GeographyICSE Class 10 · Interpretation of Topographical Maps

Colour Tints, Symbols, Drainage and Settlement Patterns on a Toposheet (ICSE Class 10)

Updated 17 October 2026 · Draft, not yet fact-checked

On a Survey of India sheet, yellow shows cultivated land, green wooded areas, white barren land, blue water, brown contours and sand, red settlements, roads and grid lines, and black railways, tracks and boundaries. Conventional symbols are explained in the index at the foot of the sheet. Drainage patterns are dendritic (tree-like), trellised (right-angle joins) or radial (outwards from a high point); settlements are clustered or dispersed; transport is read as metalled road, unmetalled road, cart track, pack track, footpath or railway.

Understand Colour Tints, Symbols, Drainage and Settlements on a Toposheet

1. Colour tints (confirm with the legend on the sheet you are given).

Yellow: cultivated land. Green: forest or other wooded areas. White: barren or uncultivable land.
Blue: water: rivers, streams, tanks, wells, canals, lakes.
Brown: contours and form lines; also sand features.
Red: grid lines and their numbers, settlements and metalled and unmetalled roads.
Black: railway lines, cart tracks, pack tracks, footpaths, boundaries, names of places and features such as dry tanks.

A large yellow area tells you that farming is the main land use and occupation; large white areas are unused waste land.

2. Conventional symbols are the standard signs listed in the index (legend) at the bottom of the sheet. Examples include: perennial and non-perennial streams, wells (lined or unlined), tanks (perennial and dry), embankments, causeways, temples, mosques, churches, chatris (dome-shaped memorial), huts (permanent or temporary), post office (PO), police station (PS), rest house (RH), dispensary or hospital, open scrub and fairly dense jungle. When asked to name a feature, copy the legend's word and name only what lies in the stated square.

3. Natural and man-made features.

Natural: hills, ridges, slopes, streams and rivers, sand features, scrub and forest, lakes.
Man-made: settlements, roads, railways, canals, wells, tanks and reservoirs, embankments, causeways, temples, post offices and boundaries.

4. Drainage.

Direction of flow: a stream flows from higher to lower ground, so check contour values or spot heights along it. Where a stream crosses contours, the contours bend in a V whose point faces upstream. Some sheets also show the stream widening downstream.
Banks: the right and left banks are named by facing downstream, in the direction of flow.
Perennial and non-perennial: perennial streams flow all year (solid blue line); non-perennial or seasonal streams flow only in the rainy season (broken blue line). Many seasonal streams and dry tanks point to seasonal rainfall.
Dendritic pattern: streams join like branches of a tree; common where the rock is uniform.
Trellised pattern: tributaries meet the main stream at nearly right angles, forming a rectangular network; common where hard and soft rock alternate in bands.
Radial pattern: streams flow outwards in all directions from a central high point such as a hill.

5. Settlements.

Clustered (nucleated): houses grouped closely, usually near a water source, a crossroad or flat ground.
Dispersed (scattered): houses spread widely, often on large farms or rugged land.
Site: villages are placed on higher dry ground away from flood, near water (wells, tanks, streams), beside roads and near farmland.
Services: read from letters and symbols such as PO, PS, RH, dispensary, school, temple.

6. Transport and communication. Name the route shown: metalled road, unmetalled road, cart track, pack track, footpath, railway line. Do not write vehicles (bus, bullock cart) or broad modes (roadways). Communication means post office, telegraph office, telephone or similar symbols in the legend.

7. Reasons from the map. A causeway over a seasonal stream: the stream is dry for most of the year, so a raised road across its bed is enough. A reservoir with an embankment is man-made and stores monsoon water for dry months.

Colour Tints, Symbols, Drainage and Settlements on a Toposheet: key facts

Colour tints: Yellow cultivated land
Green forest
White barren land
Blue water
Brown contours and sand
Red settlements and roads
Black railways, tracks and boundaries
Drainage patterns: Dendritic tree-like
Trellised right-angle joins
Radial outwards from a high point
Settlement patterns: Clustered: houses close together | Dispersed: houses spread widely
Routes: Metalled road
Unmetalled road
Cart track
Pack track
Footpath
Railway line
Banks of a stream: Face downstream
Right side: right bank
Left side: left bank

Yellow	cultivated land
Green	forest
White	barren land
Blue	water
Brown	contours and sand
Red	settlements and roads
Black	railways, tracks and boundaries

Dendritic	tree-like
Trellised	right-angle joins
Radial	outwards from a high point

How to answer Colour Tints, Symbols, Drainage and Settlements on a Toposheet questions

Read the legend first, then answer from the square in the question.

