Azimuthal Equidistant Maps

http://www.colorado.edu/geography/gcraft/notes/mapproj/mapproj.html

This map displays a polar azimuthal projection. It is sometimes used for mapping routes for air travel. Measuring the distance from the center will be true distance. As you move away from the center, the distance increasingly distorts. All the point on the map is going in the true direction. The meridian lines are straight and the parallels are varying sized circles space out equally. This map is best used for displaying polar locations. This  map demonstrates the north pole. This map is for definition purposes to help introduce the concept of an Azimuthal map projection.