Sir Sidney Gerald Burrard, 7th Baronet, KCSI, FRS (12 August 1860 – 16 March 1943) was a British army officer who served as Surveyor General of India and played a major role in the Great Trigonometrical Survey's work in the Himalayas and identified the source of errors resulting from the displacement of the plumbline by the gravitational attraction of the mountains.
In 1874 he moved to Wellington College where again he excelled at mathematics which led his father to decide that he was suited for the Royal Engineers.
Pollen, who was posted as Aide-de-camp to the Viceroy, heard that there was a position for a young Royal Engineer who was good at mathematics and recommended Burrard's name to Lord Ripon.
Working with Heaviside and Strahan, he examined the causes of minute triangulation errors.
[1][2] In 1887 Burrard married Gertrude Ellen the daughter of the Superintendent of the Trigonometrical Survey, Major-General C.T.
Burrard went on furlough in 1890 to England where his wife, an artist, spent time to study painting.