基于WebGIS的城市户外广告查询系统的构建

城市户外广告是城市空间信息的重要组成部分。通过城市地理信息系统和Internet相结合，建立一基于Internet的城市户外广告查询系统有着重要的现实意义，通过对各类WebGIS的对比分析，提出了建立城市户外广告互联网查询系统的具体系统框架。

Construction of Urban Outdoor Advertisement Inquiring System On WebGIS

Urban outdoor advertisement is an important constitution of urban spatial information. It is the main stream of current development and study on urban geographic information system as to how to effectively manage urban spatial information using geographic information system. It is of great significance to set up an inquiring information system of urban outdoor advertisement based on Internet by means of combining the urban geographic information system with Internet technology. By the comparison and analysis of all kinds of WEBGIS, the system framework of construction of urban outdoor advertisement based on Internet technology is advanced in this paper firstly. Then the system is further constructed where Java language was adopted to develop Java Applet to realize the system functions. Through sending a Java Applet request command to the server from the client, the Java applet will be downloaded to the client browser, the server accept the request, and then do the corresponding processing, at last provide the results in JPEG or GIF files to the client and display the outputs by Java Applet. The main functions of the system include the graphic display of urban outdoor advertisement, query from graphics to attributes and the attributes to graphics, spatial information searching and statistic analysis.