I've extracted values from a raster to a point file, but now I need a field with the text information from the raster attribute table that corresponds with the value. I've been trying to use the field calculator to do an if/then type function, but I can't get it to work;enter image description here Basically, where it says 1201 in the RASTERVALU field I want it to say "Developed, Open Space" in the CN_LEVEL3 Field. I have absolutely no experience with Python.

4 Answers 4


In your field calculator, select Python as your parser. In your code block:

def calcVal (inVal):
 if inVal == 1201:
   return "Developed, Open Space"

Then in your field calculation box:


Tweak as needed. Look into if/elif/else statements for a bit more complex logics.


To expand on the other answers:

If you will be defining other values from RASTERVALU, besides the 1201, to CN_LEVEL3 you can put a dictionary into the codeblock. Example (I made some random values):

def calcVal(inVal):
    values = {1201: "Developed, Open Space",
              1202: "Forest",
              1203: "Water"}
    if inVal in values.keys():
        return values[inVal]


Python dictionary

Field calculator examples; 10.2


For a quick solution instead of using an if/than you could do a select by attribute then calculate the field on the selected records like this:

enter image description here

enter image description here

enter image description here

This is a quick approach if you only have to run this for one value however gm70560's answer is far superior if this has to be repeated for multiple values.

  • When I tried this method, instead of "Developed, Open Space" populating the field CN_LEVEl3 where RASTERVALU equal 1201 it populated CN_LEVEL3 with either -1 or 0
    – Trose3
    Jan 26, 2015 at 13:27
  • is CN_LEVEL3 set as a text field Jan 26, 2015 at 13:30
  • I got it! Something stupid and simple as usual. Since field CN-LEVLE3 was already indicated as the field where the calculation was being performed I did not need to add it to the codeblock. Thanks!
    – Trose3
    Jan 26, 2015 at 13:40
  • happy to help out. Jan 26, 2015 at 13:44

To avoid the need to use Python you can use Select By Attribute first. This is available as a tool, from the Selection pulldown or from Table Options. Then use Field Calculator or the Calculate Field tool to update just those features with the desired value.

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