The Research And Realization Of Embedded GIS

As a base operation tool disposing spatial information, GIS(Geographic Information System) is widely used in domain of mapping,city layout,military affairs,goods circulating and so on. Since GIS deal with a lot of spatial information and the request of hardware is very high all along,it is usually used in the PCs of super workstation and configue. In recent years, with the development of technology, GIS begins to move towards embedded equipment, such as PDA, cell-phone, roof box, etc., the equipment using GIS is called embedded GIS.The application of Embedded geographical information is a focus of the present geographical information technical development, the typical application of embedded GIS is made up of embedded hardware system, embedded operating system and embedded GIS software. Embedded GIS can be widely applied to traffic, military affairs, mapping, medical treatment, automobile navigate and so on, with the development of communication technology, computer technology, embedded products, the application domain of embedded GIS will be wider.The administrative department of the expressway usually need input,query, search, Stat and analyse the datum such as the diseases of expressway in the daily maintainment management. With our country increasing the investment in expressway, expressway newly builded, reconstructed, mileages that extended has increased day by day, the maintenance management task of the administrative department of the expressway increases correspondingly too. The effeciency of traditional method inputing data with pen at paper and some other traditional management being very low and searching inconveniencly has already been far from meeting department's everyday control of the expressway needs.The development Based on PDA GIS not only can input fast and manage the data of expressway disease, but also can realize data visual, make uninteresting data management ocular and convenient, improved the working efficiency of the administrative department of the expressway greatly, bringheavy direct economic benefits for the maintaining administrative department, and can obtain the enormous social economic benefits.Main content of this paper around research and development on " the inputing expressway maintain datum system whih PDA", it explains emphatically the key technology and implementation method how to utilize PDA inputing expressway maintain data and realizing that PDA datum in pace with desk-top database and finally Realize inputting the maintain datum once only, discusses the method obtaining space data and making electronic map, introduce some background knowlege of embedded system and the knowledge of the embedded move database, embedded GIS technology, etc..The full paper can be divided into three major parts:1. Summary of Embedded geographical information system.2. The design of the inputing expressway maintain datum system with PDA.3. The realization of the inputing expressway maintain datum system with PDA.