Blended Map Projections are Splendid Projections.

The homolosine projection, popular in atlases, was first described by Professor J.P.Goode in 1925. This projection uses a combination of the homolographic (Mollweide 1805) and the sinusoidal (variously attributed to Mercator, Sanson, or Flamsteed) projections. Goode's procedure was to use the sinusoidal projection, because of its supposedly superior properties, in the latitude interval from 40.93.degrees south to 40.7366 degrees north, and to use Mollweide's projection, from there as far as the poles, for a comparable reason. The particular latitude chosen is where the two projections coincide if the maps are laid on top of each other, or as Professor Goode states "have the same scale". The resulting pseudocylindrical projection has a discontinuity in the first derivatives at the join, and this can be seen by the user as a small kink in the curvature of the meridians. The kink can be avoided by blending the projections instead of just joining them. This blending is achieved by using a tapered weighted average of the two projections causing them t