Below a compass rose to the left of the center of the map is a “Publishers Note” regarding the detailed identification of landowners:
This map has been published after a most exhaustive research and is based on an authentic road survey together with the use of private property surveys and supplemented by field work on the part of our own engineers. While it was orginally [sic] intended that only the owner’s names of large properties be shown, as many names as could readily be obtained to make it complete are given and in some instances where new names were not available, former names are shown as a means of reference.
Hyde & Company (later E. Belcher Hyde Map Company) was the main publisher of maps and atlases on Long Island from 1880 to 1920, which they issued in various formats, from folding maps to larger atlases. They produced detailed maps for the fire insurance industry that were updated on an annual basis based on surveys by Hyde employees. The degree of detail and specificity of these maps allowed the insurance companies to estimate the liability of certain properties because they showed every structure in an area, its building materials and size, its function, and other pertinent information about the street and surroundings. The company also published maps and atlases, including road maps, from the late 19th century and well into the 20th century, of Manhattan, Brooklyn, Queens and the New York Metropolitan area. Their major competitors in the publication of Long Island maps were F.W. Beers, G.W. Bromley & Co. and Chester Wolverton.
Full title: Map of Long Island Based Upon Recent U.S. Coast Surveys, Together with Local Maps on File. Supplemented by Careful Territorial Observations.
Full publication information: Copyright 1923, by E. Belcher Hyde, Inc.
Allen, David Yelling. Long Island Maps and Their Makers. Mattituck, N.Y.: Amerion House, 1997. pp. 97-98.
Wright, Artis Q. “Navigating the Library’s New York City Maps.” New York Public Library. https://www.nypl.org/blog/2016/12/14/nypl-new-york-city-maps (3 September 2020).