Spherical Ruler 18inch

The Spherical Globe Ruler is designed to measure the length of great-circle arcs on an 18-inch globe in both degrees and centimeters. This hands-on educational tool helps students explore key concepts in spherical geometry and its real-world applications, including navigation, astronomy, geography, geology, seismology, oceanography, and ecology.

The product is white, allowing users to color and customize the markings as needed for specific lessons or activities.

Globes are sold separately. See related Focal Mechanism teaching kit which includes the ruler and other accessories.