3D Maps That show blocks and elevation

So you make 2 maps, go to the bottom of where you want to see everything (in 32x32 or 64x64 because 128x128 would be to big) and make on map there, then go to the top of where you want it, by building up then you link the 2 maps together to make one placeable block or have a a glass block that you place the bottom map into and the top map which then makes a holographic design of the maps