2012 Canadian federal electoral redistribution
The federal electoral redistribution of 2012 was a redistribution of electoral districts (also known as ridings in Canadian English) in Canada following the results of the 2011 Canadian census. As a result of amendments to the Constitution Act, 1867, the number of seats in the House of Commons of Canada increased from 308 to 338.
Source: Wikipedia — 2012 Canadian federal electoral redistribution (CC BY-SA 4.0)