Three-dimensional is the collection as well as after computing and analyzing the data performance, display. Three-dimensional data relative to two-dimensional data can better show the objective reality.
Three-dimensional GIS and two-dimensional GIS, need to have the most basic spatial data processing functions, such as data acquisition, data organization, data manipulation, data analysis and data performance. Compared with 2D GIS, 3D GIS has the following advantages.
The display of spatial information is more intuitive. Since people know how to recognize and transform the world through spatial information, spatial information mainly exists in graphical form. However, presenting spatial information with a 2D graphical interface is very abstract and only professionals know how to use it. Compared with 2D GIS, 3D GIS provides a richer and more realistic platform for displaying spatial information, enabling people to visualize and intuitively visualize abstract and difficult-to-understand spatial information, which people can understand by combining with their own relevant experience, so that they can make accurate and fast judgments. Undoubtedly, 3D GIS has unique advantages in visualization. Although the dynamic interactive visualization function of 3D GIS puts forward special requirements for computer graphics technology and computer hardware, the successive introduction of some advanced graphic cards, workstations, and projection equipment with touch function can not only fully satisfy the visualization requirements of 3D GIS, but also bring unexpected display and experience effects.
Multi-dimensional spatial analysis is more powerful. The process of analyzing spatial information is often complex, dynamic and abstract, and in front of a large number of spatial information with complex relationships, the spatial analysis function of 2D GIS often has certain limitations, such as inundation analysis, geologic analysis, sunlight analysis, spatial diffusion analysis, through-viewing analysis and other high-level spatial analysis functions, which can not be realized by 2D GIS. As the 3D data itself can be downgraded to 2D, 3D GIS can naturally accommodate the spatial analysis function of 2D GIS. The powerful multi-dimensional spatial analysis function of 3D GIS is not only a leap in the spatial analysis function of GIS, but also fully embodies the characteristics and superiority of GIS to a greater extent.