I used the custom territories to build a map of the Federal Highway Administration's (FHWA) Freight Analysis Framework data (FAF) using counties. However, the information containing which counties belong to which FAF region is separate from the information I am trying to display, which is the number of outbound or inbound tons from a specific region. Any ideas on how to get this to work?
You'll need on one side the data with the counties and FAF region in which you group the counties based on the FAF region field.
On the other you'll have the data with the FAF region and the outbound/inbound tons. you blend both sources on the FAF region field.