AerialRobotics EasyUAV Scenario 4 aerial photography and mission simulator.

The video shows benefits of mission planning using mission simulator on the PC connected directly to the autopilot built in the RC plane. You are sure what photos will be triggered and in what order the waypoints will be visited.

Using moderate flight altitude of 200m (always obey the local air trafic rules!) you can obtain the list of GPS coordinates from flight logs stored in the autopilot, using dedicated software. Matching the photos with GPS positions using free software gives accurately positioned images.
The photos are made in tight airspace, unachievable with other means except full scale helicopters, baloons and cranes... Path following precision, in particular, is limited to GPS accuracy. Unimaginable to fly such patterns with sensitive RC plane or full scale aviation.