help with minefields

[faceless]

hi,

i wanted to create a map with spezific minefields (ironminefield etc.) where different mines can be build on. how do i make it possible that an ironmine can only be build on an ironminefield ? for the minefields i have different models. i saw a map where buildings could just be placed beside a street. perhaps it could done in this way, but i have no idea how to make it.

thx