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I have a model that adds several fields, two which are manual inputs (County Name and User). I am manipulating several parcel layers (approx 90 counties).

In my model, one field takes the state and county ID's and (FIPS) calcs them together. The next field is a manual input of the county name (Which I enter). I want to write a if then statement in a calc value of this field from another feature.

Essentially in my parcel layer, I want the county name to automatically calculated based off the FIPS column in my parcel layer and in my county layer. So If FIPS = FIPS (From my county layer), then calc county name (in my parcel layer). Is this possible?

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  • I think you'll need to join the features to accomplish this.
    – recurvata
    Commented Jun 23, 2015 at 13:43
  • You don't say which version of ArcGIS, but it sounds like you could make use of the Join Field tool here (or Add Join, Calculate Field, Remove Join): desktop.arcgis.com/en/desktop/latest/tools/… Usually, I'd use cursors for this, but you said you needed a 'modelbuilder' solution.
    – T. Wayne Whitley
    Commented Jun 23, 2015 at 13:44
  • ArcMap 10.2.1, I guess I was over thinking this.
    – Zack
    Commented Jun 23, 2015 at 14:02

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There is a Help page called Using If-Then-Else logic for branching which I think you should review:

In ModelBuilder, if-then-else logic can be implemented by writing a script tool that tests some condition, then outputs two Boolean variables that describe the true and false condition and incorporating this script tool in a model. As an alternative to writing a script tool, you can also use the Calculate Value tool to test the condition and output a Boolean.

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