Question

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?

Answer 1

(a) The four figure grid reference of: (i) Dadarla -1020 (ii) Bhamra – 0420

(b) Dantrai is the largest settlement shown on the map extract. Post Office (PO) is the one communication facility which is exclusively available to this settlement.

(c) RF stands for Representative Fraction.
RF = `"Distance between two points on the map"/"Distance of the corresponding points on the ground"`
RF of the map is 1:50,000, i.e., 1 unit on the map is equal to 50000 units on the ground.

(d) 
Area from North to South = 9.2 cm
Area on Ground will be = `9.2/2 = 4.6` km
Area from East to West on map = 7.3 cm
Area on Ground will be = `7.3/2 = 3.65 "km"`
Total area of the actual ground is

= Area from N to S on ground × Area from E to W on ground

= 4.6 km × 3.65 km = 16.79 sq.km.

(e) Contour interval means the difference between two consecutive contour lines. Contour interval of the given toposheet is 20 metres.

(f) Highest spot height is 339 metres and the lowest is 263 metres.

(g) 
(i) Spot height 339 – 042276
(ii) Permanent hut located near Dhad Talao – 077225

(h)
(i) Occupation: The main occupation of the people of this area is agriculture. Yellow colour over the map stands for agricultural land. White patches on the map shows the uncultivated land.
(ii) Religion: The symbol of temple all over the map proves that mostly people belongs to Hindus religion.

(i) Natural source of irrigation is Sukli Nadi. The solid blue circle and hollow blue circle indicates the presence of lined and unlined perennial well as the man-made source of irrigation.

(j) The general mode of transportation is bullock or horse cart. A single red line shown on the map indicates the cart-track. It is a path broader than a pack track, made by bullock or horse cart.