'Across' in the Bible

The Lord said to Satan, "Where have you come from?" And Satan answered the Lord, "From roving about on the earth, and from walking back and forth across it."

and suddenly a great wind swept across the wilderness and struck the four corners of the house, and it fell on the young people, and they died! And I -- only I alone -- escaped to tell you!"

And the Lord said to Satan, "Where do you come from?" Satan answered the Lord, "From roving about on the earth, and from walking back and forth across it."

Who set its measurements -- if you know -- or who stretched a measuring line across it?