1
What is a 'map'?
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A map is defined as a representation of the earth's surface or a part of it, showing natural or man-made features, drawn to scale on a flat surface.
Interpretation of Topographical Maps
ICSE Class 10 Geography · Total Geography · 8 solved questions
2
State the essential features of a map.
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The essential features of a map are:
- Title
- Scale
- Direction
- Grid System
- Conventional Signs
- Key or Legend
3
What do you mean by the 'key' of a map?
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Key of a map explains the meaning of the symbols that are used in the map. It is also known as legend.
4
Name the categories into which maps have been classified.
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On the basis of size, maps can be classified into two categories:
- Large scale maps (Cadastral maps and Topographical maps)
- Small scale maps (Atlas maps and Wall maps)
On the basis of content and purpose, maps can be classified into three types-
- Physical maps
- Political maps
- Thematic maps
5
What are the topographical maps?
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A topographical map shows the surface of the earth in detail. These maps are drawn on a number of sheets where each sheet depicts the details of only one particular part of the whole area. These sheets are joined to give a complete picture of the entire area.
Topographical maps show physical features like valleys, hills, peaks etc., as well as man-made features like roads, railways, canals etc.
6
What is the National Grid Reference (NGR)?
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National Grid Reference (NGR) is a system used to identify the exact location of a feature on a topographical map. It is based on grid lines, which are imaginary lines drawn in red on the survey map. The origin of the grid lies to the south-west of the map.
1
Give the four-figure grid reference of the following from the given map extract:
(a) Two settlements having a Post office.
(b) Two settlements having a dispensary.
(c) The Siphon.
(d) The confluence of the main river and Dior Nadi.
(e) The area of Brackish water.
(f) The Annual Fair grounds west of Malgaon.
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(a) 6131, 6233
(b) 6234, 6032
(c) 6231
(d) 5930
(e) 6232
(f) 6131
2
Give the six-figure grid reference of the following from the given map extract:
(a) Police Station.
(b) 4r near the rocky knob.
(c) Post office at Malgaon.
(d) The Surveyed tree at Posintra.
(e) Dispensary north of Posintra
(f) Hospital near Pamera
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(a) 625338
(b) 598321
(c) 615312
(d) 600320
(e) 608324
(f) 622340
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