The chief water-front map of the city is the Greater New York water-front survey arranged in sheets. This has been published on a reduced scale. Next in importance to the present water-front survey is the Mc-Clellan survey of 1870, and the maps formerly compiled under the direction of the Street Commissioner, of which there are about 300 in 13 volumes, many of which refer to the water-front. Of these one of the most useful is the Randall map made in 1820 by John Randall, Jr., pursuant to a resolution of the Common Council to show the location of the farm lines, topography of the land, streams, ponds, water-courses, etc.

In using this map dimensions have to be obtained by scale. It gives high and low water marks. There are also a large number of old-shore maps and many maps dealing with certain particular water-front sections of the city, which will be found of great service for special purposes. Nor should water-front records of tides and currents be overlooked, the records of tidal heights being of service in establishing on a piece of property the mean lines of high and low water marks.