This seemeth to signify the transcendency of the state of the church now, to what it was before; it was then measured by a man, Revelation 11:1-19, now by an angel; then by an ordinary reed, now by a golden reed.
Related Commentaries of Revelation 21:15
Revelation 21:15
15 And he that talked with me had a golden reed to measure the city, and the gates thereof, and the wall thereof.