Coast and Horizon’s edition of “Long Island Sound Triangulation 1881” charts the intricate triangulation network spanning from New York City to Point Judith as established in 1881. Originally produced by the United States Coast and Geodetic Survey, this meticulously detailed 17 x 28 inch map reveals the scientific precision that underpinned navigation and mapping in the late nineteenth century. Faithfully restored from archival scans, this reproduction preserves every line and label, making it both a striking visual piece and a testament to early American cartographic achievement.