Research And Realization Of 3D Visualization About Xiaolangdi Hydro-junction

With the rapid development of the computer technology,knowledge-based economy golablization and networking the development, new century kicks off, the geographical information system (gis) technological change. The 2D GIS techniques are mature day by day and had penetrated into the social sector, but it remained evident, the 3D GIS break through the disadvantage of the 2D GIS in graphic information displaying, provides a better way for information and space analysis of interpretation, become the study and application of the new stage, for industry, will provide direct support decision-making supported.This article is based on the 3D GIS related theory and techniques, mainly for hydro-junction to security for the monitoring, and create a 3D GIS visalization based on visual XiaoLangDi hydro-junction safety monitoring and analysis systems. The main work and results are as follows:Collecting and Reading much papers and materials about three-dimensional visualization for hydro-junction and security to monitor for water conservancy department, on demand, and working out a reasonable proposal with the actual situation. Comparing advantage and disadvantage of the methods collecting data to establish a reasonable of data collection.Analysis software platfor about 3DGIS,comparing their advantage and disadvantage, base on XiaoLangDi hydro-junction regional characteristics determine a reasonable platforms, visual lifelike 3D effect on the safety monitoring for supporting the decision.Base on The 3D GIS visual theory, creat 3d hydro-junction technology line, and adopt reasonable way to deal with high precision terrain data and video data, complete the modeling and analyst the steep hill slopes, aspect, the visibility etc.Meanwhile, the hub,the office block, construct more than 300 building model, put in place on the fine proportion,and add the trees and flowers and landscapes, to complete the entire XiaoLangDi hydro-junction modeling.Finally,in the established XiaoLangDi hydro-junction this scenario, you can take go on a pleasure trip with the initiative and passive way. At the same time, in order to better monitor the implementation of the dam security, try to design a number of instruments within 3D model, establish the database, staff may be provided.