The current GIS can only deal with 2-D or 2.5-D information on the earth surface. A new 3-D data structure and data model need to be designed for the 3-D GIS. This paper analyzes diverse 3-D spatial phenomena from min...The current GIS can only deal with 2-D or 2.5-D information on the earth surface. A new 3-D data structure and data model need to be designed for the 3-D GIS. This paper analyzes diverse 3-D spatial phenomena from mine to geology and their complicated relations, and proposes several new kinds of spatial objects including cross-section, column body and digital surface model to represent some special spatial phenomena like tunnels and irregular surfaces of an ore body. An integrated data structure including vector, raster and object-oriented data models is used to represent various 3-D spatial objects and their relations. The integrated data structure and object-oriented data model can be used as bases to design and realize a 3-D geographic information system.展开更多
三维软件建模凭借它真实的场景展现和其直观的视觉感受,成了三维地理信息系统(geographic information system,GIS)领域的主要研究方向。三维软件建模法构建的模型真实、美观,能非常精细地表现地物的特征和细节。通过对3Ds Max和Sketch...三维软件建模凭借它真实的场景展现和其直观的视觉感受,成了三维地理信息系统(geographic information system,GIS)领域的主要研究方向。三维软件建模法构建的模型真实、美观,能非常精细地表现地物的特征和细节。通过对3Ds Max和Sketch Up两种不同三维软件建模方法的比较分析,总结出两种软件各自的优势,然后将两者的优点相结合,能更加快速完整地进行三维模型构建。通过对联合建模方法的研究,能够为三维软件建模提供一种更为简洁的方法,从而缩短建模的时间,减少人力消耗。展开更多
基金Project supported by the National Natural Science Foundation of China (No.49871066)
文摘The current GIS can only deal with 2-D or 2.5-D information on the earth surface. A new 3-D data structure and data model need to be designed for the 3-D GIS. This paper analyzes diverse 3-D spatial phenomena from mine to geology and their complicated relations, and proposes several new kinds of spatial objects including cross-section, column body and digital surface model to represent some special spatial phenomena like tunnels and irregular surfaces of an ore body. An integrated data structure including vector, raster and object-oriented data models is used to represent various 3-D spatial objects and their relations. The integrated data structure and object-oriented data model can be used as bases to design and realize a 3-D geographic information system.
文摘三维软件建模凭借它真实的场景展现和其直观的视觉感受,成了三维地理信息系统(geographic information system,GIS)领域的主要研究方向。三维软件建模法构建的模型真实、美观,能非常精细地表现地物的特征和细节。通过对3Ds Max和Sketch Up两种不同三维软件建模方法的比较分析,总结出两种软件各自的优势,然后将两者的优点相结合,能更加快速完整地进行三维模型构建。通过对联合建模方法的研究,能够为三维软件建模提供一种更为简洁的方法,从而缩短建模的时间,减少人力消耗。
