A hierarchy of maps can be built by using group maps. A group symbol on a map represents a sub-map that can contain again all types of symbols. Double clicking a group symbol opens up the group map in an additional window. In this way a large network can be structured and the elements on a map can be limited to a reasonable number. Such a map structure could start at a national level containing only group symbols of the regions, continuing with groups showing cities and finally NEs.

There is no practical limitation to the number of levels that can be defined, or to the number and type of symbols used on each level.

It is possible to define several maps for the same network according to topology, application, NE type, or any other criteria. Any NE can be placed in more than one map.