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Question
Give the meanings of the important terms used in toposheets.
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Solution
Open Scrub: It is the land where nothing grows. It is a sign of desert area. It indicates occupation as sheep or goat rearing.
Rock Outcrop: It is an exposed part of rock. Cultivation is not possible.
Sheet Rock: It is a mass or slab of rock, a portion of which is exposed above the surface. Shown in white it is also printed so.
Fire Line: A clearing is made in the forest to check the spread of fire.
Causeway: Causeway is a raised road or platform across a minor stream (not to be confused with a bridge). Its presence indicates areas of scanty or seasonal rainfall. Stream having causeway is motorable during dry season.
Broken Ground: It is the weathered part of the land caused due to erosion during heavy rain at the time of flooding. It is found mostly in dry regions around streams and rivers. On toposheet it is shown by tiny curved black line.
Aqueduct: It is a channel through which water flows.
Quarry: It is a pit from which limestone, marble, rock, sand or clay is obtained for building or other purposes.
Lime Kiln: It is a plant for manufacturing lime. Lime is used for making mortar which is used in holding bricks together.
Dry Well: The word ‘dry’ written in brackets near a well denotes a well that is dry in the dry season.
Brackish Well: The word ‘brackish’ written in brackets near a well means that the water in the well has a high salt content and is not fit for drinking. May be used for irrigation.
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Study the extract of the Survey of India Map sheet No. 45D/10 and answer the following questions:
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(i) Triangulated height 307.
(ii) The spot height 196.
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Give the four figure grid reference of each of the following:
(i) The confluence of the Sipu River and the Mahadeviyo Nala.
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(ii) The blue line in the bed of the Sipu River.
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(i) What is the general pattern of settlements in the region shown on the map?
(ii) Give a reason for your answer.
(f) Which is the chief form of irrigation shown in the map extract? Why is it necessary?
(g)
(i) What is the main form of transport in this region?
(ii) Give the map evidence for your answer.
(h)
(i) What is the compass direction of Dantiwada, 8582, fromBhadli Kotha, 7886?
(ii) What is the general direction of flow of the Arado. N?
(i)
(i) Name the type of drainage pattern found in grid square 8584.
(ii) What do you mean by 25r in grid square 8286?
(j)
(i) What is meant by ‘R.F.’?
(ii) What is the R.F. shown on this 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.
