xMin = arcpy.GetParameterAsText(0) if xMin == '#' or not xMin: xMin = "4357197" # provide a default value if unspecified yMin = arcpy.GetParameterAsText(1) if yMin == '#' or not yMin: yMin = "1414133" # provide a default value if unspecified xMax = arcpy.GetParameterAsText(2) if xMax == '#' or not xMax: xMax = "4357210" # provide a default value if unspecified yMax = arcpy.GetParameterAsText(3) if yMax == '#' or not yMax: yMax = "1414160" # provide a default value if unspecified