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Question
What do you mean by ‘Marginal Information’?
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Solution
Marginal Information can be obtained from the margin of the sheet. The name of the state to which the area belongs is given at the top of the sheet. The year when the area was surveyed is also mentioned. The number of the sheet is given in the right hand top comer. The direction of the magnetic variation and true north position is also given in the right hand top corner.
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(e)
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(ii) 
277.
(g) Which are the two different kind of roads shown in the map extract?
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(i) How are the gentle and steep slopes shown on a map?
(j) What do the following mean?
(k) What is the direction of Dattani and Dhavli from Chandela?
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Study the extract of the Survey of India Map Sheet No. 45D/10 and answer the following questions: (Map G)
(a) Give the four-figure grid reference of:
(i) Dadarla (ii) Bhamra
(b) Which is the largest settlement shown on the map extract? Which one communication facility is exclusively available to this settlement?
(c) What does RF stand for? State the RF of the map provided to you.
(d) What is the total area of the actual ground represented in the map extract? (Show with the help of a simple calculation)
(e) What is meant by ‘contour interval’? State the contour interval of the toposheet provided to you
(f) State the highest and the lowest spot heights found on the map extract. Also mention whether they are in metres or in feet.
(g) Give the six-figure grid reference of:
(i) Spot height 339 (ii) Permanent hut located near Dhad Talao.
(h) What, according to you is the main (i) occupation, and (ii) religion of the people of the above area?
(i) Name one ‘natural’ and one ‘man-made’ source of irrigation used in this region.
(j) Name the general mode of transportation used in this region. What special feature of this mode is mentioned in the map extract?
If you are interpreting the cultural features from a topographical sheet, what information would you like to seek and how would you derive this information? Discuss with the help of suitable examples.
