Web Service encapsulation of fortran-based geographical model

This paper take the hydrological model SWAT as an example, explores the encapsulation technology which encapsulate a Fortran source code into a Web Service. In the geographical models, there are a great many of global variable parameters and file reading parameters, according to this situation, we put out a method which makes use of XML file to transform data and file pointer parameters. The encapsulation method is the basis of constructing the model library in the distributed geographical model environment.