Geometry::AffineTransform instances represent 2D affine transformations that map 2D coordinates to other 2D coordinates. See the POD documentation for details. The references in the SEE ALSO section provide background information about affine transformations. The module includes an RPM .spec file to build installation packages for RPM based Linux distributions. You should be able to build the RPM directly from the tar.gz distribution archive file with this command: rpmbuild -ta Geometry-AffineTransform-x.y.tar.gz