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Using a light detection and ranging distance measurement system, BlueSky's aircraft-mounted laser technology determines heights of land and buildings. The digital data provides height above sea level readings every metre with an accuracy of 15mm. It is being used to calculate cut and fill volumes on projects ready for the earthworks stage. The 3D maps are created by aircraft equipped with a system of lasers flying over the routes set for new roads or railway lines at a height of less than 700m.

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