  The analysis of spatial observations on a sphere is important in areas such
as geosciences, physics and embryo research, just to name a few. The purpose of
the package rcosmo is to conduct efficient information processing,
visualisation, manipulation and spatial statistical analysis of Cosmic
Microwave Background (CMB) radiation and other spherical data. The package was
developed for spherical data stored in the Hierarchical Equal Area isoLatitude
Pixelation (Healpix) representation. rcosmo has more than 100 different
functions. Most of them initially were developed for CMB, but also can be used
for other spherical data as rcosmo contains tools for transforming spherical
data in cartesian and geographic coordinates into the HEALPix representation.
We give a general description of the package and illustrate some important
functionalities and benchmarks.
