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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.
RELATED QUESTIONS
Give the six figure grid reference of Triangulated height 217
Give the six figure grid reference of lined well near Chekhla.
Name the left bank tributary of the main river.
Why do you find limited cultivation in the map extract? Give two reasons for your answer
What is the compass direction of Antroli (9576) and Chelkha (9281) from Sangla?
What type of rainfall is experienced in the region shown in the map extract? Justify your answer giving one reason.
What do you understand by a causeway?
Why are directions on a map important?
Study the extract of the Survey of India Map Sheet No. 45 D/7 (A – B) and answer the following questions:
(a) (i) What does the abbreviation R. F., stand for?
(ii) What does 20r (grid sq. 8295) mean.
(iii) What does V near Shergadh village in the south-east corner mean.
(b)
(i) What type of relief do you observe in north-west of the map (West Panswala)?
(ii) Why is the land shown in white shade not put to cultivation?
(c)
(i) What seems to be the importance of village Jegol in grid sq. 8590 in the south?
(ii) Find out the length of the joint stream of rivers Sipu, Varka and Hanva.
(d) What type of relief feature is found close to Varkanala and Hanvanala near Gangudra in the centre of the area?
(e) Give four figure grid reference of a well marked meander of Varkanala and Sipu river.
(f)
(i) What does the black line marked 24°30′ in the north denote.
(ii) What is the meaning of 72°20′ north-south black line in the western part of the map?
(iii) What do the figures 280, 300, 500 etc., written in brown on east margin of the map indicate.
(g)
(i) Point out two man-made features on the map.
(ii) What is the direction of the river Sipu 83 C 86 grid lines?
(iii) What is the grid reference (four figures) of the lime kiln located near Rampura village in the north-west?
Study the extract of the Survey of India Map Sheet No. 45D/7 and answer the following questions:
(a) Give the six-figure grid reference of:
(i) ∆ 225 (ii) A lined well near Ganguwada.
(b) Name the most important perennial source of irrigation shown on the map extract.
(c) (i) What does 3r in the grid square 8895 mean?
(ii) What do you mean by 20r in the grid square 8994?
(d) Give two points in evidence to show that the region in the map extract has seasonal rainfall.
(e) (i) What does the blue line in the Varkanala indicate?
(ii) What is the general direction of the Varkanala?
f) (i) What is the meaning of 1 : 50000 printed below the map extract?
(ii) Calculate the distance in km., along the cart track between Jegal in the grid square 8590 and Odhava in the grid square 8892.
(g) Which part of the map is more developed in agricultural occupation? Give a reason for your answer.
(h) Give the four-figure grid reference of confluence of Sipu river and Varkanala.
(i) Name two types of vegetation in the given map extract.
(j) What is the pattern of drainage in the grid square 8599?
(k) (i) How many types of tracks are shown in the map extract? Name them.
(ii) What is the common mode of transportation in the southern part of this map?
(l) What is the general pattern of settlement? Why?
