3D coordinate system cylindrical coordinate system Philippe Rocca-Serra Alejandra Gonzalez-Beltran Orlaith Burke A cylindrical coordinate system is a three-dimensional coordinate system that specifies point positions by the distance from a chosen reference axis, the direction from the axis relative to a chosen reference direction, and the distance from a chosen reference plane perpendicular to the axis. The latter distance is given as a positive or negative number depending on which side of the reference plane faces the point. https://en.wikipedia.org/wiki/Cylindrical_coordinate_system metadata incomplete