Notes/Description |
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Relief (printed in brown), Figures (showing heights above mean sea level instrumentally determined), Contours (showing height above sea, horizontal form, and steepness of slope, of the surface), Depression Contours, Levees, Cliffs, Mine Dumps, Drainage (printed in blue), Streams, Falls and rapids, Intermittent streams, Lakes and ponds, Intermittent lakes, Glaciers, Springs, Salt Marshes, Fresh Marshes, Tidal flats.
Culture (printed in black), Roads and buildings, Private and secondary roads, Trails, Railroads, Street railroads, Tunnels, Bridges, Ferries, Fords, Dams, Locks, U.S Township and section lines, Located township and section corners, Township and section corners not found, Triangulation stations, Bench marks, Mines and quarries, Prospects, Shafts, Mine tunnels (showing direction), Mine Tunnels (Direction Unknown)
The above signs are in current use on the topographic maps. Variations from this usage appear in some maps of earlier dates |