Abstract
With the maturity of 2D GIS technology, and the development of 3D GIS and digital city, Not only can it browse roaming system, but it is more important in spatial analysis ability. The development of digital city technology for urban planning provides an effective way, with the 3D visualization technology, virtual reality technology and the applied 3D GIS spatial analysis function of 3D digital city construction. The development of the digital city faces the opportunity in this paper under the background of this 3D digital city is put forward the development and implementation of query analysis system.
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