WebGIS development practices manual 1.2 network GIS

"Network GIS is a GIS product and application form in a certain period of time in the GIS development process. It can also be collectively referred to under all GIS systems" [1]. According to this definition, we can summarize all Internet-based distributed spatial information management systems into the concept of network GIS, network GIS provides multiple functions such as spatial data management, distributed collaborative jobs, network publishing, and geographic information application services.

Traditional GIS systems run on a single-host basis. Both software and data are deployed on a computer. The processing capability of software and hardware environments with high requirements depends on the configuration of the client, data cannot be operated and edited by multiple people, And the deployment cost is very high. However, network GIS makes full use of computers in the interconnected networks and enhances the ability to share and collaborate with each other to process geographic data. Compared with the stand-alone GIS system, network GIS has the following advantages:

Expand the application fields and service scope of GIS, so that more people can use GIS to obtain better spatial information services;

Ø transparent operation methods are provided for more users;

Reduce the cost of purchasing the GIS software system;

Enhanced the timeliness of spatial information services.

Although the most typical representative of Web GIS is WebGIS (B/S-based GIS, the C/S Mode GIS system, Web Service GIS, and mobile and Embedded GIS have added a wealth of content and forms for network GIS.

[1] Zhang shuliang, Li Xiumei, Jiang yongfa. 2005. Network Geographic Information System. Beijing: Science Press

Zhang penglin, Meng Ling-kui Shi-Wen. Principles and Technology of Network Geographic Information System. Beijing: Science Press 2005.3. p12-13