Research On GIS Data Visualization And Data Synchronization Method Based On Hololens2

In recent years,with the continuous rise of new concepts such as digital twins and meta universe,and the gradual development of extended reality technology,the traditional PC platform can no longer meet the development needs of some industries.In industrial,medical and other application fields,hybrid reality technology and its devices have demonstrated advantages that PC platforms cannot match.Compared with PC platforms,hybrid reality devices have broken the limitations of two-dimensional displays and keyboard mouse interactions,expanding users’ work faces to the real world.The interaction mode of MR systems brings users a more natural interaction experience.There are still many problems in the integration of MR equipment and GIS technology,and the development of GIS based on MR is still in the exploratory stage.Aiming at the intersection of MR and GIS in the field of data visualization and the field of computer collaboration,this thesis combines the idea of real-time collaborative GIS,takes MR oriented GIS data loading,data integration and data synchronization as the discussion points,studies the methods of data visualization and data synchronization of MR+GIS,and constructs a prototype system.This thesis analyzes the data types supported by Microsoft Hololens2 hybrid reality device,the interactive operation mechanism,and the information describing the state changes of virtual entities,gives the GIS data visualization method and data synchronization message model for Microsoft Hololens2 hybrid reality device,and conducts optimization and dynamic loading research on the data integration of GIS data in hybrid reality scenes,and initially constructs the MR+GIS prototype system Holo-GIS.The main work of the thesis is as follows:(1)Research on GIS data visualization method of Microsoft Hololens2.Analyze the data types required for building 3D geographic scenes using MR equipment,and study the problems in loading and integrating GIS data in MR systems.Determine the visualization method of GIS attribute data in the MR system.Combining the integrated hybrid reality 3D scene with LOD technology and attention mechanism,the model is modularized and simplified,as well as dynamically loaded.(2)Research on data synchronization methods for Microsoft Hololens2.Analyze the existing collaboration types of MR based GIS,determine the collaboration methods and information required for data synchronization for Microsoft Hololens2.Analyze the interactive operation in the MR system and describe the state change of the virtual entity after the operation.Determine the necessary information and basic model operation types required to describe the virtual entity after the operation,and propose a data synchronization message model for Hololens2.(3)The prototype system Holo-GIS integrating 3DGIS data loading,scene optimization and data synchronization is built on Microsoft Hololens2 using Unity 3D,MRTK tools,Socket and other technologies,and the visualization effect and data synchronization function of multi-source GIS data on Microsoft Hololens2 are realized in the prototype system,which verifies the feasibility of the related technologies and methods proposed in this thesis.This thesis has 33 figures,6 tables,and 80 references.