3-D-Printed Lampshades Project Mesmerizing Patterns Using Ancient Cartography Methods

Ptolemy would be proud. Stereographic projection is a mapping technique that allows a spherical object to project a pattern onto a 2-D surface. Mathematical concepts and physical models of stereographic projection have been around since ancient Greece, when Ptolemy and others used it to visualize their maps of the stars. Later on, cartographers used the method to map the Earth. Read Full Story