Dancing Hoskuld
Deity
What about a spy and the ability to steel a resource four 5-10 turns
That is one of the things in Sevo's Faces of God mod I would like to implement. The rogue builds a depot in your home territory and then goes and sits on the enemy resource transferring it to the depot plot until the rogue is removed or the depot is destroyed.
That is the problem with the players mentality.
If they want to go for early advantage, they build these new farms and destroy the chance of finding more useful resources.
Else, it is neither realistic nor good for Ai.
In terms of gameplay, human players will definitely exploit it as a hidden treasure radar to decide good city location.
Realistic wise, it is stupid that something you cannot see decide whether you can do something
1) can only place resources inside your territory so can only find hidden resources in your territory so it is of limited use for placing cities.
2) realistically you don't destroy most mineral resources by planting on the surface. Same for animals. It is just the way civ works by having everything on the surface.