The Craig retroazimuthal map projection was created by James Ireland Craig in 1909. It is a cylindrical projection preserving the direction from any place to another, predetermined place while avoiding some of the bizarre distortion of the Hammer retroazimuthal projection. It is sometimes known as the Mecca projection because Craig, who had worked in Egypt as a cartographer, created it to help Muslims find their qibla. The projection is defined by:
given latitude, longitude relative to the fixed location, and latitude of the fixed location .
The above equation has a discontinuity at ; to resolve this, at 0° longitude, take, the ratio's continuous completion.
Famous quotes containing the words craig and/or projection:
“Is that the Craig Jurgesen that Teddy Roosevelt gave you?... And you used it at San Juan Hill defending liberty. Now you want to destroy it.”
—Laurence Stallings (1894–1968)
“In the case of our main stock of well-worn predicates, I submit that the judgment of projectibility has derived from the habitual projection, rather than the habitual projection from the judgment of projectibility. The reason why only the right predicates happen so luckily to have become well entrenched is just that the well entrenched predicates have thereby become the right ones.”
—Nelson Goodman (b. 1906)