SCS Maharashtra Board
Grade 6 | Geography | Chapter 3 - World of Coordinates
Knowledge of ancient Indian astronomers about latitudes and longitudes.
Ans.
(1) The ancient Indian astronomers had the knowledge about latitudes and longitudes. Before the world accepted 0° longitude as the Greenwich Mean Longitude, the Indian astronomers had decided on a base longitude.
(2) This base longitude passed through the city of Ujjain. Hence this base longitude was known Ujjaini base latitude. There is a reference of the ancient Indian Time measuring System based on this Ujjaini longitude in the ancient astronomical texts.