GIS System Research And Developmenet For Mobile Application

Management Information System(MIS) is applied widely. It manages ordinary information, like text, numeric, etc. MIS simply expresses data and is lack of support for visualization, decision support and decision making technology. Geographic Information System(GIS) is an information system that manages and explores data of geographic information including spatial and property data. Compared with MIS, GIS has the powerful ability of analyzing spatial data and visualization technique to express spatial data, topology relation and analysis results. The application of GIS is extended to many fields which are associated closely to our life.In this paper, possibility and strategy of merging about GIS and MIS is studied based on analyzing technical characteristics. For GIS which organizes and manages spatial data with mixed model, it is proposed the"MIS Subject Map"technology to eliminate the obstacles of GIS data layer linkage to MIS, and make use of ActiveX components to provide operations of one another.A GIS software system——SwiftGIS, based on supporting mobile application, is designed and realized using the platform of Microsoft Visual C++ 6.0, which adopts Components GIS technology and integrates ESRI company's MapObjects2.2 control components.. SwiftGIS provides GIS general functions such as map zoom, travel, map layer management and spatial data query etc., in addition, it also provides characteristic GIS application, such as GPS simulation tracking, mobile locating service, path analysis, air view and integration with MIS based on information nodes management.System architecture and design scheme of spatial data map layers and function modules are described systematically. Road net information data required by path analysis is studied and a new road net model based on path analysis is proposed. By line segments extracting and points separating technologies, the road net topology file and road topology network are generated quickly.Derived from the traditional calculating method ,i.e. Dijkstra algorithm, the visualization analysis procedure of the shortest path finding is improved by adopting the data structure of adjoining table data structure and binary heap to complete the operation of priority queue. Calculation experiment gets the satisfactory results.