Multi-scale Representation Of3D Digital Model

With the development of computer hardware and software and3D visualizationtechniques, forms the map more and more species are more abundant. Among them,three-dimensional map of the three-dimensional model based on the geographical space canbe more intuitive, three-dimensional image of the way to express the geographic space, andgradually people’s attention. However, the design of three-dimensional geospatial modelsimulation mostly stay in the high stage, the feature model is often not representative of thegeneral construction of the feature can not be reused, is not conducive to the overall systemicmap, and there are a lot in the production process repetitive work, the amount of data model isalso large. So we go to understand the demand side and the production side of both balancedperspective, three-dimensional models of different scales presented before the demand side isrightMulti-scale representation of three-dimensional data model is to establish the same place,the same architectural model of the city, through the study of the texture of the model andmodeling techniques, the use of the original coding, classification theory, reduce the graphicsload. Thus by secondary development SKYling of, in accordance with the requirements of thedemand side to make reasonable arrangements load three-dimensional digital model, whichallows three-dimensional digital model can smooth out expression multiscale. The mainfindings:1to multi-scale traditional2D maps, understanding the theory of two-dimensional mapsof varying scale, analysis, and compared with a three-dimensional map scale.2Through discussions load textures and three-dimensional digital model of the model toreduce the three-dimensional map of the load, to achieve smooth browsing maps.3.The establishment of regional and individual models of different scales, and thus be onthe three-dimensional digital model of multi-scale expression studies.4.Research In TerraExplorer Pro environment, try to browse through its designated flightmode, navigate to the three-dimensional model.