| Aiming at highway in liaoning province highway maintenance work quota annual plan project on-site audit the process efficiency is low,long cycle and manpower into big problems,based on the analysis of GIS software framework and insight into the maintenance quota at home and abroad on the basis of actual demand,research and design a set of highway 2 3 d integration system based on WebGIS,It realizes the information management and visual expression of multi-source heterogeneous data of highway,and solves the time-consuming and laborious problem of on-site decision of highway maintenance quota.The.main research contents are as follows:1)Propose the data organization and management method of highway two-threedimensional integrated system.Based on the characteristics of geospatial data and basic highway data,and according to the correlation between different types and structures of highway data,the storage structure of relational database,spatial database,document database and 3D model database is designed to realize the multi-source heterogeneous data reasonable storage and fast search.2)Component WebGIS system is designed based on three-tier architecture.Based on Mapbox and Cesium technology,the two-three dimensional integrated system is constructed.Research and analysis of maintenance quota requirements,complete the functional design of highway two-three-dimensional integration system,detailed planning of the road retrieval module,two-dimensional map module,panoramic module,binocular module,threedimensional earth module,highway basic data visualization module functions.In-depth study of two-dimensional,three-dimensional visualization and spatial analysis related technology,for highway development of professional application functions3)Visualization of 2D vector map and 3D earth.Research vector slicing technology and data format deeply,design slicing map service scheme for two-dimensional vector map.The 3D Tiles data format is analyzed,and the position adjustment of manual model and the dynamic monomer of 3D real model are studied,so as to realize the visual expression of model in 3D earth.The paper studies the domestic and foreign two-dimensional and three-dimensional linkage methods,and puts forward the mutual response mechanism and two-dimensional and three-dimensional linkage method of the highway two-dimensional and three-dimensional integration system,which solves the problem of multi-module linkage.The system has been tested by the highway data of Shenyang,and the feedback of system effect is good,which provides a basis for the establishment of maintenance quota plan.It can not only show the geographical distribution and overall characteristics of the highway from the macroscopic point of view,but also visually show the spatial relationship of the highway and the damaged condition of the roadbed and pavement from the microscopic point of view.It can meet the demand of modern highway and provide reference for other maintenance quota work. |
