The Discussion On3D Electronic Map Application Mode

In recent years, under the support of the computer graphics,3DGIS, virtual reality and geographic database and virtual scene modeling technologies and theories, three-dimensional electronic map is gradually becoming important supplement of the traditional electronic maps, and along with the further development of the computer software and hardware technology, are more likely to become the mainstream of electronic map development in the future.At present, the3D electronic map in military command, city emergency command, virtual reality, urban management, entertainment, tourism, urban planning and the design of the road engineering industries and fields, there have been some successful applications. But we also should realize that for quite a long time, on the basis of the modem cartography theory and computer hardware and software of the electronic map, is still the3D electronic map production and processing of data base. In realizing it at the same time, we should also believe that in the field of electronic map3D electronic map is the most potential.Based on the above understanding and the Xinjiang Urumqi city development zone and large build smart grid city management mechanism of the project, the author participated in and created3D electronic map based on Google SketchUp within the scope of1.7square kilometers in the open area. Under the background of it,3D electronic map application mode was proposed. The purpose of this subject raised is to try to make the3D electronic map based on the Google SketchUp as a kind of geographic base map, which based on the production of the3D electronic map based on the Google SketchUp, combining with the current3D electronic map in the city emergency command, virtual reality and some successful examples of application in city management, discussing its concrete application model, and its future application prospect and assumptions.This paper first briefly introduces the geographic’s several constitutes and some of the concepts, including basic geographic information database, basic topographic map and orthograph as graph and digital elevation model. And these are described in detail, mainly introduce their application, at last expound the comprehensive application of these. Then through3D electronic map production process based on the specific Google SketchUp, discuss about the precision of the3D electronic map in the production process, and draws some conclusions. Finally discuss about the3D electronic map in the city emergency command, the application of virtual reality and the urban management pattern, mainly introduced the application mode of geographic base map for3D electronic map. Through these concrete successful application, come to the conclusion that3D electronic map based on Google SketchUp can be applied in the field and the industries such as urban management.Focus of this paper mainly has three aspects:the first aspect is discussed in detail the concepts and several kinds of the composition of geographic base map, and its application is discussed in detail, expounding their specific application field, finally through the comparisons, coming to a conclusive summary. On this foundation raises a idea that3D electronic map based on the Google SketchUp can be used in geography; The second aspect is briefly introduced the production process of3D electronic map based on the Google SketchUp, and in the process of production about the accuracy of3D electronic map problem has made the detailed elaboration and analysis, and draws some conclusions.There are some certain reference and reference value for the improvement of the accuracy of3D electronic map; The third aspect is discussed in detail the3D electronic map as a geographical map used in the city emergency command, virtual reality and the application of city management, through example expounds the powerful role of3D electronic map as a geographical map in the above three application field, and thus can come to a conclusion that3D electronic map based on Google Sketch Up as a geographical map can be used in the field of city management and so on. At the end of the text is the outlook and vision of3D electronic map based on Google SketchUp.