In addition, there was a miscellany of surveys, maps and information produced by the Corps for units of each of the Armed Services. These included: production of air navigation charts for the Royal Australian Air Force covering Australia and a large area of its region totalling about eight percent of the earth's surface; printing hydrographic charts for the Hydrographer Royal Australian Navy; joint and single service training area special surveys, maps and models including live fire requirements; vital asset protection maps; safeguarding maps for ammunition depots; digital terrain data and models for command and control, communications, intelligence, surveillance, reconnaissance, simulation, weapons and geographic information systems; photomaps using air and satellite photography.