Geographic Information System Based on Internet

It is the GIS developing direction to integrate GIS with Internet. Internet GIS is not only used to publish distributed geographic information on line, but also to provide on line tools for distributed geographic information real-time analysis and processing. Internet GIS should make use of existing multi-sources and functions for geographic information analysis and processing. In other words, it must solve the problem of interoperability. The interoperability of Internet GIS includes heterogeneous data and heterogeneous geographic information processing environment. This paper presents approaches constructing Internet GIS which will be the tendency of the development of GIS technology.