Interpretation of Topographical Maps — II

Multiple Choice Question

Question 1

What does the black line in 4812 indicates?

1. Seasonal stream
2. Contour
3. Cart track
4. Dry land

Answer

Seasonal stream

Question 2

What does the brown line in grid square 4927 indicate?

1. Cart track
2. Contour
3. Pack track
4. Stream

Answer

Contour

Question 3

The direction of Amarapura from Dantrai is

1. SE
2. NW
3. SW
4. NE

Answer

NW

Question 4

What is the feature in broken black lines in grid square 4932?

1. River
2. Stream
3. Disappearing stream
4. Broken ground

Answer

Broken ground

Question 5

What is the distance in km between Awara and Marol as the crow flies, the scale being 2cm = 1km?

1. 4 cm
2. 4.5 cm
3. 2.25 km
4. 2 m

Answer

2.25 km

Question 6

What does the term Causeway mean in grid square 4723?

1. It is a road across a river
2. A raised platform across a stream
3. It is a cart
4. It is a stream

Answer

A raised platform across a stream

Question 7

The broken line in red in grid square 6812 and 6913 indicates

1. A cart track
2. A footpath
3. A pack track
4. A road

Answer

A pack track

Question 8

The term Diggi in grid square 6226 means

1. A well
2. A tank which is used for collection of water
3. An artificial tank
4. A tube well

Answer

A tank which is used for collection of water

Question 9

In grid square 6827, the double dotted line means

1. A road in the forest
2. A clearing made in the forest to prevent spread of fire called fire line.
3. An unmetalled road to cross the forest
4. Clearing the forest for farming purpose

Answer

A clearing made in the forest to prevent spread of fire called fire line.

Question 10

What does the number 158 in the grid square 2189 indicate?

1. A spot height of 158 m
2. Height of the surveyed tree above sea level is 158 m
3. A prominent survey point shown as surveyed tree at the height of 158 m above sea level
4. Surveyors mark is 158

Answer

A prominent survey point shown as surveyed tree at the height of 158 m above sea level

Question 11

State any two means of communication in grid square 4485

1. A dry river and pack tract
2. A railway track and metalled road
3. Cart tract and footpath
4. Express way and cart track

Answer

A railway track and metalled road

Question 12

What is meant by BM 224 in grid square 4485?

1. It is Bench Mark, cut on a rock wall or a building showing the height of that mark above sea level is 224 m
2. It is Benchmark, 224 m above sea level
3. The height of the point where it is written
4. It is the height of the sand dune above sea level

Answer

It is Bench Mark, cut on a rock wall or a building showing the height of that mark above sea level is 224 m

Question 13

Which drainage pattern is seen in grid square 3893?

1. Radial
2. Dendritic
3. Trellised
4. Intermittent

Answer

Trellised

Question 14

Which drainage pattern is seen in grid square 4196?

1. Dendritic
2. Trellised
3. Radial
4. Intermittent

Answer

Trellised

Question 15

Which drainage pattern is seen in grid square 4085 and 4086?

1. Trellised
2. Dendritic
3. Radial
4. Intermittent

Answer

Radial

Question 16

The blue line in the main river indicates

1. A perennial
2. A thin perennial Nala
3. A thin water channel
4. A stream

Answer

A thin water channel

Question 17

What does the number 381 indicate in grid square 4388?

1. Approximate height is 381
2. Relative height
3. Spot height showing the height of a particular point above sea level is 381 m
4. Spot height showing the height of that place is 381

Answer

Spot height showing the height of a particular point above sea level is 381 m

Question 18

What does △ 224 in grid square 2706 indicates?

1. The height of a particular point
2. Triangulated height - showing the height of a point surveyed by the triangulated method is 224m
3. Triangulation survey showing the height of a point of 224m
4. Approximate height of the point is 224 m

Answer

Triangulated height - showing the height of a point surveyed by the triangulated method is 224m

Question 19

State the area of the grid square 5121, the scale being 2cm = 1km.

