Douglas, E. M. California MC Intosh landing quad surveyed in 1904 in cooperation with state of California , Scale [1:31680] Scale [1:5] Contour Interval 5 feet - Washington US geogological survey 1914 - 1 Map Coloured Map 52 x 42cm Datum is mean sea level Index Terms--Genre/Form: Topographic Map Dewey Class. No.: 912.794