[1] Riise's elder brother Harald Riise (17 October 1856 – 14 January 1892) trained as a photographer and travelled to Australia by way of London in circa 1881, settling in H Hobart where he opened a photographic studio in a partnership with Henry Walter Barnett..

[2] Riise was a board member of Dansk fotografisk forening from 1891 to 1996 and for some of the time served as vice president of the association.

the 1922 World Expo in Rio de Janeiro and the 1925 International Exhibition of Modern Decorative and Industrial Arts in Paris.

In 1911 he was elected as president of the Historical-Technical Society and worked for the creation of a collection of historical technical instruments and devices.

[1] Riise married Anna Dorothea Christine Westergaard (23 November 186 – 29 July 1939), a daughter of civil servant Christian Jørgensen Worm (1824–94) and Anna Rebecca Martine Elisabeth Bille (1831–89), on 5 April 1889 in the Church of Holmen.