(up to 5m per 1 hour of flight) Camera head stabilization precision (transients up to 5 deg, typically 2 deg) Fuselage pitch due to turbulence (up to 8 deg during hot weather, typically 2 deg in winter) Camera mounting error (typically 1-4deg if not calibrated) Heading/yaw error (the aircraft performs crabbing in presence of wind) Those errors nullify themselves during stitching and orthorectification of the images. The use of a roll-stabilized head increases useful area coverage (reducing distortion at map edges) and improving stitch quality inside during turbulent weather. In order to obtain georeferenced maps, it is necessary to provide positions of the object on-site or simply viewing the stitched image in Google earth (accepting occasional 50m position error vs true coordinates, but usually correct dimensions). Typical orthophoto map precision (mean reprojection errors): 10 cm horizontal 30 cm vertical around 2.5m global shift to be removed with a few locally measured points The precision of an orthophoto map created with professional processing chain depends on Ground Sampling Distance or Ground Pixel Size (variable 5 cm/pixel to 20 cm/pixel depending on flight altitude). With Ground Control Points provided, horizontal accuracy of the map as a whole improves from a few meters to GSD (5 cm to 20 cm). Vertical accuracy of produced DSM (always internally generated for orthorectification) is in the order of 3 GSD, i.e., 15 cm to 60 cm. Regardless of the use of Ground Control Points, the map is self-consistent geometrically within 1 GSD. Data processing strategies Several data processing approaches are possible depending on application: Direct photo examination Non-georeferenced image stitching using free software Using free 3D modelling services, as mentioned in examples section Importing each photo as ground overlay in Google Earth (semi-automatic with supplied software) Using pre-paid service based on cloud computing, yielding a result in hours (delivers Orto photomap and optionally DSM) Local processing using specialized GIS software created specifically for large scale image mosaicking (delivers Orto photomap and optionally DSM) System components Fuselage 3-section wings with mounting screws Horizontal stabilizer section Parachute User's equipment LiPo batteries (user's equipment) Laptop or netbook for occasional diagnostics or data log download (not required for takeoff nor pre-flight) Compact digital camera RC controller compliant with local laws (see Radio-controlled aircraft Transmitting and Receiving Frequencies) General characteristics Masses: Maximum takeoff weight 5.0 kg (fits RC model plane regulations in most countries) Dimensions: Wingspan: 2.8 m Length: 1.4 m