For observers at moderate latitudes, who can see the sky near the celestial pole of their hemisphere better than that nearer the horizon, this may be a good reason to prefer a planisphere made with the polar azimuthal equidistant projection method.
12.
The "'azimuthal equidistant projection "'is an flag of the United Nations, for the USGS " National Atlas of the United States of America ", and for large-scale mapping of Micronesia, among others.
13.
The map of Piri Reis perfectly fits an azimuthal equidistant projection of the world centered in Cairo, and some believe it's also the oldest surviving map of Antarctica, despite being drawn more than three centuries before the official discovery of that continent.
14.
Web-accessible articles that deal further with the concept of the MBR include " Unlocking the Mysteries of the Bounding Box " by Douglas R . Caldwell, and " Geographic Database Search Interfaces and the Equatorial Cylindrical Equidistant Projection " by Ross S . Swick and Kenneth W . Knowles.
15.
The "'Aitoff projection "'is a modified azimuthal map projection first proposed by David A . Aitoff in 1889 . Based on the equatorial form of the azimuthal equidistant projection, Aitoff halved longitudes from the central meridian, projected by the azimuthal equidistant, and then stretched the result horizontally into a 2 : 1 ellipse.
16.
For the two-point equidistant projection, my guess is that one way it can be constructed pointwise is by plotting the two control points A and B a distance 1 apart on paper, measuring the distance AB between them on the globe, and then measuring distances between those two points and some other point C on a globe.
