Classifying Physical and Human Features on Ordnance Survey Maps

Hello again. In the previous lesson, you learned to use an OS map key to identify symbols accurately, rather than guessing from colour or shape alone. Now you will take the next step: deciding whether the feature represented is physical or human.

This completes the Reading Ordnance Survey Maps module. By the end of the lesson, you should be able to use a symbol, its map context, and an explanation of its origin to classify mapped features confidently.

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The central idea: where did the feature come from?

A physical feature is part of the natural environment. It has been made mainly by natural processes, such as flowing water, weathering, erosion, plant growth, or movements in the Earth.

A human feature has been made, built, planted, excavated, organised, or substantially changed by people.

The most useful question is therefore:

Is this mainly natural, or is it here because people created or deliberately changed it?

BBC Bitesize uses the same distinction: OS maps represent both physical and human features with symbols, and the key explains their meanings.

A map symbol does not always look obviously natural or human. For example, both a river and a motorway may be blue lines on an OS map. Their colour is not enough to classify them. First identify the feature using the key; then decide whether people made it.

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Classifying the symbols from last lesson

Here are the nine symbols you met previously, now organised by geographical type.

Feature identified from the OS key	Classification	Reason
River	Physical	It is a natural watercourse, shaped by flowing water.
Woods	Usually physical	Trees and vegetation are natural features, even though people may manage some woods.
Campsite	Human	People have created and organised it for visitors.
Motorway	Human	It is a built transport route.
Railway	Human	Rails, embankments, and stations are constructed by people.
Railway station	Human	It is a building and transport facility.
School	Human	It is a building and service provided by people.
Place of worship	Human	It is a constructed building or site.
Rural post office	Human	It is a human service and building.

Notice that you need two parts in a strong answer:

1. Name the feature accurately from the symbol or key.
2. Explain why it is physical or human.

For example:

• “The winding blue line is a river. It is a physical feature because it is formed naturally by flowing water.”
• “The line with railway markings is a railway. It is a human feature because it was built for transport.”

That short explanation shows you are classifying rather than simply memorising a list.

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Use map evidence, not just the symbol alone

A feature’s position and surroundings can help you check your answer. This is called using map evidence.

On this map extract, look for these clues:

Evidence on the map	What it shows	Classification
The winding blue line labelled R Noe	The River Noe	Physical
Brown contour lines around areas such as Offerton Moor	Changes in height and slope in the natural landscape	Physical
The railway beside Bamford Sta	A railway and station	Human
The network of coloured roads around Hathersage	Roads built for transport	Human
Clusters of building shapes and place names, such as Hathersage	A settlement	Human
Farm labels, such as Brookfield Farm	Land used and organised for farming	Human

Contour lines themselves are not objects on the ground: you cannot walk up to a “contour line.” They are a map method for showing the relief of the land. The relief they reveal — hills, slopes, valleys, and high ground — is physical geography.

The black line from A towards B has been added to the image as a pointer, so do not treat it as an OS map feature. Focus on the original symbols underneath and around it.

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A dependable classification routine

When you need to classify a feature on an OS map, work through this routine:

1. Identify the symbol using the key.
   Say exactly what it represents: for example, “quarry,” “river,” “woodland,” or “wind turbine.”

2. Look around it for supporting map evidence.
   A station should be on a railway; a bridge should cross a river; a settlement often has roads and building outlines nearby.

3. Decide how the feature came to be there.
   Natural processes suggest physical geography. Construction, extraction, farming, transport, and services suggest human geography.

4. Give a reason in your answer.
   Use the pattern:
   “It is a physical/human feature because…”

This method protects you from a common mistake: classifying a feature just because of its colour. Blue often indicates water, but a motorway may also be blue. Brown contour lines show physical relief, while brown building outlines show human-made structures.

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Some important “look carefully” examples

The trickiest symbols are often features that contain natural materials but have been changed by people.

Feature	Classification	Why
Quarry	Human	People dig out rock, sand, or gravel.
Landfill or spoil heap	Human	People deposit waste or excavated material there.
Reservoir	Human	It stores water behind a human-built dam, even though it contains water.
Marsh	Physical	It is a naturally wet area of land.
Cliff or rock outcrop	Physical	It is a natural landform or exposed rock.
Orchard	Human	Trees have been deliberately planted and managed to produce fruit.
Wind turbine	Human	People built it to generate electricity.
Electricity transmission line	Human	It is part of human infrastructure.
Field boundary	Usually human	Fields are normally divided and managed for land ownership or farming.

The official OS Explorer map legend is useful because it places many of these symbols side by side. It distinguishes human-made structures such as quarries, electricity lines, wind turbines, and buildings from vegetation and natural-relief symbols such as marsh, cliffs, contours, and boulders.

Woodland: the useful Year 7 rule

Woodland can be slightly less clear-cut than a river or a railway. People may plant, manage, or cut down trees, but trees are living parts of the natural environment. Unless the map gives stronger evidence that it is a planned land use — for example, an orchard — classify woods as physical in most Year 7 map-skills questions.

The important thing is to follow the classification expected by the map evidence:

• Woods, marsh, river, cliff, moorland: normally physical.
• Orchard, farm, quarry, reservoir, campsite: human.

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Writing map-skills answers clearly

When a question asks you to identify physical and human features, choose clear examples and support them with evidence.

A concise, high-quality answer could read:

“The River Noe is a physical feature because it is a natural watercourse. The contour lines around Offerton Moor show physical relief. Bamford railway station is a human feature because it was built for transport, and the roads around Hathersage are human features because people constructed them.”

This answer works because it:

• uses exact map evidence;
• gives both physical and human examples;
• explains each classification;
• does not assume that colour alone proves the answer.

A quick check before finishing is to ask: Have I named the feature, classified it, and explained why?

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Key takeaways

• Physical features are mainly natural: rivers, marshes, cliffs, woodland, and relief.
• Human features are made or deliberately changed by people: roads, railways, buildings, farms, quarries, reservoirs, and energy infrastructure.
• Always identify the OS symbol from the key before classifying it.
• Use surrounding map evidence to check your interpretation.
• A strong answer includes a reason: “It is physical/human because…”

In the next module, you will use another vital part of an OS map: its scale. You will begin by measuring a straight-line route on the map and calculating the real-world distance.