Tunnel Topography Symbols Small 320×75 Medium 640×149 Large 1024×239 Download TIFF Original 2400×560 | (86.4 KB) Description A widely used topography symbol of a tunnel for drafting and map making. Keywords map symbols, symbol, Tunnel Map Symbol, Tunnel Topography Symbols Galleries Topography Source: French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)
