21. This is Wikipedia's one and only map projection page, and it is mathematical in content. 22. C . The definition prevalent in the map projection literature, which is what I advocate. 23. He created the only conformal retroazimuthal map projection , which is known as the Littrow projection. 24. The "'sinusoidal projection "'is a pseudocylindrical equal-area map projection . 25. Every distinct map projection distorts in a distinct way. 26. The county has the unusual distinction of forming a perfect square by Mercator map projection . 27. That literature is the authority for map projections . 28. In 1963, Robinson devised his own map projection . 29. In cartography, several named map projections , including the Mercator projection and the stereographic projection are conformal. 30. The page is mostly about " warping " images to properly overlay with different map projections .