Daniel saw a man measuring the new jerusalem

I think you may be referring to a biblical passage!

In the book of Revelation, chapter 11, verse 1, it says:

"Then I was given a measuring rod like a staff, and I was told, 'Rise and measure the temple of God, and the altar, and those who worship there.'" (Revelation 11:1, NIV)

In this passage, the apostle John is given a vision of the future, where he is instructed to measure the temple of God, which is often interpreted as a symbol of God's presence and worship. The measuring rod is given to Daniel, not a man, but rather the prophet Daniel is not mentioned in this passage.

The New Jerusalem is also mentioned in Revelation 21:2, where it says:

"And I saw the holy city, the new Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband." (Revelation 21:2, NIV)

In this passage, the New Jerusalem is described as a future city that will come down from heaven, where God will dwell with his people.