Study On The Framework System Of Geographic Information Service

The rapid increase in the development of social Information Technology has greatly improved the demands of spatial information from governments, enterprise and citizens. Moreover, various hi-techniques promote the fast development of geo-information services together. As geo-information services is a fresh heading in the field of Geographical Information System, it is meaningful to do research on Geo-information services especially the deep study on related concept and technology and the framework of our own Geo-information services.This research focuses on studying the content and pattern on Geo-information services with research object of Geo-information service theories and its framework in the context of analyzing Geo-information services.Firstly, the development phases of Geo-information services and its prior and present research works at home and aboard are introduced.Secondly, this research references the related theories including basic concepts and patterns of present Geo-information services. Framework of Geo-information services is also analyzed and summarized, including details about technical system, information framework, services pattern, application and relevant enterprises.As National Map Service is a new focus in geo-information service, developing and providing integrated data of local or national wide is a hot topic nowadays besides collecting and storage original data. Digital National Map or Atlas is typical integrated data among digital data production.This paper analyzes necessaries, mission and content of American National Map as example. Then, a modest national web map service framework is set up based on analying of present national map.