Depression Contour Relief or Terrain Topography Symbol Small 295×320 Medium 590×640 Large 943×1024 Download Tiff Original 2211×2400 | (327.0 KB) Description A depression contour relief or terrain topography for drafting and map drawing illustrating lower land area. Keywords Depression Contour, Depression Contour Relief or Terrain Topography Symbol, symbol, symbols, terrain symbol, Topography Symbol Galleries Topography Source: French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)
