Charles Ellicott Commentary Zechariah 2:1

"And I lifted up mine eyes, and saw, and, behold, a man with a measuring line in his hand." — Zechariah 2:1 (ASV)

A man does not seem to mean “an angel,” as in Zechariah 1:8, for he has no message to deliver or mission to perform; but he is to be considered rather as a mere figure in the vision, performing an action for which, indeed, he is implicitly rebuked.