Epic sweep

Well the home land may not given such overwhelming support to Mani but its sure as mentioned in our Hindi review of the ‘Raavan' that the movie is for the connoisseurs of ‘quality' cinema and the team should be happy that a film based on the most popular Indian epic ‘Ramayana' is getting immense praise from the west. A rare achievement which underlines the fact that you don't have to visit Korea or Iran or America to churn a quality cinema.
The Hollywood reporter has termed it as a ‘Pan-Indian saga with epic sweep, intense emotion and gorgeous images.'
East or west Mani Ratnam is the Best, we are proud of you Mani Sir.

Please explain to me what "epic sweep" means here.

Source : http://www.indiaglitz.com/channels/hindi/article/57977.html