Abstract
GIS(Geographic Information Systems) is widely applied to in geography, resource management, land programming, environment inspection and testing, traffic management, city planning, scientific research, education and national defence, etc and it play a important role in the China National Economy.
Nowdays,GIS gets greatly development with the information technology developing and application areas extending. The digital city is the synthesis application of the city information technology and it covers city life management and economy such as Electronic Government Affairs, Electronic Business Affairs ,City Intelligent Traffic, municipal basic establishment management, public information service,education management, social security management,city environment quality inspection and testing and community management,etc.
This thesis is based on the spatial data querying and Stat. of Xserver and apply Java language to program and link data-base.the Xserver is used as a middle organ between the Client and the Server and shield the difference during the different Mac OS and data-base systems so as to achieve the technology of the special domain for the different clients sharing and operating convertibly with greater efficiency.At last to achieve the fuctions of displaying and browsing of the E-Map.
Keywords: Geographic Information Systems;spatial data-base;XServer