Technical developments provided for improved efficiencies. These included use of single photographs and strips of air photographs to supplement ground surveys by plane-table for topographic detail. The first military map produced with a significant component of aerial photography flown by the Royal Australian Air Force was the Albury 'one-mile' map published in 1933. Compilation of this map highlighted inconsistencies in State triangulation systems and once again demonstrated the need for a national geodetic survey which had been identified by colonial survey officers in the 1890s.