1. 4 sq km
2. 2 sq km
3. 1 sq km
4. 1 km

Answer

1 sq km

Question 20

Name the three types of communication shown in the grid square 6621.

1. Metalled road, cart track, pack tract
2. Cart track, footpath, road
3. Footpath, pack track and metalled road
4. Cart track, road and footpath

Answer

Footpath, pack track and metalled road

Question 21

Give four figure grid reference of the temporary huts

1. 4199
2. 4099
3. 9940
4. 0041

Answer

4099

Question 22

Identify the type of settlement in the given extract.

1. Compact settlement or Nucleated settlement
2. Linear settlement
3. Scattered settlements
4. None of the above

Answer

Compact settlement or Nucleated settlement

Question 23

Identify the type of settlement in grid square 6223

1. Compact settlement or Nucleated settlement
2. Scattered or dispersed settlement
3. Linear settlement
4. Temporary huts

Answer

Scattered or dispersed settlements

Question 24

On which bank of the river Sipu is Marol situated? Give a reason for your answer.

1. Right bank, as the spot height is on the right bank
2. Left bank as the arrow shows river is flowing from east towards SW. If we stand at the source in the east facing the river, Marol is on the left bank
3. Marol is on the right bank as slope of the land is towards SW
4. Marol is situated on the left bank as the river is flowing from SW to NE

Answer

Left bank as the arrow shows river is flowing from east towards SW. If we stand at the source in the east facing the river, Marol is on the left bank

Question 25

What are the following —

(a) The black vertical line between Easting 55 and 56

1. Northing of 55 in the given extract
2. Line of Longitude, 37'30"
3. Line of Longitude 37
4. None of the above

(b) The black horizontal line between Northing 16 and 17

1. Northing of 55 in the given extract
2. Line of Latitude, 32'30"
3. Line of Longitude 37
4. None of the above

Answer

(a) Line of Longitude, 37'30"

(b) Line of Latitude, 32'30"

Question 26

What is the conventional sign given in grid square 5824?

1. Brick kiln
2. A Well
3. A Quarry
4. A Brick Mine

Answer

Brick kiln

Question 27

What does the area shown in green wash represent?

1. Cultivable land
2. Uncultivable land
3. Forest area
4. Barren area

Answer

Forest area

Question 28

Name the relief feature shown by contours in grid square 7127

1. A hilly area
2. A steep slope
3. Slope of the land
4. A highland

Answer

A steep slope

Question 29

What is the type of relief feature shown by the contours on grid square 4097?

1. A steep slope
2. A gentle slope
3. Slope of the land
4. Higher elevation

Answer

A gentle slope

Question 30

What are the following in the given extract?

(a) Yellow wash

1. Flat land
2. Cultivable land
3. Barren land
4. None of the above

(b) Blue dots

1. The perennial tanks
2. Perennial lined wells
3. Unlined wells
4. Perennial ponds

Answer

(a) Cultivable land

(b) Perennial lined wells

Question 31

What does 10 r indicate grid square 6832?

1. 10 r stands for the height of the artificial perennial tank as 10m
2. 10 r means that the relative height of the embankment of the perennial artificial tank is 10m
3. 10 r is the relative depth of the artificial tank
4. The height of the embankment of the artificial tank is 10 m

Answer

10 r means that the relative height of the embankment of the perennial artificial tank is 10m

Question 32

What is the direction of Banas River? Give a reason for your answer other than it being shown by the arrow?

1. West to east as it is a flat land
2. Shown by the arrow
3. NE to SW as the spot heights are receding from NE to SW eg., △ 166, 138 ...
4. It is a dry river flowing from west to east

Answer

NE to SW as the spot heights are receding from NE to SW eg., △ 166, 138 ...

Reason— Receding spot heights can be seen from NE to SW which means that the slope of the land is towards SW and hence the direction of the flow of river.

Question 33

What does 3 r indicate in grid square 5618?

