[GIS] Using the Field Calculator in a Domain field

arcgis-10.0attribute-tabledomainsfield-calculator

I have a coded domain field with 10 dropdown options. Possible choices include integers and text.

I need to change a selection of 250 features (which have differing values) to the same value. This value is one of the dropdown values.

When I use the field calculator (field="value") I get an error. The calculated value is invalid…..

Anyone know how to change multiple values within a coded domain field?

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Best Answer

It will depend somewhat on the type of field and domain you are using.
Assuming you are using the defaults, integer, and coded value.
you want the syntax in the field calculator to be (selectedrowsinmydomainfield) = newcodedvalue in the example...

nom_size is the domain with 1 = 1"
If I want to change all selected values to 1".
I use the syntax in the middle ( [nom_size] = 1
If you are using text field with a text domain.

EDIT:
Ok since you are using a text domain and your codes all match your descriptions.
If you want to change all selected rows to be BETH.
[ZONE_] = "BETH"

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It sounds like you need to get the coded value for Metre and calculate that coded value into the field, is that correct?

I've handled this with a dictionary before, but I created the coded-value domain myself with a dictionary (timezones below), so I already know the key: value pairs. So the trick is to, for a given value in the dict, get the key:

def get_timezone_key(timezone_val):
    """Get key value for a given timezone text value"""
    timezones = {1: "US/Alaska", 2: "US/Central", 3: "US/Eastern",
                 4: "US/Hawaii", 5: "US/Pacific"}
    # Get the subtype code from dict based on input def timezone user selected
    timezone_key = timezones.keys()[timezones.values().index(timezone_val)]
    return timezone_key

print get_timezone_key("US/Central") # gives 2

Please clarify if this is not what you are needing to accomplish.

Best Answer

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