Disclosed is a geographic information system which comprises a multithreading client and a multithreading server cluster. The multithreading client includes at least one user interface, at least one client coordinator, map data, at least one map manager, at least one client-side spatial analyzer, at least one cache manager, at least one data requester, and at least one information communicator. The multithreading server cluster includes: at least one servlet, at least one image accessor, at least one map configuration mechanism; at least one data storage access mechanism, at least one data source manager, and at least one server-side spatial manager.