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MAP SCALES

MAP SCALES. Definition:. A Map Scale is a statement of a measure on a map and the equivalent measure on the Earth's surface. Function:. A map scale lets you measure the distance on a map then figure out how far that distance is in the real world. 3 Types of Map Scales. 3. Direct Statement.

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MAP SCALES

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  1. MAP SCALES

  2. Definition: A Map Scale is a statement of a measure on a map and the equivalent measure on the Earth's surface.

  3. Function: • A map scale lets you measure the distance on a map then figure out how far that distance is in the real world.

  4. 3 Types of Map Scales

  5. 3. Direct Statement • A direct statement scale is a statement that indicates the scale of the map.

  6. Example1: 1cm to 10 km • 1cm on the map represents 10km in the real world • If the distance between Here and There is 3cm (3 x 10) …therefore 3cm = 30km

  7. 1. Linear Scale • To use a linear scale, put a ruler over top of the scale, and then measure the distance on the map.

  8. 2. Representative Fraction • A Representative Fraction expresses what a unit on the map represents in the real world. • These can be either metric or imperial – it doesn’t matter.

  9. Example: 1:50 000 • One unit on the map represents 50,000 units in the real world. • 1 cm on the map would represent 50,000 cm on earth.

  10. Converting… • Converting an R.F scale to a Direct Statement scale: • 1 cm = 50,000 cm • 1 cm = (50,000 / 100,000)km • 1 cm = 0.5km • **100,000 cm in a km** • Converting a Direct Statement scale to an R.F scale: • 1 cm = 2.5km • 1 cm = (2.5 x 100,000)cm • 1 cm = 250,000 cm or 1:250,000

  11. Large Scale vs. Small Scale

  12. Small Scale Maps • World or country map = smallscale (1:360 000 000 000) allows for an overall view, but not much detail. • Ideal for travelling by car -- cover large areas of land.

  13. Large Scale • Town map or neighborhood map = larger scale, it features roads that can be shown clearly (1cm:500m) • Better for showing individual buildings in detail because they only cover a small area of land.

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