Prithvish NagDr. Prithvish Nag worked as Surveyor General of India from 2001 to 2005, and again in 2007 and 2008. He has also been the Director of the National Atlas & Thematic Mapping Organisation, Kolkata; UN Consultant in Cartography in Oman; and Vice-Chancellr of Mahatma Gandhi Kashi Vidyapith University. At present, he is the Director of the SHEPA Group of Educational Institutions, Varanasi, India. Read More Read Less