“Sphere to Tangential Plane”: Polar (Normal) Aspect - Map Projections: Cartographic Information Systems - page 222

Fig. 5.25. Special perspective mapping: the Lagrange projection: the left chart. Together with the right chart,
a minimal atlas of the sphere is constituted
Fig. 5.26. Special perspective mapping: the Lagrange projection: the right chart. Together with the left chart,
a minimal atlas of the sphere is constituted