GIS中基于Web的图形查询系统

摘要

介绍了基于Web的地下管线图形查询系统(Web GIS)的设计思路和具体的实现。它的主要特点是采用了ActiveX技术，可以在已有代码的基础上，将现有的GIS系统中的部分功能转移到基于Web的三层C/S结构的新系统中。新系统不仅继承了传统GIS系统的优点，同时充分利用了计算机网络的优势，提高了系统的扩展性与利用率。%This paper introduces the design thought and implementation of Web-based underground pipeline graphics query system. The main character of this system is to adopt ActiveX control. On the basis of existing program, this technology could transfer some functions of existing GIS to new system, which is based on Web and has three-tier Client/Server (C/S) structure. The new system not only inherits advantages of traditional GIS, but also makes full use of computer network and improves the expansibility and utilization of the system.