underground maps

I love using maps, but i wish i could create one for my mines. If there was an "above ground" and "below ground" option that would be great. One that would show tunnels that ive explored, so it would have to be on a much smaller scale that the current maps. Another option would be to have a map that shows the y axis. It would show the depth of the explored world, from mountain tops to bedrock in a certain area. Either of these could be helpful to prevent getting lost in caves.