John Calvin's Commentary on the Bible - Joshua 18:4
Verse 4 4.Give out from among you three men, etc Caleb and Joshua had already surveyed those regions, and the people had learned much by inquiry: Joshua, however, wishes the land to be divided as if according to actual survey (162) and orders three surveyors to be appointed for each of the seven tribes, in order that by the mouth of two or three persons every dispute may be settled. But nothing seems more incongruous than to send twenty-one men, who were not only to pass directly through a... read more
Adam Clarke's Commentary on the Bible - Joshua 18:9
And described it in a book - This as far as I can recollect, is the first act of surveying on record. These men and their work differed widely from those who had searched the land in the time of Moses; they went only to discover the nature of the country, and the state of its inhabitants; but these went to take an actual geographical survey of it, in order to divide it among the tribes which had not yet received their portions. We may suppose that the country was exactly described... read more