Any data captured in the scanning process is not perfect. Data accuracy depends on the accuracy of the scanning equipment as well as the conditions under which the measurements are made. To properly report measured data, the error associated with the measurement should be taken into account.

Experimental error should not be thought of as a mistake. The difference between the “true” value of a distance vs. the measured value is the “error” of the measurement. A measurement is deemed accurate if the error is small (a relative term).

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