# Package org.apache.commons.math3.geometry.spherical.twod

This package provides basic geometry components on the 2-sphere.

See: Description

- Class Summary
  Class | Description
  --- | ---
  Circle | This class represents an oriented great circle on the 2-sphere.
  Edge | Spherical polygons boundary edge.
  S2Point | This class represents a point on the 2-sphere.
  Sphere2D | This class implements a two-dimensional sphere (i.e.
  SphericalPolygonsSet | This class represents a region on the 2-sphere: a set of spherical polygons.
  SubCircle | This class represents a sub-hyperplane for `Circle`.
  Vertex | Spherical polygons boundary vertex.

## Package org.apache.commons.math3.geometry.spherical.twod Description

This package provides basic geometry components on the 2-sphere.

We use here the topologists definition of the 2-sphere (see Sphere on MathWorld), i.e. the 2-sphere is the two-dimensional surface defined in 3D as x2+y2+z2=1.

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