11. The exact type of distortions depends on the map projection used. 12. The study of map projections is the characterization of these distortions. 13. The Swiss mathematician Johann Lambert invented several hemispheric map projections . 14. Miraikan adopted a unique map projection called Authagraph as its official world mapping tool. 15. He taught courses on map projection at George Mason University. 16. In map projections , the term sphere carries the same meaning as the vernacular: 17. The "'van der Grinten projection "'is a compromise map projection that is neither conformal. 18. The most commonly used Map projection is that of Eckert ( the Pseudo-cylindrical projection ). 19. The "'Eckert IV projection "'is an pseudocylindrical map projection . 20. The "'Sinusoidal projection "'is a pseudocylindrical equal-area map projection .
