1. Sketch showing reconnaissance for triangulation along the Rio Grande : from its mouth to El Paso. June 30th 1894 Yale Public content 1894. 2013-10-31T14:38:27Z. 2013-11-21T21:37:05Z. U.S. Coast and Geodetic Survey, issuing body. U.S. Coast and Geodetic Survey. English. Public. Texas and Mexico.