| Notes/Description |
: |
Datum is mean sea level Relief (printed in brown), Figures (showing heights above mean sea level instrumentally determined), Contours (showing heights 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, Canals and ditches, 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.
The above signs are in current use on the topographic maps. Variations from this usage appear in some maps of earlier dates. |
