Domestic Resource Transport

Hi all, this might be a dumb question but something I have wondered about. In the current way things work, there a disadvantage to building RGOs way away from the capital (or where I have control) even before roads etc are built?

For example Say I want to build tools in the capital, but I can see that my production efficiency is low because of lack of copper and tin. If I build copper and tin RGOs but they are way far away in a rural region, does the game treat it the increase in supply and benefit to efficiency just as if that same RGO was in the capital or next door? Note: not concerned about tax.