The Design And Application Of GIS Human-Computer Dialogue Pattern Based On Extended Finite State Machine Model

Geographical Information System (GIS) and its technologies have already been widely used in many fields, such as science, commerce, planning and decision-making, and they have been a very useful tool in people's production and life. GIS has been greatly improved since its appearance till right now. but its application potential has not brought into full play yet. That is because if users want to operate GIS application program skillfully. they should understand the architecture, function and interface of the system in the first place. which is very hard to common people. In addition, in mobile GIS. the traditional input/output methods. such as keyboard and touch screen, cannot meet the demand of quick response in fast movement due to the restriction of screen size of the mobile device. However, as the core of human speech. natural language has been considered as one the most habitual and effective ways to communicate with each other. With the flexible. convenient and fast characteristics, natural language also can be applied in the human-computer interaction in GIS. and it will help to develop GIS more intelligent.In order to implement the interaction between GIS and users with natural language, this paper has reviewed the previous work on GIS human and computer dialogue system, finite state machine and its application in human and computer dialogue. and some of the existing research findings in the field of human-computer dialogue can be used for reference. According to the characteristic of spatial information field, this paper has lunched the research on GIS human-computer dialogue based on extended finite state machine (EFSM) theory. Firstly, this paper has discussed three interaction modes and put forward a representation method from natural language to computer language based on tagging dual attributes (ontological attribute and generalized attribute) of characteristic words in GIS, which has solved the problem of the formal expression of natural language. Secondly, the patterns in GIS human-computer dialogue based on EFSM have been designed, including designing the state machine's states, events and behaviors, establishing the relationship between state transition in state machine and dialog procedure in human-computer interaction, and building the framework of GIS human-computer dialogue, which has solved the problem of modeling EFSM. Thirdly, this paper has overcome key technological difficulties in GIS human-computer dialogue based on EFSM. In addition, feedback mode has been used in GIS human-computer dialogue to solve the problem of failed operation due to uncertainty of user inputs by which the fluency of speech interaction and stability can be ensured. Finally, a voice mobile GIS prototype system based on EFSM has been implemented. and application examples of data collection. map browsing, information query and navigation have been studied.