2D features All map data bond relative to survey points. You don't need to re-edit the whole map after any dramatic loop closure. Therion is designed to process all kinds of cave maps with no limitations. Following maps of the same cave show some of its features. First two maps show the cave map drawn using two different symbol packages.
Third map includes limestone in the background.
You can see here a power of MetaPost that enables limestone texture to fit a stratigraphic surveys. Bigger maps can be divided into several pages to form a cave atlas. Model can include also geology, hydrology or any other data of your interest. On the first picture you can see a 3D view to a complicated 18 km cave system under transparent surface with topographical map texture. Blue tectonic faults are added on the second picture, and map texture is replaced by surface geology.