Research On3D Visualization Of Surveying And Mapping Training Base Of Sty

Since twenty-first Century, the computer technology in the aspect of software andhardware, has made rapid development, the geographic information system supported bycomputer technology (GIS) technology has made tremendous achievements. At present, thetwo-dimensional GIS technology is relatively mature, and deep into the social life of all walksof life, with the further development of technology of graphics theory, database theory, andapplication requirements of individual industry strongly promote energetically,3D GIS it ispossible to study and develop.In this paper, based on the theory of technology of3D GIS technology, comprehensivetraining base of Shaanxi Institute of Surveying and mapping of iron as the carrier, and theestablishment of the Institute of Surveying and mapping proposed iron comprehensivetraining base of3D GIS visualization system, mainly to complete the base of3D terraindisplay, distance measuring, area, buffer analysis, section analysis, optimal path analysis,visibility analysis and roaming flight implementation. The main research work and results areas follows:A collection of papers relating to the reading of many3D visualization and data,including water conservancy, mining, geology, petroleum, carries on the demand analysis tothe three-dimensional visualization integrated training base of Shaanxi Institute of Surveyingand mapping of iron, to develop a reasonable plan and detailed with topography and otherconditions. Comprehensive comparison of advantages and disadvantages of various datacollection, determine the best data acquisition plan.Analysis of the advantages and disadvantages of3D GIS software mainstream at present,combined with regional characteristics of Shaanxi Institute of Surveying and mapping of ironcomprehensive training base, selected a reasonable platform, as far as possible the mappingreality iron comprehensive training base lifelike.Based on the3D GIS visualization theory, establish line of3D visualization technologyin iron of Surveying and Mapping Institute comprehensive training base, adopting reasonablemethods, processing of terrain and complete image data,3D modeling, and the analysis of thebase, pavilion, office area, railway, bridge and culvert, fine modeling and in accordance with the actual proportion and position place, add flowers and trees, landscape, complete the wholetraining base of3D modeling and Realization of roaming, etc..The Design Institute of Surveying and mapping the iron comprehensive training base of3D visualization system has been applied in the project of training in the teaching process. Incontrol surveying, engineering surveying and digital mapping course, need the whole areacarries on the brief introduction to the students, the application of this system can controlpoint position, training area and detail point selection method were explained in detail, greatlyfacilitate the work of teaching.