data collector—A device that operates in conjunction with electronic surveying instruments to automatically store data as it is collected in a computer-compatible format. The data collector can be part of a total station or can be a separate handheld unit. The handheld unit is generally equipped with a keyboard, which allows the user to manually input information and make some calculations while still in the field.

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Source: NSPS “Definitions of Surveying and Related Terms“, used with permission.

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