Research And Application Of 3D City Model Method Based On City Engine

With the construction and development of digital city(smart city) in recent years, more attention paid to the three-dimensional model reconstruction which based on the large-scale of citylevel, mainly rely on the traditional artificial method of three-dimensional modeling to single buildings as a unit for mass the model is obviously difficult to meet the actual demand. The computer program automatically and efficiently introduced into the massive amounts of data in three-dimensional modeling is the inevitable choice, it will be the future direction of development.Firstly, this article compared the current mainstream modeling tools and modeling methods, finally selected rules modeling method which based on City Engine, because it not only can directly be programmed automatic two-dimensional data modeling, and the built three-dimensional model still has all the properties of two dimensional data. Secondly, by programming rules, this paper conducted a program of rapid three-dimensional reconstruction mainly focuses on important part of the city(buildings, roads, green belts, ground, water), established the basic rules in line with the characteristics of the template cities. Finally, taking part of neighborhood of Ganzhou City as an example, the vector quantization to buildings, roads and so on for modeling objects, this paper quickly achieved the three-dimensional reconstruction of the experimental area by applying programming rules.After a three-dimensional model built in the City Engine can be three-dimensional view, view the properties, modify parameters directly and simultaneous display, and rules-based input statistics class report, such as analysis of the total area of the region, the total construction area, volume rate, etc. Established three-dimensional model can be transported into a dedicated three-dimensional analysis tool as Arc Scene to professional three-dimensional analysis, such as three-dimensional buffer, three-dimensional measurement, sunlight,etc. Built three-dimensional scene model can also be published on the Web Scene to share with others.