Distances from North Korea

An azimuthal equidistant projection of distances from North Korea (up to 120°).

BBC News has been illustrating North Korean missile ranges using an orthographic projection centred at North Korea, as reproduced below.

Unfortunately, this is slightly misleading, as distances measured relative to the centre are not preserved under this projection, particularly near the edges.

An orthographic projection of distances from North Korea.

Furthermore, the orthographic projection is limited to a single hemisphere at a time, and so much of the U.S. mainland is not shown, despite it being of interest to the story.

The first map shown above uses an azimuthal equidistant projection, which preserves distances from the centre and is not restricted to a hemisphere.

See also: azimuth and distance from London.