| The geographical data is not only the blood of GIS application system,but also the key and the core of GIS application.GIS application itself deal with the geographical data by gathering,editing,storing,managing, analyzing,showing and mapping. Due to many GIS software platforms, complicated data structures, diferent and continuous developing models in GIS,and the cost of data construction taking a larger part in all of the cost,the study of data sharing is very important in GIS application. Realizing the transformation among some kinds of data is always an important problem in the development GIS application in recently many years.The article analyzes several common format of the spatial data .,and the coomparisoon was made with the vct format .In order to study the conversion between them to providle a conversion ideas.Vct format and shape format were analyzed emphatically. n this paper, making use of MO component technology under Visual C++ mixed-platform . In addition, studying on writing and realizing the transforming from shape file format into vct Data Formation program were also conducted.Finally, it presents its application and the conversion result.
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