How do I use the Surface Volume tool in ArcMap via Model Builder, without using Python, to process a set of multiple float values in a loop, since an iterator takes integers when I implement a for loop?

See the attached image as indication.

enter image description here


3 Answers 3


An alternative method is to create a table and store your floats in that, 1 row per float value. Then use the Iterate Field Value iterator to drive your model. But I think @user2856 has the simplest solution.

  • the issue in here is that for both options, iterate multivalue and iterate field value it is not possible connect it to the so called "plane height" - which is the field of the tool i'd like apply multiple values to
    – Olli
    Jul 21, 2020 at 15:09
  • 1
    Try parsing the output of the iterator into a Double using the Calculate Value tool, then feed that into the volume tool
    – Hornbydd
    Jul 21, 2020 at 18:59
  • Thanks, thats exactly what I was looking for! :)
    – Olli
    Jul 22, 2020 at 7:45

You can use the Iterate Multivalue tool and add a list of floats:

enter image description here


Here is the code to loop the surface volume tool. You can hard-code the paths and run this in your favourite IDE. Or un-comment the arcpy.GetParameter....stuff and turn this into a Toolbox Tool.

import sys, arcpy, traceback

arcpy.AddMessage( "Multi-Volumes for ArcGIS 10")
arcpy.AddMessage("Loop the 3D Analyist Surface Volume tools for a range of values...")

def GetValues(themessage, x):
    thevaluesatx = str(x)
    themessage = themessage.split("\n")
    thevalues = themessage[2].split("  ")
    for item in thevalues:
        thevalue = item.split("=")
        thevalue = thevalue[-1]
        thevaluesatx = thevaluesatx + "," + str(thevalue)
    thevaluesatx = thevaluesatx +"\n"
    return thevaluesatx

My_txt = r"F:\FerndaleDirtPile20190729\ferndaledirtpipe20190729demUTMvolumes.csv"
My_surface= r"F:\FerndaleDirtPile20190729\ferndaledirtpipe20190729demUTM.tif"
direction = "ABOVE"
startingplane = 4
endingplane = 10.4
z = 1
graduations = 0.25

#My_surface= arcpy.GetParameterAsText(0)
#My_txt = arcpy.GetParameterAsText(1)
#direction = arcpy.GetParameterAsText(2)
#startingplane = float(arcpy.GetParameterAsText(3))
#z = float(arcpy.GetParameterAsText(4))
#graduations = float(arcpy.GetParameterAsText(5))
#endingplane = float(arcpy.GetParameterAsText(6))

direction  = direction.upper()
f = open(My_txt,'a')
f.writelines(r"elevation, 2d_area, 3d_area, volume" + "\n")

arcpy.AddMessage("Please wait, this script is processing...")

if direction == "BELOW":
    arcpy.AddMessage("startingplane = " +str(startingplane))
    arcpy.AddMessage("endingplane = " +str(endingplane))
    while startingplane > endingplane:
        arcpy.AddMessage("Getting Results...")
        result = arcpy.SurfaceVolume_3d(My_surface, "", direction, startingplane)
        thevaluesatx = GetValues(result.getMessages(0), startingplane)
        startingplane = startingplane - graduations

if direction == "ABOVE":
    arcpy.AddMessage("Executing above...")
    x = startingplane
    while startingplane < endingplane:
        result = arcpy.SurfaceVolume_3d(My_surface, "", direction, startingplane, z)
        thevaluesatx = GetValues(result.getMessages(0), startingplane)
        print thevaluesatx
        startingplane = startingplane + graduations


arcpy.AddMessage("Finished without errors!")

except arcpy.ExecuteError: 
    msgs = arcpy.GetMessages(2) 
    #If the error is with the script, or with python, find error and report it to the screen...
    tb = sys.exc_info()[2]
    tbinfo = traceback.format_tb(tb)[0]
    pymsg = "PYTHON ERRORS:\nTraceback info:\n" + tbinfo + "\nError Info:\n" + str(sys.exc_info()[1])
    msgs = "ArcPy ERRORS:\n" + arcpy.GetMessages(2) + "\n"
  • The question specifically states "without using Python".
    – user2856
    Jul 20, 2020 at 3:16

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