Three-dimensional digitization (3DD) is the technique of recording position data in an electronic format. This process is performed through the use of coordinate measuring machines (CMMs), a broad classification of instruments whose purpose is to record position data. This paper will introduce 3DD and describe the operational theory behind a variety of CMMs. Applications for 3DD in the field of traffic accident reconstruction will be discussed, as well as the advantages and disadvantages of 3DD over traditional methods. The process of measuring a vehicle with CMMs will be presented along with special survey techniques to more effectively use electronic surveying equipment. Lastly, the means of converting recorded data to usable form will be described and a partial list of manufacturers for CMMs and modeling software will be provided.

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