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The additive model[1] then combines the factors as defined in part (3) of the equation below, and generates the raster suitability map.
The standardization procedure is taken from : http://support.esri.com/cn/knowledgebase/techarticles/detail/30961
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- number of desired new facilities.[1] Eastman R. (1999) Multi-criteria evaluation and GIS. Chapter 35 In: Longley PA, Goodchild MF, Maguire DJ, Rhind DW (eds) Geographical information systems, Wiley, New York. pp493-502.