Projection lab

Gall-Peters projection: interactive map

Atlas of error · liveGall-PetersClick or tap a country to add its outline

Click a country on the map to add its outline.Tap a country on the map to add its outline.

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Gall-Peters projection at a glance

Distortion class: Equal-area
Graticule type: Cylindrical
Creator: James Gall / Arno Peters
Year: 1855 / 1973
Area: Preserved (equal-area projection)
Shape: Severely distorted: stretched north to south between the 45° parallels and east to west beyond them, toward the poles
Distances: Distorted; scale is true only along the 45° N and S standard parallels
Angles and directions: Distorted (not conformal)

Add countries from the tools panel and drag them to other latitudes. The outline keeps its true shape and area on the globe, so any change in its size on the map shows this projection's distortion. Tissot's indicatrices and the area distortion map show the same effect across the whole world.

Full guide: Gall-Peters projection →Compare with another projection →Quiz: name the projection →