The Hobo-Dyer Projection (HDP) takes its place among important map projections. This new HDP map belongs to the family of Cylindrical Equal Area projections in which the latitude and longitude lines form a rectangular grid. Other projections in this family include the Lambert, Gall, Behrmann, Edwards and Peters. The HDP retains qualities of the other equal area cylindrical projections, but is more visually satisfying. Commissioned by ODT, Inc., created by British cartographer, Mick Dyer, the map was derived by modifying the 1910 Behrmann projection.
Behrmann placed the standard parallels at 30 degrees north and south. On the HDP map, the "cylinder" is assumed to wrap round the globe and cut through it at 37 ½ degrees north and south. In order to preserve the equal area property the shapes of the landmasses become progressively flattened towards the poles, but shapes between 45 degrees north and south are well preserved.