I'm building a model (ModelBuilder) at ArcMap 10.3.1. How can I get an output (can be a string) of the maximum and the minimum value of a raster to use it on raster calculator?

Actually I'm using the Get Raster Properties tool, and the result I'm putting on raster calculator like this:

-> Square("%raster%" - "%raster_max%"/"%raster_max%" - "%raster_min%")

My problem is that the Get Raster Properties does not export a string with the value. I would like to know if there is a tool or a way using ModelBuilder to extract to Max and Min value of a raster to directly apply on Raster Calculator.

edit: I tried to use Calculate Value tool, with the code:

import arcpy
#Get the geoprocessing result object
maxValueResult = arcpy.GetRasterProperties_management("c:.../..", "MAXIMUM")
#Get the MAX value from geoprocessing result object
maxValue = maxValueResult.getOutput(0)

But it keeps exporting the number only in the results, and it does not convert into a string to use on raster calculator.

2 Answers 2


Assuming the raster has already had statistics calculated, you can access the max and min values in the raster calculator directly using "your_raster".maximum and "your_raster".minimum syntax. See this answer for more details.


Below is a silly model that gets the MAXIMUM value of a raster and then adds it to itself then takes the square:

Using maximum value

There is no need to convert the output of the properties tool into a string.

  • Thank you very much for the answer. Already tried that: Square("%NDVI%" + float(%maxvalue%)) I think the problem is that the number have a negative or positive signal. Error: Square(Raster(r"C:\...") + float(0,586451292037964)) ERROR 000539: Error running expression: rcexec() Traceback (most recent call last): File "<expression>", line 1, in <module> File "<string>", line 5, in rcexec TypeError: float() takes at most 1 argument (2 given) Failed to execute (Pv Calculator)
    – Apatons
    Commented Jan 14, 2017 at 16:56

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