The Research And Implement Of Oblique Photography 3D Model Monomer Based On Cesium

In recent years,with the rapid development of oblique photography modeling technology,it has become a reality to produce a real-life three-dimensional model of city level in a short period of time.However,the oblique photography 3D model is a continuous,holistic triangular grid data,which is a skin of the terrain surface.Each geographic object can not be processed and analyzed separately,which limits the application of the oblique photography3 D model only in browsing the roaming level.The monomer of oblique photography 3D model is the key technology to be solved in the application of oblique photography 3D model.The monomer of oblique photography 3D model is to separately process the entity objects in the oblique photography 3D model into an independent entity that can be selected and has additional attribute information.Therefore,based on the oblique photography 3D model,It has the monomer ability to realize the basic functions of management,query,display and analysis of geographic information system,which can broaden the depth and breadth of data applications and oblique photography 3D model realize the good-looking and easy to use.In response to this problem,this paper studies the monomer technology of oblique photography 3D model based on Cesium,a three-dimensional WebGIS development framework.Firstly,it analyzes the 3D Tiles data specification supported by Cesium,and discusses the modeling process of 3D scenes generated by oblique photography modeling,which achieve the conversion 3D model of oblique photography of OSGB format into 3D Tiles.Secondly,the Cesium implementation model monomer principle is analyzed,and the model bounding box is generated by the contour data of the geographic object,and superimposed on the model to realize the monomer of the geographic object in the oblique photography 3D model.Finally,based on the monomer of the oblique photography 3D model,design and implement a three-dimensional WebGIS prototype system,having a roaming scene,monomerized oblique photography 3D model query attributes,attribute query monomerized model and buffer analysis of the model.The system validates the effectiveness of the method that monomer of oblique photography 3D model based on Cesium's.The method has a wide range of application and high practical value.