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Topographical Maps: Grid References, Contours and Heights, Part 2: Landforms and heights

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Lesson

Landforms hidden in the contours

Contours let you see landforms on a flat sheet. On our imagined sheet you can find a conical hill in the north, a ridge in the north-west, an escarpment in the east, a river valley running south-east and a gentle plain in the south and south-west. This part shows how to read each one.

In this lesson you will

  • Recognise a conical hill, a ridge, an escarpment, and steep and gentle slopes from their contours
  • Distinguish a triangulated height from a spot height
  • Calculate relative height and relative depth between two points
Imagined practice sheet, not a real place and not a Survey of India sheet
LandformWhere on the imagined sheet
Conical hillSquares 4678 and 4679, summit 478 m
RidgeSquares 4177 to 4378, crest 398 m
EscarpmentSquares 4875 and 4975
Gentle plainSouth and south-west, squares 4270 to 4572