The Design And Implementation Of Electronic Map Of Indoor Location And Navigation Based On Location Fingerprints

With the rapid development of information technology and urbanization,more and more theater venues,sport stadiums,convention centers and other large public buildings are established in the city.Electronic map of indoor based on large venues with strong mobility,quick decision-making planning,easy to use and store large amounts of space geographic information has been more widely applied to everyday-life.Along with remote sensing technology and the development of the networking industry,indoor electronic map is not only a simple electronic map,and it needs to combine remote sensing and related technologies to build a huge indoor perception map information systems.Therefore,making indoor electronic map to a close with remote sensing and the networking industry and in such a complex indoor geographic information planning the optimal escape path have become the hot research of the current electronic maps.This paper firstly starts from the spatial geographic information databases,discusses the characteristics and models of object-oriented spatial data,designs a set of spatial data acquisition and processing methods for the spatial structure of indoor large venues and characteristics of the spatial data,establishes the E-R model and indexing technology in the indoor spatial.The design not only makes the indoor electronic map more versatile and scalable,but also greatly reduces the query time,which has provided a guarantee to fast planning escape path.A conceptual model of the indoor electronic map is established,then design the coordinate system and scale of positioning and navigation electronic map.On this basis,electronic map model of indoor location and navigation electronic based on location fingerprints is designed,the model not only propose the general and feasible design,but also greatly reduces the error rate in the positioning and navigation,which provide technical support to emergency evacuation.Electronic map server is the carrier of information exchange among indoor location and navigation electronic map,indoor spatial geographic information systems and user.Through the design of communication protocols,multi-threaded simultaneous processing and the definition of message structure,they truly implement seamless connection.Electronic map of indoor location and navigation based on location fingerprints can be used in the terminal equipment,provide accurate and reasonable navigation path information for large building and the response speed is fast,which it can meet the actual requirements of the project.