| 基于区域性椭球面的三维GIS可视化模型 |
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| 引用本文： | 冯琰,施一民.基于区域性椭球面的三维GIS可视化模型[J].同济大学学报(自然科学版),2004,32(9):1192-1196. |
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| 作者姓名： | 冯琰 施一民 |
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| 作者单位： | 同济大学,测量与国土信息工程系,上海,200092 |
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| 基金项目： | 国家自然科学基金资助项目(49971067) |
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| 摘 要： | 在椭球面数字地面模型 (DTM)的基础上 ,结合道路设计领域的特点 ,将空间实体划分为独立点状实体、线实体、紧贴于地面的面实体和体实体等类型 ,通过空间现象与椭球面DTM的叠加 ,首次提出了一种直接基于椭球面的三维GIS可视化模型 ,具体实现了道路、河流、湖泊、建筑物等实体模型 ,并进一步探讨了基于椭球面上测地坐标系统的三维可视化方法 ,从而真正实现了在一个统一的真三维坐标系中表达和处理空间现象 .
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| 关 键 词： | 椭球面 数字地面模型 区域性椭球面 三维GIS可视化模型 测地坐标系 空间实体 |
| 文章编号： | 0253-374X(2004)09-1192-05 |
Three-dimensional Geographic Information System Visualization Model Depended on Ellipsoid-based Digital Terrain Model |
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| FENG Yan,SHI Yi-min.Three-dimensional Geographic Information System Visualization Model Depended on Ellipsoid-based Digital Terrain Model[J].Journal of Tongji University(Natural Science),2004,32(9):1192-1196. |
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| Authors: | FENG Yan SHI Yi-min |
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| Abstract: | In this paper, the principle and method of 3D visualization by geodesic coordinate system of ellipsoidal surface are proposed.A three-dimensional model for geographic information system(GIS) visualization by ellipsoid-based digital terrain model(DTM) is suggested for the first time.In this model spatial objects are classified as types of point,line,surface attached to terrain,body objects.By overlapping spatial phenomenon with ellipsoid-based DTM,these models of spatial entities,such as road model,rive model,lake model and building model are achieved and demonstrated in 3D visualization. |
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| Keywords: | ellipsoid-based digital terrain model regional ellipsoidal surface three-dimensional geographic information system visualization mode geodesic coordinate system spatial entity |
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