"What's the good of Mercator's North Poles and Equators, Tropics, Zones, and Meridian Lines?" So the Bellman would cry: and the crew would reply

"What's the good of Mercator's North Poles and Equators, Tropics, Zones, and Meridian Lines?" So the Bellman would cry: and the crew would reply "They are merely conventional signs! https://www.poetryfoundation.org/poems/43909/the-hunting-of-the-snark https://www.poetryfoundation.org/poems/43909/the-hunting-of-...