| The wide application of Geographical Information System (GIS) has improved the economic development rapidly. But most of the users need applied GIS adapted to certain work, not complex implemental GIS that can't be hold easily. So further development of GIS has become a new research field. According to the disadvantages of the current further development environment, this paper bring forward and implement GIS-Orienled interpret system, LK_YY language. First, we point out that LK_YY interpret system is realized in use of Object-Oriented system analysis and design. Then after introducing the grammar rule of LK_YY language, we introduce the data structure and algorithm to implement them in details. Among them, we first introduce the realization of basic language, then put emphasis on the translation of simple model object and the implementation of the two other basic features, inheritance and method overriding. Last, making use of LK_YY, we solve the maximum cost minimum flow problem in traffic program of GIS.
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