Like 2D GIS, 3D GIS needs the most basic spatial data processing functions, such as data acquisition, data organization, data operation, data analysis and data display. Compared with 2D GIS, 3D GIS has the following advantages.
The display of spatial information is more intuitive. Because people know how to understand and transform the world through spatial information, spatial information mainly exists in the form of graphics. However, displaying spatial information with two-dimensional graphical interface is very abstract, and only professionals know how to use it. Compared with 2D GIS, 3D GIS provides a richer and more vivid platform for the display of spatial information, which enables people to visualize and visualize abstract and difficult spatial information, and people can understand it with their own relevant experience, thus making accurate and rapid judgments. Undoubtedly, 3D GIS has unique advantages in visualization. Although the dynamic interactive visualization function of 3D GIS also puts forward special requirements for computer graphics technology and computer hardware, the appearance of some advanced graphics cards, workstations and projection devices with touch function can not only fully meet the requirements of 3D GIS for visualization, but also bring unexpected display and experience effects.
Multidimensional spatial analysis is more powerful. The analysis process of spatial information is often complex, dynamic and abstract. Faced with a large number of complicated spatial information, the spatial analysis function of 2D GIS often has certain limitations, such as advanced spatial analysis functions such as inundation analysis, geological analysis, sunshine analysis, spatial diffusion analysis and visibility analysis, which can not be realized by 2D GIS. Because 3D data itself can be restored to 2D, 3D GIS can naturally include the spatial analysis function of 2D GIS. The powerful multidimensional spatial analysis function of 3D GIS is not only a leap of GIS spatial analysis function, but also fully embodies the characteristics and advantages of GIS to a greater extent.