Indoor Map Data Change Detection And Update Based On User-Generated Content

With the rapid development of indoor mobile location services,people on the indoor map data of the current situation and accuracy of the higher requirements,but the traditional indoor map data update model has been unable to update the indoor map information to be updated in time Seriously restricting the further development of indoor map mobile location services.How to find the indoor map change information in a timely manner and quickly and efficiently obtain this change information to reflect it into the indoor map data,become an urgent problem to be solved,and become now the most concerned about the problem of indoor map manufacturers.However,with the continuous development of Internet technology and the popularization of Web2.0 concept,more and more public participation in the sharing of geographic information in the Internet will produce massive geographic information,user-generated content(UGC)Will be on the indoor map update and maintenance of great significance.At the same time,the popularity of mobile devices and the continuous improvement of functions,users can publish and share with anytime,anywhere with geographic information content,so that the public is no longer simply a geographic information users,has become a provider of geographic information.So make full use of the public to create the geographic information,you can expand the traditional indoor map data update data sources to achieve the indoor map update and maintenance,to better meet the needs of indoor mobile location services.However,UGC data from the public,users create UGC motivation,knowledge background,cultural literacy and data acquisition equipment,the accuracy of differences may lead to data quality problems.Therefore,this paper presents the UGC-based indoor map data change discovery and update framework and incremental update method to achieve timely updating and maintenance of indoor map data.Our research can be summarized as below:(1)Based on the analysis of the necessity of incremental updating of indoor map,this paper summarizes the research status of indoor and outdoor map updating at home and abroad,and compares the traditional version update and incremental updating method.In order to make the indoor map The data can be obtained in a timely and efficient manner,and the UGC changes the information data acquisition,the UGC change information data preprocessing,the incremental information detection of the incremental update data packet production,the incremental updating of the packet distribution of the closed loop indoor map Data Increment Update Service Mode.(2)The data source and the acquisition method of UGC change information are studied,and the problems of UGC data as the source of updating of indoor map data are pointed out.The pretreatment and audit mechanism of UGC change information data are established,and the indoor map data based on UGC Change discovery and update framework.(3)The incremental information detection method based on vector feature matching is studied,and the collected UGC change information data and historical version data are detected and the incremental information is found and extracted.This paper designs and maintains the specific structure of the indoor map data file storage structure and incremental package that support incremental updates.Identify the incremental incremental category by identifying the incremental flag,and the different incremental change categories take different incremental updates.(4)On the basis of theoretical research,we design and implement the indoor map update system based on UGC indoor map data change discovery and incremental update method.And uploads the current version of the indoor map data and the incremental packet to generate the latest version of the indoor map to realize the incremental update of the indoor map.