1. Triangulation between the St. Croix and Hudson Rivers and Lake Ontario. June 30, 1885 Yale Public content 1885. 2013-10-16T20:12:53Z. 2018-12-18T20:07:11Z. U.S. Coast and Geodetic Survey, issuing body. United States Coast and Geodetic Survey. English. cartographic image. Public. New England and Hudson River (N.Y. and N.J.).