The test data has been referenced from healpix docs and ivoa documentation (for JSON MOC)
	* https://gamma-astro-data-formats.readthedocs.io/en/latest/skymaps/healpix/index.html
	* https://ivoa.net/documents/MOC/20191007/REC-MOC-1.1-20191007.pdf

 -- Nilesh Patra <npatra974@gmail.com>
