The Study Of City 3D Modeling And Precision Based On 3DMax

With the "digital city" concept and theories have been proposed,Building a 3D scene of digital city has become the focus research. Three-dimensional virtual reality technology for three-dimensional digital city construction, which not only can be the vertical expression of spatial objects in the plane, but also can analyze and manipulate three-dimensional space and display geo-spatial phenomena for stereoscopic which gives a real feeling. Three-dimensional modeling is very central part of the digital city construction contents, With the three-dimensional model, we can make all kinds of decision rapidly and conveniently, Commodity demand determine market development, the needs of Three-dimensional digital city will continue to increase.This article include :(1) This paper systematically analyze the methods of 3DMax modeling combined with AutoCAD, Sketch UP 3D modeling and modeling methods to Sky Line, and get its advantages and disadvantages, Finally we use 3DMax modeling method combined with AutoCAD to complete modeling work.(2) Three-dimensional modeling is a very important part of the contents of the digital city construction, for this reason, we conducted a rigorous analysis by actual collection of data and related cases from the CAD precision base map, to texturing and pasting precision, three-dimensional model of the building height of precision and accuracy of terrain height in this paper, and discuss the model's accuracy requirements.(3) We investigate the extent of the fine three-dimensional data modeling through comprehensive choice of two-dimensional map, and provide modeling specifications for three-dimensional modeling.(4) We study the feasibility of a three-dimensional modeling method by combining the use of AutoCAD 3DMax modeling software to build three-dimensional models of city buildings, and verify the degree of precision and refinement practicable degree of analysis.3D City enables the user to a virtual environment, the real and comprehensive experience a variety of scenarios, Real-time, dynamic query-related information, and sharing and exchange of resources. And with the digital Platform management, it can Provides services of 3D visual information, such as urban Planning, construction and operational management, security management and decision support, which greatly improve the mutual sharing of information and sharing of urban space.