1Open the legend at the foot of the sheet and match the colour or symbol to the feature named.
2Look only inside the grid square the question names.
3For drainage, trace the stream, check the contour values for the slope, and name the pattern from its shape.
4For a bank, face the way the stream flows; right is on your right hand.
5For settlements, say whether houses are close (clustered) or spread (dispersed), and add the site reason if asked.
6For transport, write the route type from the legend, not a vehicle.

Colour Tints, Symbols, Drainage and Settlements on a Toposheet in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Choosing a site for a new village school

Suppose a district office studies a toposheet to place a school. It finds a clustered village on a gentle slope with a tank, wells, a metalled road, yellow fields around it and a post office; a second village is dispersed on rugged land far from the road.

Which site is better and what map evidence supports the choice?

Try it first, then show the solutionSolution

The clustered village is better: more people live close together, so more children can reach the school.
Evidence: metalled road, services (post office), tank and wells for water, and cultivated land around it.

Answer: The clustered village on the gentle slope, backed by road access, services and water.

Memory hook: Look for road, water and people close together.

Tricks to remember Colour Tints, Symbols, Drainage and Settlements on a Toposheet

Short memory aids. Say each one aloud once, then use it on a question the same day.

Yellow farm, green forest, white waste
Yellow = fields of crops, green = trees, white = nothing grows (barren).
Use it when: Colour tints.
Blue water, brown contour, red people
Blue for water; brown for height (contours and sand); red for settlements, roads and grid lines.
Use it when: Quick legend recall.
Tree, trellis, wheel
Dendritic looks like a tree, trellised like a garden trellis (right angles) and radial like the spokes of a wheel.
Use it when: Drainage patterns.

Colour Tints, Symbols, Drainage and Settlements on a Toposheet: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Colours · 1 mark · Map workBoard level

What do the green and blue colour tints on a Survey of India sheet represent?

Try it first, then show the solutionSolution

Green shows forest or wooded land.
Blue shows water features.

Answer: Green: forest or wooded area. Blue: water features such as rivers, tanks and canals.

Example 2: Name the pattern · 2 marks · Map workBoard level

Over a plain of uniform rock, small streams join larger ones like the branches of a tree. A spot height of 212 m is marked near the northern end of the main stream and 205 m near its southern end. Name the drainage pattern and state the direction of flow.

Try it first, then show the solutionSolution

Streams joining like the branches of a tree form a dendritic pattern.
Water flows from higher to lower ground, so from the 212 m point in the north to the 205 m point in the south.

Answer: Dendritic; the main stream flows from north to south.

Example 3: Settlement and transport · 3 marks · Map workHarder board level

In a grid square a few houses stand far apart among fields, each beside its own well, and a footpath links them to the nearest road. Name the settlement pattern and the means of transport shown, and give one reason for the pattern.

Try it first, then show the solutionSolution

Houses standing far apart form a dispersed (scattered) settlement.
The route is a footpath (not "walking" or "roadways").
Reason: farmers live beside their own fields and wells, so houses are spread out.

Answer: Dispersed settlement; footpath; farmers live beside their own fields and wells.

Example 4: Right bank · 1 mark · Map workHarder board level

A river flows from north to south. A village lies on its western side. On which bank of the river is the village?

Try it first, then show the solutionSolution

Face downstream; the river flows south, so face south.
When facing south, west is on your right.

Answer: The right bank.

Example 5: Evidence from the map · 4 marks · Map workHOTS / competency

A sheet shows a canal with small branches, several wells, thick yellow tint, cart tracks leading to the fields, and a post office in a closely built village. (a) State the main occupation. (b) Name two sources of irrigation. (c) Name one service and one means of communication. (d) Why are cart tracks, not metalled roads, drawn to the fields?

Try it first, then show the solutionSolution

(a) Agriculture, shown by the thick yellow (cultivated) tint.
(b) The canal and the wells.
(c) The post office is a service and also the means of communication.
(d) Cart tracks are enough for bullock carts and tractors to reach the fields; a costly metalled road is not needed for short farm routes.

Answer: (a) Agriculture (b) Canal and wells (c) Post office (d) Short farm routes only need cart tracks.

Where students lose marks in Colour Tints, Symbols, Drainage and Settlements on a Toposheet

The slips examiners see most often, and what to write instead.

