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Question
What are ‘National Grid Reference’?
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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RELATED QUESTIONS
Give the four figure grid reference of the settlement of Hamirpura.
How does the feature, indicated by the black curves in 0721, show that rainfall in this region is seasonal?
Give the six figure grid reference of lined well near Chekhla.
What is a “Topographical Map”?
What are ‘Eastings’ and ‘Northings’?
Which colours are used on toposheets? What is their significance?
(i) On a topographical map two stations A and B are situated at height of 500 metres and 100 metres respectively. If the horizontal distance between them is 2 km, calculate the gradient.
(ii) On a topographical map, two places A and B are given. Calculate the gradient between them.
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) Triangulated height 217
(ii) A lined well near Chekhla.
(b)
(i) Name the left bank tributary of the main river.
(ii) State the direction in which this left bank tributary is flowing.
(c)
(i) Mention a special feature associated with the streams in grid square 9879.
(ii) Name the types of drainage pattern found in grid square 9382.
(d) Give the four grid reference of each of the following:
(i) Open scrub
(ii) Bantawada.
(e) Name two relief features that can be seen in grid square 9782 and 9574.
(f) Why do you find limited cultivation in the map extract?
(g) What is the compass direction of Antroli (9576) and Chekhla (9281) from Sangla?
(h) What type of rainfall is experienced in the region shown in the map extract? Justify your answer giving one reason.
(i) Calculate the distance in kilometres along the cart track between Chitrasani (999747) and Pirojpura (978753).
(j)
(i) What is the geographical name that you would give to the general pattern of settlements in the region shown on the map?
(ii) Name one region shown on the map which is unsuitable for the cultivation of crops.
Answer the following questions on the Survey Sheet Number 45 D/7.
(a) Give six figure grid references of the following:
(i) ∆ 364 (ii) The temple at Rampura
(b) Mention any two features seen in the map extract which show that the region has seasonal rainfall
(c) Calculate the distance in kilometres along the cart-track linking Juvol (923826) and Amiwada (944817).
(d) Which is the chief form of irrigation shown in the map extract? Give an evidence to justify your answer.
(e) Give one reason to explain why the streams in grid square 9478 do not join a river. Identify another grid square in the map extract that has similar streams.
(f) What do the following represent:
(i) Black broken lines in 9575 (ii) Black curved lines in 9879.
(g) Identity two landforms shown by the contours in grid square 9876.
(h) (i) What is the general direction of the Balram Nadi?
(ii) Which bank of the main river does the Balram Nadi join?
(i) What is the main occupation of the people living in the area shown in the map extract? Give one reason to support your answer.
(j) What is meant by scale of a map? What is the scale of the map extract provided to you?
Write short note on ‘Marginal Information’ in Topographical sheets.
