Government Flying Service provides regular flying service for Lands departments to undertake aerial survey over Hong Kong at different altitudes. Both multi-role fixed-wing aircraft Challenger 605 are specially modified and able to configure into aerial photography role when needed. The Large Format Digital Aerial Camera (UltraCam Eagle) system can be installed in the undercarriage of the aircraft equipped with multiple sensors to capture high resolution image with image size of 260 Megapixel. These images can be used and produced various types of aerial photographs for public and government usage, including colour, false colour infrared and oblique aerial photographs.