Eckert II projection

In the equatorial aspect (where the equator is shown as the horizontal axis) the network of longitude and latitude lines consists solely of straight lines, and the outer boundary has the distinctive shape of an elongated hexagon.

It was first described by Max Eckert in 1906 as one of a series of three pairs of pseudocylindrical projections.

Within each pair, the meridians have the same shape, and the odd-numbered projection has equally spaced parallels, whereas the even-numbered projection has parallels spaced to preserve area.

As a pseudocylindric projection, spacing of meridians along any given parallel is constant.

The projection has correct scale only on the central meridian at latitudes 55°10′ north and south.