1. A computer-based method for context preserving mapping of tubular structures represented by a three-dimensional (3D) dataset comprising: using a computer processor, processing the 3D dataset to project a skeleton of a 3D tubular structure on to a two-dimensional (2D) plane; using the computer processor, processing the projected skeleton to remove intersections and to untangle the skeleton, wherein the untangling comprises first searching for abutments, then searching for loops, and then searching for crossings; using the computer processor, determining a 3D boundary for a map of the tubular structure about the skeleton; and using the computer processor, mapping a 3D surface of the skeleton to match the 3D boundary to create a 3D map.