Family metro maps

We present family metro maps as a new approach to visualize the relations between multiple related families. A is represented by line, where parents are end nodes and children intermediate nodes. introduce trees rooted binary consider problem of automatically drawing map for given tree without crossing line segments, successive placed at equal distances. The inter-node distance may be chosen depend on generation family, such that lines earlier generations shown more prominently than later generations. Family can used descendants couples have common descendants.