Being a former computer programmer and accountant I have always suspected such. A map is not exact, but it is the best and most complete afordable information that we have. It is only information and information generates very little revenue on it own. As far as ROI, that information is only worth what you are able to do with it.
Some farmers can make far more profitable decisions with that information.
Others can not. It is called management abilities. I hope this does not sound like I am putting any one down. I do not mean it that way.