Research On Incremental Update Of POI Data In Public Service Platform Based On Internet Geographic Information

With the rapid development of Internet geographic information service,we have ushered in a "new geographic era".Internet geographic information has become an indispensable part of people's life and learning.At the same time,as a very important geographic in network geographic information Location service has become a hot topic of research by experts and scholars,and its content and mode have changed with the development of Internet technology.How to use Internet resources to improve the development of geographic location service and make the location service data have better current situation has become an industry development trend.POI(point of interest)is the underlying foundation of current location service data,and its current situation is an important guarantee for the quality of geographic location service.At present,the amount of Internet data is huge and the current situation is high,Therefore,the use of massive Internet information to update POI data is an effective method to maintain the current status of the data.In this paper,the incremental updating method of POI data of geographic information public service platform by using multi-source network electronic map POI data,and the problems of poor current situation and slow updating speed of the data of public service platform are improved,so as to improve the data quality of the platform and facilitate the use of the public.The research content mainly includes the following aspects:(1)The collection and pre-processing of network POI data.Through the analysis of the structural characteristics of all kinds of map service applications,and designs the network crawler algorithm based on the major map service applications to crawling the POI data on the network.The initial data obtained by crawling is faults eliminated and the POI data coordinates of different websites are corrected.POI data with unified coordinate system is obtained and stored in the database.(2)Based on the homonym matching supported by multi-attribute semantic similarity,POI data after address feature word extraction and place name simplification are identified by homonym matching supported by multi-attribute semantic similarity.The name,address similarity of POI data and the spatial distance between two points are calculated respectively,and the recognition threshold of the same name point is set.If the similarity value is higher than the threshold,the datas is the same name point.Then the matching recognition of the same name point is finished.(3)The POI data of geographic information public service platform is updated incrementally,and the updating method based on ground state modification is used to update the POI data of geographic information public service platform.Use the Internet POI data and platform data to match the same name points to obtain the same name points and incremental points of the network POI data relative to the geographic information platform data,and then extract the incremental points to update to the POI database of the public platform to realize the incremental update of POI data of the public service platform.(4)The design and development of POI fusion and update prototype system,combined with the research method of incremental update technology of multi-source network POI data proposed in this paper,designed and developed a set of prototype system about the matching and fusion of place name address and interest point,which played a auxiliary role for incremental update of geographic information public service platform.The experimental results show that it is feasible to use the Internet data to update the POI incremental of the geographic information public service platform.This method increases the means of geographic information collection and acquisition,and also provides important data and technical support for the current situation and update frequency of the POI data of the geographic information service platform.