The Spherical Atlas is a treasure in Pikmin 2. It is a northern hemisphere of a globe; this being a representation of Earth suggests that the Pikmin planet is Earth. This heavy treasure is found on the last sublevel (2) of the Emergence Cave in the Valley of Repose. It requires at least one Purple Pikmin on it to lift it, as it weighs 101 units, more than 100, the maximum weight one hundred weaker Pikmin can carry. This is also the first cave Purple Pikmin are found in, on the same sublevel as the treasure. Before carrying the treasure, it is recommended to defeat the Snow Bulborbs nearby.
When this treasure has been retrieved, the Sphere Chart, part of the Exploration Kit, is unlocked, granting access to the Awakening Wood. This is made possible through the coordinates it provides the Hocotate ship. The Geographic Projection is also a globe half, this time a southern hemisphere; and it too unlocks a new area, the Perplexing Pool.