This is EasyUAV returning from 3km-long linear mapping mission.
The stitched results are here
aerialrobotics.eu/examples/LineMap-s1.png

Flight pattern looked like this:
aerialrobotics.eu/examples/LinearMap-Landing.png
aerialrobotics.eu/examples/LinearMap-Target.png

A similar flight with onboard camera is here:
vimeo.com/6793206

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