Research And Implementation On The Geographical Information Query System Based On Web

The Geographical Information System (GIS) has been developing for over 40 years, and it is widely used. It turns to be a comprehensive system concerning computer science, geography, survey, remote sense, and cartography. Today, the GIS becomes more large than the before and it can interoperate with other systems so that to process complicated tasks. The expansion of GIS enables the share and exchange of spatial data. A geographic information system with open interface will promote the exchange spatial data between users and systems.The spread of Internet provide a new opportunity for GIS, WebGIS has been a hotspot of GIS technology. Nowadays, there are many methods for WebGIS development such as CGI/Server API(Common Gateway Interface/Server Application Programming Interface), Plug-In and Java Applet/ActiveX. At present, the WebGIS based on CGI/Server API still has been applied widely because this method is steady-going and easy to use. Considering the current network situation, we presents a WebGIS model based on CGI/Server API on Server and Plug-In on Client. Lastly, we give an application instance of this model in the Common Information Query System of Zhuhai city based on MapGuide.This system is already bringing into service, the applied results prove that the system is reasonable credible and practical, software's function is perfect, convenient to upkeep and operate.