The Research And Implementation Of Location Based Services Based On Changsha Geographic Information Public Service Platform

With the advent of the information age, the city of informatization construction has become an irreversible trend, geo-spatial location service as mainstream services of information technology,it’s affected area is broad, it applied to the mapping, planning, land, electricity and other government departments as well as logistics, mobile communications, facilities management, commercial use, It’s realization is not only bring great convenience to the public daily life, work and study, but also for the government departments at all levels of professional application bring the enormous social benefit and economic benefit. Digital city construction vigorously complying with the trend of the city informatization construction. City geo-spatial basic frame is a important component of the" Digital China", geographic information public service platform is carrier of provide location service, the key is spatial data construction, is the basic of realize all function.Under this background, this paper focuses on the location service function and operation flow of Changsha city geographic information public service platform to design, aim at the situation of existing spatial data are difficult to meet the application demand from the form, quality, contents and forms and so on,to discuss and design the data integration and complement updating method of support location service framework data. After the completion of data,to design database construction、the spatial organization and management form of geographic entity data, electronic map data, image data, names address data, height data and so on.Design system and detail to name and address inquire service, improved on the basic of traditional geographic coding model, proposed one kind of Chinese word segmentation algorithm based on the factor analysis rules, to improved the service participle matching accuracy and efficiency.