N.Y. General City Law § 26: Official map, establishment

§ 26. Official map, establishment. Every city by ordinance, local law

or resolution of the legislative body which has the authority to lay

out, adopt and establish streets, highways and parks may establish an

official map of the city showing the streets, highways and parks

theretofore laid out, adopted and established by law. Drainage systems

may also be shown on this map. Such map is to be deemed to be final and

conclusive with respect to the location and width of streets, highways,

drainage systems and the location of parks shown thereon. Such official

map is hereby declared to be established to conserve and promote the

public health, safety and general welfare. Said ordinance, local law or

resolution shall make it the duty of some appropriate official or

employee of said city at once to file with the clerk or register of the

county or counties in which said city is situated a certificate showing

that the city has established an official map.