Text Ordinate Active Geographic Information Service Reseach And Implementation

With the extensive application of geographic information service technology,the number and quality of geographic information services have been continuously improved.Geographic information services in cyberspace are powerful and various.How to make better use of geographic information becomes a concern problem.In the case of geographic information service,how to individually recommend services,how to automatically aggregate services and how to provide better services,becomes the bottleneck of further development of geographic information service.The research on geographic information service has gradually changed from improving single service performance,quality and concurrency control to service discovery,service recommendation and service aggregation.In view of the rapid development in intelligent services and natural language processing,text ordinate active geographic information service become possible.Aimed at meeting the geographic information service need of text in office documents,a service mode of providing web map service served text was proposed.This service mode could transform the hidden needs into real needs.And a Office map plug-in of text-oriented geographic information active service was mplemented with the SOA concept.The main contents and research points of the thesis include:? The research background,significance and related theoretical on text oriented geographic information active service were discussed.Firstly this paper analyzes the application prospect of the geography information active service.Based on the problems encountered in the development and construction of the current geographic information service,the research significance of the paper is clarified.Then we introduces the research field of intelligent service,natural language processing and related theory,technology.(2)Text geographic information extraction and toponym database construction was analyzed.Firstly we introduce the method of toponym recognition based on hidden Markov chain.Secondly a toponym database and geocoding method based on graph database was proposed and implemented.Finally,the feasibility of HMM algorithm and topoym database were verified by an example.(3)The service description method based on service coordinates was proposed.the problem of geography information service dependency transmission was solve by service coordinates.What's more web map service aggregation method on the basis of service coordinates was designd and implement.Finally,geographic information service recommendation algorithm based on collaborative filtering was concerned in the paper.(4)An active service plugin for office was designed and implement.Based on the above research contents,we designed active service plugin for office.Name recognition,map service push and map embedded were achieved with the support of the office.