Iteration using ModelBuilder

[FelekeAsrat]

I just want to select a tool that will go through all the counties in the dataset and clip one of three available feature layers(water bodies, stream or city limits).  Finally, the tool will create output that uses variable substitution to name the final output.  Plus, I want to use preconditions.  How do I design the model using ModelBuilder?Darren Wiens​

[DarrenWiens2]

I don't use Model Builder much, but I'd look into Iterate Feature Selection.

[ChrisDonohue__GISP]

Here's some pieces of the puzzle:

To loop through the data, use an iterator

ArcGIS Desktop

In-line Variable Substitution:

ArcGIS Help 10.1

Chris Donohue, GISP

[FreddieGibson]

Have you tried creating a model without the iterator logic? If you were to show a screenshot of a working model without the Iterator or provide a detailed descriptions of the tools you're using to manually accomplish this workflow we'd be better able to assist you with question.