Application And Technique Of Visualization In Road Survey Based On AutoCAD

Three-Dimensional visulization research is the important development direction of geographic information system.Lively description and the expression to the realistic environment is the common characteristic.Namely:Under the computer environment and by using the computer graphic image theory and method to produce a series correlative image for the information processing,thus enhances understanding to the two-dimensional or the three-dimensional space relations.This article make reserch on three-dimensional model of road and analysise to realized this model essential technology and discussed three-dimensional visualization in the road construction survey,and proposed theory of the modelling,the system input,the dynamic demonstration, the inquiry and realization method.This article studies the content to be main as follows:1.Based on the current situation and tendency of visualization,the author make research on three dimensional visualization overall model,discusse the three dimensional visualization data model and construction,the algorithm,the spatial inquiry and analysis,the three dimensional surface model.2.Studied the application of elementary theory and the method of special analysise,proposed real-time dynamic control elementary theory and the method,and make research on how to realize it.3.Developed system of realtime and dynamic control of survey in road construction.Introduced the choice of system platform,the system functional frame construction,the demonstration of main function.