Orrery

At its simplest, a rough model showing the relative locations of landmasses in the Island Ring. Small trading outposts may only have a few components to make a partial map of their nearest neighbors, occupying as little space as a carving board. The largest cities have orreries the size of an airship, permanently installed near their harbors, which not only provide calculations for navigation but even move, to track the motions of the islands orbiting Sola. Gnomes take particular pride in building these and compete fiercely for commissions to build them.