Adam Clarke on 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 in a book, that is, a map, pointing out the face of the country, accompanied with descriptions of each part.