Map Work, Cartographic Skills and Data Interpretation
Map work and cartography test precise reading of scale, direction, contours and data. The exam expects clear method and correct units.
Core rules
- Scale may be statement, representative fraction or graphic. Convert carefully: 1:50,000 means 1 cm = 0.5 km.
- Contours join points of equal height; close spacing means steep slope, wide spacing means gentle slope.
- A cross-section is drawn by transferring contour heights along a line and joining them smoothly.
- Map symbols distinguish settlements, roads, railways, rivers and vegetation.
- Graphs need labelled axes, units, a title and a suitable type: bar for categories, line for trends, pie for shares.
Worked example
On a 1:50,000 map, two places are 4 cm apart. Ground distance = 4 × 50,000 cm = 200,000 cm = 2 km. If the same map shows contours packed tightly on one side, the slope there is steep. Reasoning: the scale converts map to ground, while contour spacing converts relief to gradient. A full answer states both units and interpretation.
Traps
Do not forget to convert centimetres to kilometres. Do not read contour values downward when the index contour rises. Do not use a pie chart for time series. Do not draw a cross-section without vertical exaggeration or axis labels.