利用球体剖分瓦块构建真三维数字地球平台

doi:10.11947/j.AGCS.2015.20140128

测绘学报 ›› 2015, Vol. 44 ›› Issue (6): 694-701.doi: 10.11947/j.AGCS.2015.20140128

利用球体剖分瓦块构建真三维数字地球平台

王金鑫¹, 郑亚圣¹, 李耀辉¹, 禄丰年², 刘俊楠¹

1. 郑州大学水利与环境学院, 河南郑州 450001;
2. 河南省测绘地理信息局, 河南郑州 450003

收稿日期:2014-03-13 修回日期:2014-10-22 出版日期:2015-06-20 发布日期:2015-07-28
作者简介:王金鑫(1968－),男,博士,副教授,研究方向为空间信息网格、GIS理论与应用。E-mail: jxwang@zzu.edu.cn
基金资助:
测绘遥感信息工程国家重点实验室开放基金(12I02); 矿山空间信息技术国家测绘地理信息局重点实验室开放基金(KLM201203); 教育部大学生创新实验项目(201310459046); 郑州大学研究生教育专项基金(ZYJ2014050)

Building the Platform of Digital Earth with Sphere Split Bricks

WANG Jinxin¹, ZHENG Yasheng¹, LI Yaohui¹, LU Fengnian², LIU Junnan¹

1. School of Water Conservancy & Environment, Zhengzhou University, Zhengzhou 450001, China;
2. Henan Administration of Surveying, Mapping & Geo-information, Zhengzhou 450003, China

Received:2014-03-13 Revised:2014-10-22 Online:2015-06-20 Published:2015-07-28
Supported by:
Open Fund of State Key Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing(No.12I02);Open Fund of State Key Laboratory of Mine Spatial Information Technologies, National Administration of Surveying, Mapping and Geoinformation(No.KLM201203);College Students Innovation Experiment Program of the Ministry of Education (No.201310459046);Zhengzhou University Graduate Student Education Special Fund Project (No.ZYJ 2014050)

摘要/Abstract

摘要： 全球离散网格是面向空间大数据的模型框架,常用于构建数字地球平台。基于球体的剖分瓦块不仅可以构建真三维的数字地球模型,而且可以实现天地一体化的空间数据集成、融合、表达和应用。本文详细论述了球体大圆弧QTM八叉树网格的剖分原理、网格几何特征分析和编解码方法等理论体系,并利用剖分瓦块实现了球体的任意分割以及地下、地表和空中实体的可视化建模。研究表明,球体QTM网格具有剖分规则简单、体系规整、几何特征明晰,适用性强等特点,尤其是可以推广到椭球。因而,该方案可用于天地一体化的空间数据的组织、管理与应用。

关键词: 全球离散网格, 地球系统空间网格, 四元三角网, 数字/智慧地球, 空间数据模型

Abstract: Discrete global grids, a modeling framework for big geo-spatial data, is always used to build the Digital Earth platform. Based on the sphere split bricks (Earth system spatial grids), it can not only build the true three-dimensional digital Earth model, but also can achieve integration, fusion, expression and application of the spatial data which locates on, under or above the Earth subsurface. The theoretical system of spheroid geodesic QTM octree grid is discussed, including the partition principle, analysis of grid geometry features and coding/ decoding method etc, and a prototype system of true-3D digital Earth platform with the sphere split bricks is developed. The functions of the system mainly include the arbitrary sphere segmentation and the visualization of physical models of underground, surface and aerial entities. Results show that the sphere geodesic QTM octree grid has many application advantages, such as simple subdivision rules, the grid system neat, clear geometric features, strong applicability etc. In particular, it can be extended to the ellipsoid, so it can be used for organization, management, integration and application of the global spatial big data.

Key words: discrete global grids (DGGs), Earth system spatial grid(ESSG), quaternary triangular mesh(QTM), digital/smart earth, spatial data model

中图分类号:

P208

王金鑫, 郑亚圣, 李耀辉, 禄丰年, 刘俊楠. 利用球体剖分瓦块构建真三维数字地球平台[J]. 测绘学报, 2015, 44(6): 694-701.

WANG Jinxin, ZHENG Yasheng, LI Yaohui, LU Fengnian, LIU Junnan. Building the Platform of Digital Earth with Sphere Split Bricks[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(6): 694-701.

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利用球体剖分瓦块构建真三维数字地球平台

Building the Platform of Digital Earth with Sphere Split Bricks

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