Building Real Scene Complete-information Map Model Construction Method

Indoor-Location Based Services(LBS)is an important application field in smart cities and other fields,and it is also a major demand for emerging industries in national development strategies and the commanding heights of international technological and economic competition.In recent years,outdoor location service technology has developed rapidly and has become increasingly mature,but indoor location services,which are called the "last mile" in location services,are still in the early stages of development and are facing many problems and challenges.As the basis and information carrier of indoor location services,building maps play a vital role in the development of indoor location services;in addition,the three-dimensional scenes for smart cities also need to rely on building maps to realize the high-fidelity seamless connection between the macro scene and the local fine model.As a core influencing element in the development of indoor location services and smart cities,building maps have important theoretical research significance and practical application value.Building maps are currently a research hotspot in the field of architecture and GIS,and many scholars at home and abroad have conducted extensive research on related content.Existing data models and data specifications still have obvious limitations when applied to building maps,and cannot meet the universal needs of multiple applications under complex architectural environments.Among them,the following three issues are the most core,(1)Building map model construction and data organization expression issues in complex scenarios;(2)Building map model and indoor positioning and navigation coordination issues;(3)Management and scheduling of massive data information in building map model.This paper takes buildings as the core element,and selects the refined building information model(BIM,Building Information Model)as the main data source for the construction of building maps in complex scenes.The highly Interactively integrated building real scene complete-information map model is built based on the idea of BIM and GIS integration,which is adapted to the needs of multiple applications in complex building environments.Based on the building real scene complete-information map model,the building map engine is designed and developed for the scheduling and loading of massive data in the building map model.The main research contents of this paper are as follows:(1)Research on the data preprocessing method of the building real scene completeinformation map model.This research selects the BIM model as the "raw material" and performs lightweight processing on it,removes redundant information,and then collects the geometry,semantics,topology,voice,video,and texture data required by the building real scene complete-information map model.Analyze and store into the corresponding data format to meet the needs of subsequent building real scene complete-information map model construction research.(2)Research on the construction method of building real scene complete-information map model.After data cleaning and effective information extraction of existing data,research on model construction methods is carried out to complete the construction of the entity model and the network model respectively,and then use the model link to complete the interactive combination between the entity model and the network model.Based on the division of element scale,the information in the model is integrated to realize the final construction of the building real scene complete-information map hybrid model.(3)The development of the building map engine and the empirical research on the building real scene complete-information map model.Based on the building real scene completeinformation map model,a building map engine was designed and developed,and its data storage structure and scheduling loading mechanism were discussed in detail.On this basis,combined with Android development technology and Web GL rendering technology,the mobile phone indoor positioning and navigation system and the building three-dimensional visualization and analysis system were developed respectively to prove the feasibility and use value of the building real scene complete-information map model in the engineering application.This paper proposes a building real scene complete-information map hybrid model and a set of corresponding construction methods and technical procedures,and demonstrates the feasibility of the building real scene complete-information map model and its construction method through empirical application.It can meet the needs of actual production applications,and focus on exploring the engineering application of the building real scene complete-information map.