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Topographic or Ordnance Survey Maps

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CISCE: Class 10

Key Points: Topographic or Ordnance Survey Maps

  • Topographical maps show the detailed surface features of the Earth and are also called topo-sheets or Ordnance Survey maps.
  • The word topography comes from Greek words topos (place) and grapho (to draw).
  • These maps are drawn on separate sheets, each showing a part of an area, which together give a complete picture.
  • In India, topographical (Ordnance) maps are prepared by the Survey of India, Dehradun.
  • Topographical maps show physical features using contours and man-made features using conventional symbols.

Related QuestionsVIEW ALL [74]

Study the extract of the Survey of India Map sheet No. 45D/10 and answer the following questions:

    1. Give the six-figure grid reference for the temple that is located to the southwest of Pithapura settlement.  (1)
    2. Give the four-figure grid reference for a settlement where people of the region meet socially and for trade at least once in year. (1)
    1. What is the pattern of drainage seen in the grid square 2118? (1)
    2. What is the pattern of settlement seen in the grid square 1923? (1)
  1. What do each of the two numbers (281 printed in black colour and 20 printed in red colour) in the grid square 1818 indicate? (2)
    1. Name any two man-made features in grid square 2419. (1)
    2. Name any two natural features in grid square 2118. (1)
  2. What is the significance of the following?
    1. Fire line in grid square 2417. (1)
    2. Water body found in grid square 2221. (1)
  3. Calculate the area of the region between 16 and 19 Eastings and 18 and 22 Northings. Give your answer in square kilometers. (2)
  4. Give a reason for each of the following:
    1. The water in some of the wells in the north-west quarter of the map is not fit for drinking. (1)
    2. The region near Anadra and Gulabgani has many causeways. (1)
    1. What is the main means of irrigation used by people living in the area shown on the map? (1)
    2. What is the main occupation of the people of the region shown on the map? (1)
  5. Which, according to you, is the most important settlement?  Give a reason to support your answer. (2)
  6. Name any two means of transport used by the people living in the area shown on the map extract. (2)
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