In this paper, Agent based architecture has been introduced into GIS for interactability and scalability. The authors have developed an interface agent to interactively assist the user with the query formation process. The interface agent has a capability of offering domain knowledge that is associated with a given query. Also the agent records user s troubleshooting experience and shows it to the same user and other user as hints. Further, the authors also have developed the Agent based architecture with a 2-tier mediator model in GIS to meet the meeds for interoperability among diverse application domains and integration of heterogeneous informa-tion source.The broker agent provides a matchmaking service to other agent,As a result,qualitative and quan-titative data can be integrated into GIS.Finally a prototype system-GXGIS,using agent-based technology is described.