Logic of the plan partion of Vajsablova map:

It is very simple. Indivual layers around whole black cave contour are just previews below with offsets (and color preview-below 0).

To show interconnections between layers itself and individual layers to the cave contour is a little bit more difficult.

I used very simple scraps contained just one "double point":

scrap plan_1-6 -projection plan -scale [-128 -1989 1689 -1989 0.0 0.0 46.1518 0.0 m]
  point 0.0 0.0 station -name 1.6@vajsablova -subtype fixed
  point 0.0 0.0 map-connection
endscrap

Then I created maps for each of them:

map plan_con_1-6
  plan_1-6
endmap

The I created maps for showing interconnections between layers (example for two maps):

map plan_con_1-6_1-6
  plan_con_1-6
  plan_con_1-6 [12.5 0 m] none
endmap

map plan_con_2-1_2-1
  plan_con_2-1
  plan_con_2-1 [0 15 m] none
endmap

And finally I created whole map with "just interconnections maps" on the top and individual layers (with the same offsets ofcourse):

map plan
  plan_con_1-0 [0 17.5 m] none
  plan_con_1-6_1-6 [-12.5 17.5 m] none
  plan_con_2-1_2-1 [-12.5 2.5 m] none
  plan_con_2-11_2-11 [-12.5 -10 m] none
  plan_con_2-13_2-13 [-12.5 -25 m] none
  plan_con_2-17_2-17 [-12.5 -45 m] none
  plan_stara [0 17.5 m] below
  plan_prezident [-12.5 17.5 m] below
  plan_pod-prezidentom [-12.5 2.5 m] below
  plan_podavania [-12.5 -10 m] below
  plan_zabudnuta [-12.5 -25 m] below
  plan_zabia_vytrvalost_170 [-12.5 -45 m] below
endmap

The first point is different, because it has not interconnecton to the other (higher) level but just to the cave contour...

The offsets used for showing interconnections between layers are manualy computed as diferences between layers to the contour ofsetts:

map plan_con_1-6_1-6
  plan_con_1-6
  plan_con_1-6 [Ax-Bx Ay-By m] none
endmap

map plan_con_2-1_2-1
  plan_con_2-1
  plan_con_2-1 [Bx-Cx By-Cy m] none
endmap

map plan
  plan_con_1-0 [Ax Ay m] none
  plan_con_1-6_1-6 [Bx By m] none
  plan_con_2-1_2-1 [Cx Cy m] none
  ...

Yes it is posible to do it different ways, but this by this way you can see part of survey line pointing to stations which are not on the partial maps also...