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Submission + - Scanning railroad tracks in 3D (controleng.com)

An anonymous reader writes: Control Engineering has an article about how the railroad companies are using high-speed 3D scanning at 30 mph to detect defects in railroad track. Up until now, amazingly, people have been walking the track to judge the condition of it.
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Scanning railroad tracks in 3D

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Do not underestimate the value of print statements for debugging.