Map Reading and Interpretation
Senior 5 · Geography
Map Reading and Interpretation
Lesson 4 of 4
25 min
A topographic map is a record of how people have used a piece of land. The order of work in an examination is always the same: first describe the physical landscape (relief, drainage, vegetation), then the human landscape (settlement, communication, land use, services), and finally explain the relationships between the two. Every statement needs evidence from the map: a feature, a height or a grid reference.
Definition
Physical feature: a natural part of the landscape, such as a hill, valley, river, marsh or natural forest. Human (cultural) feature: anything people have made or changed, such as a road, building, plantation or bridge. Example: on Map A, Hill V is a physical feature and the tea estate a human one.
| Aspect | Description | Evidence |
|---|---|---|
| Relief regions | (1) Hill T, a high, steep-sided hill in the north-west; (2) Hill V, a smaller rounded hill in the south-east; (3) the Nyaga valley, a broad, gently sloping lowland running from north-east to south-west between them | Trig station 1,779 m at 224457; spot height 1,687 m at 276415; closely spaced ring contours on the hills; widely spaced contours along the valley |
| Drainage | One main river, the Nyaga, flowing south-west, with two tributary streams: one from Hill T joining from the north-west, one from Hill V joining from the south-east | Heights fall along the river from the 1,400–1,450 m band in the north-east to 1,255 m at 203416; contours bend upstream where they cross the streams |
| Wetland | A marsh on the flat valley floor in the south-west, where the river is lowest and slowest | Marsh symbols in squares 2041, 2042, 2141 and 2142, all below the 1,300 m contour |
| Vegetation | A forest on the upper slopes of Hill V | Forest symbol over squares 2740, 2741 and 2841 |
The drainage pattern is dendritic (tree-like): tributaries join the main stream from both sides, as twigs join a branch. It develops where the rocks are of similar hardness throughout.
| Relationship | Evidence on Map A | Explanation |
|---|---|---|
| Relief controls the routes | The main road follows the gentle lower slopes south of the river, then the valley to the north-east | Gentle gradients are cheaper to build on and safer for heavy lorries carrying tea |
| Rivers attract crossing points and services | Village K grew at a road junction 1.5 km from the bridge | Junctions and bridging points bring traffic and customers, so shops, a church and a health centre gather there |
| Flat, wet land repels settlement | No buildings on the marsh in the south-west | Waterlogged ground floods, is hard to build on and can breed mosquitoes |
| Steep slopes keep their trees | Forest on the upper slopes of Hill V, above about 1,450 m | Steep slopes are hard to cultivate and erode quickly when cleared, so they are left under forest or planted with trees |
| Gentle, high land suits tea | The tea estate lies on gently sloping land between about 1,430 m and 1,480 m | Tea needs well-drained soils, reliable rain and cool highland temperatures; gentle land allows plucking and access for lorries |
| Processing near the raw material | The tea factory beside the estate and near the main road | Green leaf must be processed within hours of plucking; the road carries made tea out |
| Summits for survey | Trig station on the top of Hill T | Hilltops are visible from far away, so surveyors place their stations there |
Worked example 1: a full exam answer
Problem. Using evidence from Map A, explain two ways in which relief has influenced communication.
Answer.
Each point names the influence, gives map evidence with a grid reference, and explains why.
Worked example 2: suggesting an activity not shown
Problem. Suggest one economic activity carried out on the marsh at 2042, and justify it.
Answer. Rice growing or fish farming, or the cutting of papyrus and reeds for mats and roofing. Marshes hold water all year, which rice and fish ponds need, and they support reed vegetation. (Any suggestion must fit the evidence: a marsh symbol, low flat land beside a river.)
Warning
Common mistakes
Tip
Exam technique. For "relationship" questions, use one sentence pattern: "Human feature at grid reference is found on/near physical feature because reason." Three such sentences, each with different evidence, make a complete answer.
Practice
Practice (use Map A and the photographs)
Summary
Further reading
Sources and credits
Written by Ganzaa. Map A is invented for teaching and drawn by Ganzaa.
Photos: "Hills with terrace and tea plantations", Peace Batuma, Wikimedia Commons, CC BY-SA 4.0; "Rwanda, Country of thousand hill in Rutsiro", Davyimage, Wikimedia Commons, CC BY-SA 4.0. Both are shown unaltered with captions by Ganzaa. This lesson adapts CC BY-SA material and is shared under CC BY-SA 4.0.
