APPENDIX D. 
DESCRIPTION OF MAPS AND PROFILES, WITH TABLE OF LATITUDES. 
Map No. 1 comprises that portion of California lying west of the San Joaquin or Tulare val¬ 
ley, between the Bay of San Francisco and the roadstead of San Pedro, together with the basin 
of the Mojave river. The entire coast line, with the exception of that portion lying between 
Point San Luis and the mouth of the Santa Clara river, was obtained from the Coast Survey 
chart, 1853. The geographical positions of the Picacho de Gavilan, Point Concepcion, and 
Santa Barbara, were also obtained from Coast Survey determinations. The eastern limits of 
the Coast Range, and the positions of Tulare river and Buena Vista lakes, also a portion of the 
Mojave valley, Los Angeles and San Bernadino plains, Santa Ana river, and the eastern and 
western limits of the Sierra Nevada, were obtained from the surveys of the General Land Office. 
The lower portion of the Mojave valley and the south end of Soda lake were taken from the sur¬ 
veys of Capt. A. W. Whipple and Lieut. R. S. Williamson, U. S. Topographical Engineers. 
Map No. 2 comprises the combined results of the surveys of 1854 and 1855, from the 
Pimas villages to the Rio Grande, at Fort Fillmore. The Rio Gila, from the Valle del Sauz, 
eastward, was obtained from the reconnaissance of Major W. H. Emory, U. S. T. Eng’s, 1846. 
The remaining portion of the Gila, the positions of Fronteras, El Paso, Fort Fillmore, Sugar 
Loaf (Peloncillo) camp, Dos Cahezas spring, (Puerto del Dado), mouth of Quercus canon, San 
Pedro springs, Tucson, Maricopa and Pimas villages, and mouth of the Salinas, (determined 
by Captain A. W. Whipple, Topographical Engineers,) and all the topography in the 
immediate vicinity of the recent boundary line between the United States and Mexico, were 
furnished from the office of the Mexican Boundary Commission. The northern extremities 
of all the mountains along this boundary line, from the 108° meridian to the San Luis 
range, (Sierra de los Animos,) and the position of Sierra Santa Rita, were determined by 
our own measurements, and on comparison were found to agree with the respective determina¬ 
tions of these points by the Boundary Commission, Major W. H. Emory, commissioner, 1855. • 
Sheet No. 3 comprises—1st. A profile of the route near the 32d parallel, from the Pimas vil¬ 
lages to the Rio Grande, at Fort Fillmore. 2d. A profile of the route from the Bay of San 
Francisco to the plain of Los Angeles. 3d. A general profile, from the Red river, at Fulton, 
to San Diego, California ; and 3d a. A continuation of this route to San Francisco, via San Gor- 
gonio pass and Los Angeles. And 4th. A detailed survey of Warner’s pass. Map Nos. 3 and 
3a comprise the profiles of Capt. John Pope, U. S. T. E., 1854 ; Lieut. John G. Parke, U. S. 
T. E., 1855, (32d parallel route) ; Charles H. Poole, esq., civil engineer ; Lieut. R. T. Wil¬ 
liamson, U. S. T. E.; and Lieut. J. G. Parke, Topographical Engineers, 1855, (California coast 
route.) Profiles Nos. 3 and 3a are of the same scale, and are intended to illustrate the com¬ 
parative lengths of the two routes, from Fort Yuma, Colorado river, to San Dingo, and to San 
Francisco hays, respectively. 