Mistake: Naming a vehicle for means of transport
Answers such as bus, bullock cart or "roadways" are not the route type shown in the legend.
Wrong working
Means of transport: bullock cart.
Right working
Means of transport: cart track.
Do this: Write the route type from the legend.
Usually costs: 1 mark.
Mistake: Naming features not present in the square
Candidates write what they expect rather than what the square shows.
Do this: Read only inside the named square and copy the legend term.
Usually costs: 1 mark.
Mistake: Confusing drainage and settlement patterns
Dendritic and clustered are mixed up because both words describe a "pattern".
Do this: Drainage patterns are for streams; settlement patterns are for houses.
Usually costs: 1 mark.
Mistake: Naming a bank by compass direction
The north or south bank is written instead of right or left bank.
Do this: Face downstream and use right or left.
Usually costs: 1 mark.

Exam tips

Open the legend at the start: it often settles the colour and symbol questions at a glance.
Give one clear word for each answer when the question is worth one mark.
For "give a reason" items, use evidence from the map (dry streams, wells, embankment).
Write temple or chatri, hut or house, exactly as the legend does.

Practice questions on Colour Tints, Symbols, Drainage and Settlements on a Toposheet

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
On a Survey of India toposheet, the red colour is used for:
(a) cultivated land
(b) contours
(c) settlements and metalled roads
(d) water bodies
Hint
Think of grid lines and buildings.
Answer
(c) settlements and metalled roads.
Q2 · 1 mark · MCQBoard level
Which of the following is a man-made feature?
(a) Ridge
(b) Perennial stream
(c) Embankment
(d) Sand dune
Hint
It was built.
Answer
(c) Embankment.
Q3 · 2 marks · Short answerBoard level
Give two points of difference between a clustered settlement and a dispersed settlement.
Hint
Spacing and site.
Answer
In a clustered settlement houses are grouped close together, usually near water or a crossroad; in a dispersed settlement houses are spread out, often on large farms or rough land.
Q4 · 2 marks · Map workHarder board level
Streams in a grid square join the main stream at nearly right angles in a rectangular network. (a) Name the drainage pattern. (b) Under what rock condition does it form?
Hint
Hard and soft bands.
Answer
(a) Trellised drainage. (b) Where hard and soft rock alternate in parallel bands.
Q5 · 2 marks · Short answerHarder board level
Explain why a broken blue line indicates a non-perennial stream. What does it tell you about local water supply?
Hint
Solid against broken.
Answer
A broken blue line is the symbol for a stream that flows only in the rainy season (seasonal). It suggests that water supply is limited in the dry season, so tanks, wells and reservoirs are needed.
Q6 · 1 mark · Assertion-reasonHarder board level
Assertion (A): Villages on a toposheet are often found along roads and near tanks or wells.
Reason (R): Roads give connection and water sources are essential for people and crops.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Hint
Why choose such sites?
Answer
(a).
Q7 · 2 marks · Map workHarder board level
A river flows from south to north. A temple lies on its eastern side. On which bank is it, and why is "east bank" not the expected answer?
Hint
Face downstream.
Answer
Facing north (downstream), east is on the right, so the temple is on the right bank. Banks are named by facing downstream, not by compass direction.
Q8 · 4 marks · Long answerHOTS / competency
Study this description of a sheet: yellow fields cover most of the area; hamlets are spread out with a few huts near each field; a reservoir with an embankment is shown beside a perennial stream; there is a metalled road and a railway line. (a) Name the main occupation. (b) Name the settlement pattern. (c) Give one use of the reservoir. (d) Name two means of transport shown.
Hint
Use each clue.
Answer
(a) Agriculture. (b) Dispersed. (c) It stores water for irrigation. (d) Metalled road and railway line.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Colour for cultivated land?Show answer
Yellow.
2.Which drainage pattern has tributaries at right angles?Show answer
Trellised.
3.What is a clustered settlement?Show answer
Houses grouped closely together.
4.How are banks of a stream named?Show answer
By facing downstream (right bank and left bank).
5.Where is the legend on the sheet?Show answer
At the bottom (the index).

Colour Tints, Symbols, Drainage and Settlements on a Toposheet: frequently asked questions

What do the colours on a toposheet show?

Yellow cultivation, green wood, white barren land, blue water, brown contours and sand, red settlements and roads, and black railways and boundaries.

How do I find the direction of a stream flow?

The stream flows from higher to lower contour values; contour Vs point upstream.

What is the difference between dendritic and radial drainage?

Dendritic is tree-like; radial streams flow outwards from a central high point.

What is a causeway?

A raised road across a seasonal stream bed or a low wet area.