Key Technology And Implementation Of Web 3D GIS Under Urban Pipe Network

As one of the important infrastructures of the city,the urban pipe network bears the material energy transfer work necessary for the people's life,and is called the "lifeline" of the city.With the rapid construction of smart cities,the three-dimensional pipe network information system for the pipe network plays a decisive role in urban management and emergency.However,the traditional network pipe network system relies on plug-ins and has poor browser compatibility,which cannot meet the requirements of most users for the portability and real-time performance of the network three-dimensional pipe network.With the continuous innovation of Internet technology and high-performance computer hardware.WebGL technology for 3D graphics visualization in the network environment has become increasingly mature.Based on the advantages of WebGL technology,this paper uses the existing 2D CAD pipe network data of Tianjin Normal University Gymnasium to automatically generate 3D model data of pipe network,and studies the 3D pipe network rendering visualization and spatial analysis method based on Cesium framework on the Web,obtain the following research results:1.Based on the characteristics of pipe network data,the standard data structure and storage model were developed.The various pipe networks of Tianjin Normal University Gymnasium were used as the research object of the experimental area.Then the algorithm of automatic modeling was studied,and finally realized visualization process for automated 3D modeling based on CAD two-dimensional city pipe network data;2.Research on scheduling and visualization algorithms for massive underground pipelines in 3D scenes;3.According to the actual use requirements of the management personnel of the experimental area,the Cesium library is supported by the basic GIS platform.In the network transmission mode of B/S service architecture,based on WebGL technology,a three-dimensional scene prototype system supporting the scheduling and visualization of massive urban pipe network model is realized.4.The common spatial analysis functions is implemented based on the pipe network system.This paper is based on the three-dimensional pipe network visualization system built on the Web side,which makes up for the shortcomings of manual pipe network manual modeling and error-prone,which meets the requirements of user portability and practicability,and provides positive reference value for managers in management planning and emergency.