General

Useful for airline distances from a centre point of projection and for seismic and radio work.

Oblique aspect used for atlas maps of continents and world maps for radio and aviation use.

Polar aspect used for world maps, maps of polar hemispheres, and the UN emblem.

Directions

True only from the centre point of projection.

Distances

True only from the centre point of projection.

Correct between points along straight lines through the centre. Any straight line drawn through

the centre point is a great circle.

All other distances are incorrect.

Areas

Distortion increases away from the centre point.

Shapes

Distortion increases away from the centre point.

Type

Azimuthal.

Mathematically projected onto a plane tangent to any point on the globe. The polar aspect is

tangent only at a pole.

Note

Not directly supported. Maps must be transformed before being used.

(United States Geological Survey, n.d.)