They are - That map is largely useless. Only in provinces that exist at gamestart are goods pre-defined. Everywhere else the game uses a table and rolls a result - even for the Portoguese and Castillean colonies off of Europe.
It would still allow you to keep track of the already formed colonies and their trade goods. It's better than being competely in the dark and having to check manually time after time if the resources for all new colonies are already known and if they are naval supplies or not.