When I plan a map I usually draw the layout from a birds-eye view on graphing paper. The problems with usuing this method is that I can only see the top which causes less detail and confuses me with similarly shapped objects. This method if frustrating and not very accurate at all. Does anyone know of any programs that can be used to preplan and lay out maps like a concept map? Thanks in advance. EDIT: Sorry guys I found one! Thanks anyway.
Sketchup is also incredibly easy to do 3d models in if you just want to draw something and not use sandbox.