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SIMODEL (Spatial Interaction Model) Excel Macro

SIMODEL (Spatial Interaction Model; Williams and Fotheringham 1984) is implemented in Excel Macro.
I have translated original SIMODEL which was developed by FORTRAN to Excel VBA and added some new features.

You can choose from Production constrained, Destination constrained, Doubly constrained and Competing Destination model.

Please look downloaded Excel file for input data format and other uses.

Download(250kB)
http://yabebeya.com/geocomputation/Simodel_English.xls

Screenshot SIMODEL

Reference
Williams, P. A. and Fotheringham, A. S.(1984): The calibration of spatial interaction models by maximum likelihood estimation with program SIMODEL. Geographic Monograph Series 7, Department of Geography, Indiana University

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