what is the relation of Sandford Fleming in Railway ?

Sandford Fleming

Sir Sandford Fleming, born on January 7, 1827 and died at (July 22, 1915) was a Scottish Canadian engineer and inventor.Born and raised in Scotland,
he emigrated to colonial Canada at the age of 18. He proposed worldwide standard time zones,designed Canada’s first postage stamp, left a huge body of surveying and map making,
engineered much of the Intercolonial Railway and the Canadian Pacific Railway,and was a founding member of the Royal Society of Canada and founder of the Royal Canadian Institute, a science organization in Toronto.