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Every Flat Map Is Lying About Something
You cannot flatten a sphere onto paper without stretching it somewhere — this is a mathematical fact, not a drafting flaw, and it is the single idea every map-projection question is built on. A projection is simply the rule used to transfer the globe's curved surface onto a flat sheet, and every rule preserves some property perfectly while distorting another.
Exams test exactly one skill here: given a projection's name or its stated property, identify what it sacrifices. A sailor's map that keeps every compass direction as a straight line (useful for navigation) cannot also keep every country's true size — somewhere far from the equator, area balloons. Once you know the trade-off table for the four projection families, 'which projection suits this use' questions answer themselves without needing to visualise any actual map.
1. Which map projection is the standard base for nautical charts because every constant-compass-bearing course appears as a straight line?
2. A map projection preserves true area at the cost of distorting shape. What is this type of projection called, and where is it typically used?
3. A map has a scale of 1:50,000. Two towns are 7 cm apart on the map. What is the actual ground distance between them?
4. On a topographic map, a contour line bends into a V-shape. What does the direction the V points tell you?
5. Two maps show the same pattern of concentric closed contour loops, one plain and one with inward-pointing tick marks (hachures). What is the difference between them?
6. Which projection is best suited for mapping a mid-latitude country with a wide east-west spread, such as the USA or Russia?
7. A 'large-scale' map and a 'small-scale' map differ in coverage and detail. Which statement correctly describes this difference?
8. An azimuthal (zenithal) projection is centred on a single point, often a pole. What property does it preserve from that central point?