Matrices describing affine transformation of the plane.
copied from cf-staging / affineconda install conda-forge::affineconda install conda-forge/label/affine_dev::affineconda install conda-forge/label/cf201901::affineconda install conda-forge/label/cf202003::affineconda install conda-forge/label/gcc7::affine
The Affine package is used to produce the affine transformation matrix.