网络化地理信息系统中数据传输技术的探讨

STUDY OF DATA TRANSFERS IN WEBGIS

在网络化的地理信息系统中，如何把用户提交的有关地理空间信息的请求和返回结果数据通过网络有效地进行传输，是影响系统性能的重要因素．通过分析网络化ＧＩＳ应用中存在的问题，并结合当前该领域的发展趋势，文中提出一种基于ＷｅｂＧＩＳ系统的网络数据传输技术，介绍了它的主要特点．

In the application of web based GIS, how to transfer efficiently the geospatial information, such as the users' spatial query submits and the result data from GIS database, through the network is a key factor to determine the capability of the system. The problems in the GIS applications and the current trends of GIS are discussed in the paper. Then a web based GIS data transfers technique and its characteristics are presented. The technique has already been used in some projects and has achieved a satisfactory result.