"""
    Spatial Data Modeller for ESRI* ArcGIS 9.2
    Copyright 2007
    Gary L Raines, Reno, NV, USA: production and certification
    Don L Sawatzky, Spokane, WA, USA: Python software development
    
"""
# Create the Geoprocessor object
# Import system modules
import sys, string, os

#GP = win32com.client.Dispatch("esriGeoprocessing.GpDispatch.1")
import arcgisscripting
GP = arcgisscripting.create()

try:
    Evidence_Raster = GP.GetParameterAsText(0)
    #desc = GP.Describe(Evidence_Raster)
    #Evidence_Raster = desc.CatalogPath
    #GP.AddMessage(Evidence_Raster)
    MidPoint = GP.GetParameterAsText(1)
    #GP.AddMessage(Mean)
    Spread = GP.GetParameterAsText(2)
    #GP.AddMessage(Spread)
    Output_Raster = GP.GetParameterAsText(3)
    if Output_Raster == "":
        Output_Raster = Evidence_Raster + "_Small"
        GP.SetParameterAsText(3,Output_Raster)
    #GP.AddMessage(Output_Raster)
    
# Check out ArcGIS Spatial Analyst extension license
    GP.CheckOutExtension("Spatial")

# Process
    GP.OverwriteOutput = 1
    #1 / (1 + Pow(Float(Evidence_Raster) / MidPoint,Spread))
    InExpression = "1.0 / (1.0 + Pow(Float(" + Evidence_Raster + ") / " + MidPoint + ", " + Spread + "))"
    #GP.AddMessage(InExpression)
# Process: MapAlgebraStatement
    GP.SingleOutputMapAlgebra_sa(InExpression,Output_Raster,"#")
except:
    GP.AddError("Error in Execution" + GP.GetMessages())
GP.AddMessage("Exit Small Fuzzy.")