The Ogma library now includes a radial layout that position nodes around a selected one, based on their graph-theoretical distance. This layout is ideal to show connections between objects or between positions and keep the relationship lines from crossing other structures. Your end-users can use it for network analysis to sort out layers based on node distances.
The radial layout is highly customizable: distances are adjustable and you can control the circular distance between nodes in order to get an easy-to-read graph visualization. Read all about it in the Ogma documentation.