HCI is an important factor for the decision support capacity and efficiency of operation command and decision support system. By analysis of the characteristics of humancomputer interaction in the process of operation command and decision support, this paper studies the present new features of the natural humancomputer interaction technology represented by penbased user interface. Based on the present GIS system, it builds up a dynamic loading model of multichannel interaction in order to improve the efficiency of humancomputer interaction and the interacting ability of operation command and decision support system with penbased interaction, multitouch and video media as the multichannel interactive modes.

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