1. 3 r is the height of the dry tank
2. 3 r is the relative depth of the tank
3. 3 r means relative height of the dry tank is 3m
4. It means the height of the tank is 3m

Answer

3 r means relative height of the dry tank is 3m

Question 34

(a) What does Aqueduct in grid square 2201?

1. An artificial canal
2. An artificial channel for conveying water typically in the form of a bridge across a valley
3. A perennial canal
4. A water channel supplying water through an artificial canal

(b) The given map extract receives seasonal rainfall because of

1. Flat land
2. Broken ground
3. Uncultivable land
4. White patch of land

Answer

(a) An artificial channel for conveying water typically in the form of a bridge across a valley

(b) Broken ground

Question 35

Give four figure grid reference of a causeway in the given extract.

1. 3467
2. 6733
3. 6834
4. 3368

Answer

6733

Question 36

What is the occupation of the people other than farming in grid square 5723 and 5724?

1. Trade
2. Sheep rearing
3. Working on the canal construction site
4. None of the above

Answer

Working on the canal construction site

Answer the following questions

Question 1

Define Contour.

Answer

Contours are lines drawn in brown colour, joining places having the same elevation above mean sea level. The contour lines on a map provide a useful insight into the topography of an area.

Question 2

What is hachuring used for?

Answer

Hachures are short lines representing directions of a slope. For steep slopes they are drawn closer together than for the gentle slopes. They cannot be used for flat ground.

Question 3

What is a gradient? How is it determined?

Answer

The term gradient refers to the slope of the concerned feature. It is determined by calculating the Horizontal Equivalent. Horizontal Equivalent is the distance between the two contour lines. If it is less, the slope is steep and if it is more, the slope is gentle.

Question 4

What are form lines?

Answer

Form lines are the contour lines drawn as broken lines which are used to indicate the approximate heights above sea level. They are used to indicate the elevations of the area which are not accessible for proper survey.

Question 5

What are spot heights? How are they represented on the map?

Answer

Spot heights are points which show the height of that point from the mean sea level. They are represented by a dot with a number beside it. If the spot height is shown as .220, it means that the height of that point is 220 m from the mean sea level.

Question 6

What is meant by Bench marks? How are they represented on the map?

Answer

Bench marks are the permanent survey points shown by a stone or a building. They show the height of that point above sea level through accurate survey. The Bench mark is represented on the map as 'BM' with a number beside it. For example, 'BM 230 m' shows a bench mark with 230 m height.

Question 7

What is meant by index contours? In what way are they useful?

Answer

In a contour map, every fifth line in multiple of 20 m is accentuated and is called the Index Contour.
Index contours make the contour map distinct. They also indicate whether the height of the terrain is increasing or decreasing.

Question 8

Differentiate between vertical interval and horizontal equivalent.

Answer

Question 9

What is a grid?

Answer

The network of horizontal and vertical lines, or the Eastings and Northings on a topo sheet is called the grid.

Question 10

What points should be kept in mind while reading a grid reference?

Answer

The Following point should be kept in mind while reading a grid reference:

1. Origin is the south-west corner of the map. The reading on the map is always taken with reference to this origin.
2. Eastings are always read to the East of the origin.
3. Northings are always read to the North of the origin.
4. While giving a grid reference, Eastings are always stated first, followed by the Northings.
5. The readings are always taken to the right of the Eastings and to the North of the Northings

Question 11(a)

Identify and name the relief features represented in the given diagram.

Answer

A Hill flat top gentle slope

Question 11(b)

Identify and name the relief features represented in the given diagram.

Answer

A v-shaped Valley

Question 11(c)

Identify and name the relief features represented in the given diagram.

Answer

A Ridge

Question 11(d)

Identify and name the relief features represented in the given diagram.

Answer

A hill with gentle and steep slope

Question 11(e)

Identify and name the relief features represented in the given diagram.

Answer

A conical hill with steep slope

Question 11(f)

Identify and name the relief features represented in the given diagram.

Answer

A conical hill