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What Are ‘National Grid Reference’?

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Question

What are ‘National Grid Reference’?

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Solution

Grid lines are imaginary lines drawn on a survey map in red colour. The origin of the Grid is a point south-west of the map. The ‘National Grid Reference’ is used for indicating the correct position of a particular feature on the map.

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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)

(i) What is the importance of a Relief Map.

(ii) How can we show occupations by the evidences of names or by inference of relief features?


Name the various types of settlement patterns found on toposheet.


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

(a) Give the six figure grid reference of:
(i) the brick kiln
(ii) the temple near Asav.

(b) What is the difference in the pattern of drainage in grid square 0916 and in 0712?

(c) Give the four figure grid reference of each of the following:
(i) Stony waste
(ii) Open scrub.

(d) Calculate the distance in kilometres along the metalled road between the causeways in grid square 0512 and 0808.

(e) (i) What do the tiny curved black lines in grid square 0315 indicate?
(ii) What is the main cause for this feature?

(f) (i) What is the geographical name that you would give to the general pattern of settlements in the region shown on the map?
(ii) Give a reason for your answer.

(g) What is the general direction of flow of the Sipu Nadi, given in the map extract? Give a reason to support your answer.

(h) Name two probable occupations of the people in the settlement of Revdar in grid square 0313 and 0413.

(i) What kind of roads connect (i) Marol with Mitan and (ii) Revdar with Karaunti respectively?

(j) Give two reasons to show that the area depicted in the map experiences seasonal rainfall.


Study the extract for topographical sheet 63K/12 shown in the figure below and answer the following questions.

  1. Give the height of the highest point on the map.
  2. River Jamtihwa Nadi is flowing through which quarter of the map?
  3. Which is the major settlement located in the east of the Kuardari Nala?
  4. What type of settlement does the area have?
  5. Name the geographical feature represented by white patches in the middle of Sipu Nadi.
  6. Name the two types of vegetation shown on part of the topographical sheet.
  7. What is the direction of the flow of the Kuardari?
  8. In which part of the sheet area is Lower Khajuri Dam located?

R. F. 1: 50,000
Part of the Topographical Sheet No 63K/12


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