"gis Laboratory Without Walls" Construction

The tide of information is swift and violent lashing each of the fields of manufacture and lives of our society, indicating the beginning of a completely new information society and space times. Especially after the "Nation Information Infrastructure" and "National Spatia] Data Infrastructure" plans were put into effect in the 90's in the U.S, Al. Gore-the former vice president of U.S. A put forward the strategic idea of establishing "Digital Earth" in 1998. People have fully known the important position and the effect of geographic information and geographic information technologies in the coming society.Essentially the "Digital Earth" is an incomparably huge and very complicated GIS. Based on this, we can approximately think the "collaboratory" as a GIS laboratory without walls. Based on the analysis of research achievements of currently available "Digital Earth", the paper expounds the connotation of the "GIS laboratory without walls", and points out that the establishment of the WebGIS based on the service is the key to the construction of the "GIS laboratory without walls". After comparing the construction technology of the WebGIS, the paper make a conclusion that the technology based on the COM/DCOM and Java is the trunk stream technology of construction of the WebGIS. Then the paper discusses the realization method based on the XML, towards service. Finally, the paper discusses the field .and the application layer of the "GIS laboratory without walls", and then combines with the demonstration engineering to explain the feasibility of construction and application of the "GIS laboratory without walls", and also points out the difficulty of construction of the "GIS laboratory without walls" on currently availabletechnological foundation.