(1)SDOG方法有效克服了现有全球三维格网方法的格网缺陷,较传统方法更为真实、自然地反映了岩石圈的球形特征,为岩石圈空间建模、数值模拟、数据共享的统一空间格网提供了一种新的解决方案;(2)随着尺度模型的演进,更详细的板块划分、更精细的岩石圈层结构与边界凹凸以及更丰富的岩石圈属性可被渐次呈现出来.
The study of lithospheric structure is of great significance to tectonic movement, deep dynamical process of earth, convection of mantle, exploration of resources and disaster prevention and mitigation, and 3D modeling and visualization are important means to study the lithospheric structure.Concrete contour / The three-dimensional spatial representation and modeling methods can not meet the needs of lithosphere true 3D modeling on a global scale. The newly developed global 3D mesh modeling technology has the problems of convergence, overlay, non-orthogonal and non-latitude consistency Etc. Based on the non-convergent, non-superimposed, orthogonal and latitude-oriented degenerated Octagon Tree (SDOG) for spherical manifold space, this paper proposes three-dimensional manifold representation and construction of lithosphere entities and field objects Combined with the multi-level / resolution characteristics of SDOG and the multi-semantics of lithosphere attributes, a multi-scale lithospheric model was designed and multi-scale modeling, data organization and multi-model visualization of lithosphere were realized. : (1) The SDOG method effectively overcomes the grid defects of the existing global three-dimensional grid method, which is more realistic than the traditional method and naturally reflects the spherical features of the lithosphere. (2) As the scale model evolves, more detailed plate division, finer lithosphere structure and boundary bump and more abundant The lithosphere properties can be gradually revealed.