Research On 3D Object Editing In Web Environment

With the rapid development of the current Internet industry,the Web 3 Dimensions Geographic Information System(Web3D GIS)has been widely used in various industries and has become a new climax of today's GIS development.The most noteworthy is the 3D visualization and 3D object editing technology,which plays a key role in many fields,such as urban planning,geospatial analysis,and road traffic simulation.However,the complete geographic information system is a combination of geography,surveying and mapping,and other disciplines.Due to the unreality of the two-dimensional geographic information system in expressing three-dimensional entities and querying,analyzing and editing,it is gradually being The user has been eliminated,so the three-dimensional geographic information system has gradually become a hot topic of current development.On the other hand,the current integrated 3D GIS in many fields can only be run locally and in a single machine,which greatly limits the development of true 3D geographic information systems.Based on the typical buildings and road water systems and other attachments of the Shannan Campus of Anhui University of Science and Technology,this paper uses a relational database to store three-dimensional objects,displays three-dimensional models through plug-ins,and uses Javascript technology to establish communication between models and web pages.The client can perform the concurrent editing method of the three-dimensional space object,and the specific implementation functions are as follows:1.Use VRML's unique database EAI interface to establish the spatial organization relationship between the two,and control the storage and invocation of spatial data in the relational database when building models and editing 3D objects.2.The geographic information system established in this paper can obtain the deleted objects in a specific way by the specific methods supported by the dynamic browser language such as Javascript and Vrmlscript,and then complete the deletion function in the 3D scene.3.The system uses the geodetic coordinates of the Xi'an 80 coordinate system to establish a VRML three-dimensional entity.Based on its planar three-dimensional coordinates and elevation values,the Vrmlscript language specific function method and corresponding event routing are used to realize the addition of entities in the three-dimensional scene.Fig[28]Table[2]Reference[74]...