Model Builder - Using Only Certain Fields

Question

I have to use ModelBuilder in ArcGIS 10.1 to create a mix of two tools: buffer and select by location. However, I'm supposed to let the user only enter certain information, and have other fields be assumed. For example, I only want the user to fill in the first three fields, and have the Side Type, End Type, and Dissolve Type be the same values all the time: enter image description here

How would I go about doing this is ModelBuilder?

Answer 1

In model builder, you can set variables from a tool's parameter. In model builder, right click the tool, go to 'Make Variable', and click 'From Parameter'. Then you can set that variable to be a 'Model Parameter', which means the user will specify that variable. The other things will stay as you set them for the tool in model builder.

Answer 2

I believe you can set predetermined variables as values for the input parameters.

If you right click on the Buffer tool in Model Builder, and go to Make Variable --> From Parameter --> And then select the parameters which you want the user to set a value for

enter image description here

Then set the default values in the Buffer tool properties that should stay constant (Side Type, End Type, and Dissolve Type)

EDIT

Here's some documentation.