Rig Veda mentions ships with 100 oars. The Buddhist Jataka stories wrote about large Indian ships carrying seven hundred people. History says that that Telugu King Samudra Gupta went around the world several times. The Harivamsa informs that the first geographical survey of the world was performed during the period of king Vaivasvata. The towns, villages and demarcation of agricultural land of that period were depicted on maps. Brahmanda Purana provides the best and the most detailed description of world map drawn on a flat surface using an accurate scale. Padma Purana says that world maps were prepared and maintained in book form and kept with care and safety in chests. Surya Siddhantha speaks about construction of wooden globe representing earth and marking of horizontal circles, equatorial circles and further divisions. Accidental finding of an old map some where can only open questions. Any continued knowledge must have many centuries of usage. Only India has it.