Knowledge Organiser: Map Skills
Part of Map and Spatial Skills · GCSE GCSE Geography revision
This topic summary covers Knowledge Organiser: Map Skills within Map and Spatial Skills for GCSE Geography. Revise Map and Spatial Skills in Geographical Skills for GCSE Geography with 15 exam-style questions and 20 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 13 of 13 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 13 of 13
Practice
15 questions
Recall
20 flashcards
Knowledge Organiser: Map Skills
Map Types
- Topographic (OS): symbols, contours, scale — physical + human features
- Choropleth: shaded areas — weakness: hides internal variation
- Isoline: equal-value lines (isobars, isotherms)
- Dot map: distribution pattern — weakness: no exact figures
- Proportional symbol: size = value — weakness: hard to compare circles
- Flow line: arrows showing movement and volume
OS Map Rules
- 1:50,000 → 2 cm = 1 km (Landranger, pink)
- 1:25,000 → 4 cm = 1 km (Explorer, orange)
- Contours every 10 m (1:50,000); every 5 m (1:25,000)
- Close contours = steep; wide contours = gentle
- V-shapes pointing uphill = river valley
- Concentric rings = hill summit
- Index contour = every 50 m (thicker + labelled)
Grid References
- Rule: easting then northing — "along the corridor, then up the stairs"
- 4-figure = 1 km² square (e.g., 4210)
- 6-figure = 100 m² point (e.g., 423104)
- CARTS: Corridor, Always, Room, Tenths, Six
- Tenths: divide each km square into 10 equal strips
- Check: first two digits of 6-figure = easting of 4-figure
Bearings and Coordinates
- N = 000°, E = 090°, S = 180°, W = 270°
- NE = 045°, SE = 135°, SW = 225°, NW = 315°
- Measured clockwise from north, always 3 figures
- Latitude = horizontal (flat) — given FIRST
- Longitude = vertical (long pole-to-pole) — given SECOND
- London: 51°N, 0°W | Nairobi: 1°S, 37°E | Sydney: 34°S, 151°E
Common Mistakes
- Reversing grid reference order: Always go along the easting FIRST, then up the northing — "along the corridor, then up the stairs"; reversing gives a completely different location on the map
- Giving a 4-figure reference when a 6-figure is needed: A 4-figure reference identifies a 1 km² square; a 6-figure reference pinpoints a 100 m² location — read the question carefully to give the right level of precision
- Misreading contour intervals: On a 1:50,000 OS map, contours are every 10 m; on a 1:25,000 map, every 5 m — check the map scale before estimating height or gradient
- Confusing latitude and longitude: Latitude lines are horizontal and measure distance from the equator (given first); longitude lines are vertical and measure distance from the Prime Meridian (given second) — remember "lat is flat"
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Read this section alongside the surrounding pages in Map and Spatial Skills. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Map and Spatial Skills
What does a six-figure grid reference identify on an Ordnance Survey map?
Define what an isoline map is and give one example of an isoline.
Quick Recall Flashcards
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