介绍了Ajax的基本原理和传统WebGIS的弊端。在当前的网络环境中,服务器负载过重导致了WebGIS服务性能的大大下降。针对此问题,提出了Ajax和WebGIS结合的新的Web体系框架。在该框架中,业务逻辑功能得到了有效的迁移,事实证明此框架有效地降低了服务器的负载,提高了客户端处理器的使用率,并具备了Ajax的优良特性。基于Ajax技术的WebGIS可能成为未来WebGIS发展的主流方向。
This paper introduces basic principles of Ajax and disadvantages of traditional WebGIS. Under the current network environment, server overload leads to great decline of WebGIS service performance. To solve the issue, a new framework combining Ajax and WebGIS is proposed. In this framework, business logic function can be transferred effectively, the framework has been proved to reduce the server overload effectively and improve the usage of the client processor, and it also possesses the excellent properties of Ajax. WebGIS based on Ajax technology might become the mainstream of the development of WebGIS in the future.