Design And Implementation Of 3D Virtual Geographic Information System For Digital Villages

In recent years,with the proposal and implementation of the Rural Revitalization Strategy,the party and the state have made major measures to promote the comprehensive revitalization of rural industry,ecology and culture,establish and improve the modern rural governance system,and ensure and improve the growing needs of the farmers for a better life.At the present stage,China's rural infrastructure construction is still relatively backward,the ecological environment problems are more prominent,and the development of rural industrial integration is weak.In order to improve the ability of rural governance and explore the modern rural governance system,combined with 3D GIS science,this paper studies the 3D visualization technology and spatial data analysis of real rural.Taking Lianzhang village,Lianjiangkou Town,Yingde City,Guangdong Province as the research object,this paper focuses on the 3D real modeling and the development of GIS platform,designs and realizes the 3D virtual reality of digital rural The specific work and achievements include the following aspects:(1)With the help of oblique photography modeling technology and Super Map 3D GIS application platform,the scene integration technology of multi-source data model construction is studied,and the data fusion of digital orthophoto,digital elevation model,oblique photography model and building information model is completed.Through the model optimization of data layer and data slice cache service of server layer,the scene of webgl client can be loaded and displayed efficiently.(2)According to the actual needs of business,aiming at the display of rural tourism cultural characteristics,based on webgl client development programming technology,the system platform designs and realizes the function module of 3D scene roaming and 2D map linkage,which is convenient for users to accurately present the specific position in the roaming route.In view of the management and query function of the party building,enterprise,scenic spots and other characteristic buildings in Lianzhang village,the system platform adopts two design schemes: the simplification of tilt photography model and the establishment of attribute database to complete two-dimensional and three-dimensional data association and point information query.(3)In the three-dimensional spatial analysis function development module,it mainly realizes the functions of measurement analysis,visibility analysis,skyline analysis and supporting model re editing in the three-dimensional scene.It provides the basic platform and planning suggestions for the key regional construction of Lianzhang village under the background of rural revitalization,and helps to further promote the development of digital rural economy and build the National Rural Revitalization model village.(4)Combined with the visualization technology of the front-end framework,we use ecarts,A-frame,cesium to provide data information graphical display,VR panoramic view,particle effects and other related functions to realize the optimization of data display and scene rendering.