Equal Earth context

Projection reference · Implementation · Sources · Stage 16J comparisons

Equal Earth is an uninterrupted equal-area pseudocylindrical world-map projection introduced by Bojan Šavrič, Tom Patterson, and Bernhard Jenny. It was designed to combine equal-area behavior with a familiar, legible global outline. The canonical method uses a Greenwich central meridian and is available in PROJ as +proj=eqearth.

Cartofreako uses Equal Earth in Stage 16J as an exploration-only comparison method. It does not replace or silently join the six standard atlas carrier families. This distinction matters: a method comparison, a centered variant, and participation in the #CorrectTheMap campaign are different claims. Implementing the equations establishes only the first.

Intended comparison roles

• Use canonical Equal Earth for global area-aware comparison against a Mercator control.
• Use an explicitly labeled central-meridian variant to test positioning and layout while holding the equations fixed.
• Use a WGS 84 geographic source preclip for a regional view; do not present the fitted panel as a new registered CRS.
• Compare it with AuthaGraph, Dymaxion, Myriahedral, or Cahill–Keyes only when data, dimensions, colors, labels, and extent remain controlled.

The Africa-centered Stage 16J variant uses 11.5°E. It is deliberately labeled a Cartofreako experiment and not EPSG:8857. A change of central meridian moves the interruption and positional emphasis; it does not change the Equal Earth equal-area method or prove a change in human interpretation.