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Primary Information or Marginal Information

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CISCE: Class 10

Key Points: Primary Information or Marginal Information

  • Marginal (primary) information is the important information printed on the margins of a topo-sheet.
  • It includes the sheet number, which shows the area of India represented on the map.
  • Latitude–longitude lines and Eastings–Northings help in locating places and estimating areas.
  • The map scale and contour interval show distance relationships and vertical height differences.
  • Margins also show true and magnetic north, legend (symbols), and year of survey/publication.
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