Abstract
Traditional urban planning is generally expressed in a two-dimensional geographic information system, but its performance is limited to the plane direction. It cannot give people more natural feelings and visionary experiences. The rapid development of three-dimensional geographic information systems brings people geographic information. The three-dimensional intuitive experience, but the traditional three-dimensional geographic information system has the disadvantages that the spatial properties are incompatible, the image rendering speed is slow, and the visualization effect is poor. In this paper, the traditional domain-oriented processing method is improved in spatial data processing and modeling. An optimized object-oriented optimization algorithm is proposed. The three-dimensional geographic information is optimized based on a dynamic multiresolution model and multilevel detail processing technology. The rendering of the system enhances the visualization. Based on the optimization algorithm of data processing and visualization technology proposed in this paper, the spatial data processing platform GISdata of 3D GIS is designed in this paper. At the same time, the 3D GIS is visualized based on OpenGL visualization software. It is shown that the optimization algorithm proposed in this paper has excellent preexperimental effects.
Highlights
Ere are still immature phenomena in three dimensions [9]. e traditional visualization technology is primarily not giving proper attention to the details and textures. It results in poor visual image effects and is not conducive to highlighting the advantages of a 3D geographic information system [10]. e main contribution of this paper is given below: is paper optimizes and improves the disadvantages of data processing and visualization based on 3D GIS visualization technology
This paper proposes a multilevel detail processing scheme, which is a geometric description that uses different precisions for an object according to different displays. e higher the detail of the object, the more detailed the data; the finer the description, the lower the level of detail
E texture projection technique based on multilevel detail processing technology is compared with the unified resolution model. e comparison table is shown in Table 1 below
Summary
The appearance, deletion, and update of objects. e static operation includes the collection and the distance calculation processing in the European space and space’s merging [11]. e boundary representation and structure representation are usually used to deal with spatial entities with information in different spaces. E structure representation is based primarily on basic geometric constructions such as spheres, cylinders, and the like It needs to use the regular Boolean operation to construct the three-dimensional structure of the geometry. (2) e three-dimensional formal data structure, which is mainly extended based on the two-dimensional data model, its key four essential elements: nodes, arcs, edges, and faces are the original data of the entity and other geometric relationships between the entities. Spatial structure architecture and domain functions are essential elements that make up a domain-based model. E data representation method of the commonly used domain-based model is the spatial segmentation method, essentially collecting body features. The method’s geometry does not contain topology information, so the accuracy of its description is affected by the amount of data This method requires coding and commonly used methods such as three-dimensional running coding and octree coding. The object’s shape, the viewpoint coordinates are based on the origin as the viewpoint, which is necessary to complete the framing transformation. e screen coordinates are obtained from the perspective coordinate system. e primary purpose is to display the scene from a given viewpoint for accurate display. e resulting perspective effect, Figure 5, is the actual perspective effect
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